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Yielding transition under oscillatory shear in metallic glasses 认领 引用
1
作者 Nannan Ren Tiantian Meng +4 位作者 Hui Huang Qunshuang Ma Jun Fang Qin Li Weihuo Li 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第1期558-563,共6页
The yielding transition of amorphous solids remains a fundamental yet poorly understood issue in materials physics.In this work,we employ oscillatory shear to probe the yielding transition in metallic glasses(MGs)with... The yielding transition of amorphous solids remains a fundamental yet poorly understood issue in materials physics.In this work,we employ oscillatory shear to probe the yielding transition in metallic glasses(MGs)with various thermal histories.We identify three distinct deformation regimes depending on the applied strain amplitudes.Below the yield strainγy,the response is elastic and accompanied by aging,through reversible atomic rearrangements that preserve the material's initial memory of thermal history.Slightly aboveγy,the system undergoes a sharp transition during oscillatory cycles,indicated by a sudden rise in potential energy and non-affine displacement,along with the emergence of a shear band.Well aboveγy,plastic deformation dominates,driving samples of various initial stability toward a common steady state,while thermal histories are erased by irreversible rearrangements and shear band formation.These findings advance the understanding of failure mechanisms in MGs and shed light on tuning their mechanical performance in industrial applications involving cyclic loading. 展开更多
关键词 metallic glasses mechanical property oscillatory shear molecular dynamics simulation
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Free oxide ion abundances in Na,Ba,and K silicate glasses from O 1s XPS,29Si NMR,Raman,and MD simulations 认领 引用
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作者 G.Michael Bancroft H.Wayne Nesbitt +2 位作者 John S.Tse Grant S.Henderson Ben J.A.Moulton 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第5期21-47,共27页
In alkali silicate glasses with≤50 mol%M2O(M=Na,K,Rb,Cs),the existence of>1 mol%reactive“free”oxide(FO,where O is not bonded to Si)has been a highly controversial topic over the past 15 years.Unlike their cry... In alkali silicate glasses with≤50 mol%M2O(M=Na,K,Rb,Cs),the existence of>1 mol%reactive“free”oxide(FO,where O is not bonded to Si)has been a highly controversial topic over the past 15 years.Unlike their crystalline analogues,Raman and29Si nuclear magnetic resonance(NMR)studies since 1980 have shown that two or more Qn(n=0-4)species are present in silicate glasses over a wide range of compositions.For example,M2SiO3crystals contain only Q2species;however,glasses of the same composition exhibit Q1and Q3in addition to Q2.Previous Raman and NMR studies on alkali silicate glasses have related the abundances of these three species solely through disproportionation reactions(e.g.2Q2⇔Q1+Q3).In doing so,polymerization reactions(e.g.2Q2⇔2Q3+FO)were completely neglected.By combining published O 1s x-ray photoelectron spectroscopy(XPS)spectra,29Si NMR and Raman results for 40 mol%and 50 mol%Na2O,K2O,and BaO glasses,together with new molecular dynamics(MD)simulations of Na4SiO4glass,we provide consistent and compelling evidence for the existence of>1 mol%FO in these glasses and melts.In particular,for 50 mol%K2O silicate glass,all three experimental techniques estimate FO to be≥7 mol%,while MD simulations of Na4SiO4yield~5 mol%FO.Our analysis requires revised assignments(challenging decades of“conventional wisdom”)for29Si NMR and Raman spectra,based on O mass balance,recognition of M-BO bonding effects first identified in O 1s XPS spectra,and quantitative analysis of Raman spectra for 40-50 mol%Na2O,K2O,and BaO glasses.These FO values are comparable to those now accepted for alkaline-earth silicate glasses.The importance of this reactive FO for chemical reactivity(e.g.with H2O and CO2),bioactivity,and physical properties(e.g.melting)of silicate glasses is discussed. 展开更多
关键词 alkali silicate glasses free oxide (Na–O–Na) O 1s XPS Raman 29Si NMR
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Creep and recovery behavior of metallic glasses in a global strain approach within transition state theory 认领 引用 被引量：1
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作者 Langting Zhang Yajuan Duan +7 位作者 Yunjiang Wang Eloi Pineda Yong Yang Jean-Marc Pelletier Takeshi Wada Hidemi Kato Daniel Crespo Jichao Qiao 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期268-276,共9页
A unique global strain approach based on the transition state theory was proposed to quantify the creep-recovery processes of metallic glasses,in which the structure of glasses is predominantly governed by the macrosc... A unique global strain approach based on the transition state theory was proposed to quantify the creep-recovery processes of metallic glasses,in which the structure of glasses is predominantly governed by the macroscopic strain.This methodology allows for the calculation of strain-dependent activation energy and activation volume for flow defects.The activation energy and volume of creep both increase linearly with the magnitude of strain.Upon the glass-to-liquid transition,they get large and strain-independent,which serves as a signature of the glass transition.During creep recovery,the cooperation of deformation units increases the activation volume but decreases activation energy due to the decrease in free volume.Notably,only a fraction of the anelasticity accumulated during creep persists in the recovery process;the rest is suppressed by structural relaxation.The results introduce physical insights into the deformation and relaxation of metastable solids that are not available in the usual rate-dependent theory developed for crystal plasticity. 展开更多
关键词 Metallic glass Creep Recovery Anelasticity Plasticity
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Dominating Factors of Thermal Conductivity in Magnesiumcalcium Substituted Silicate Glasses 认领 引用
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作者 JIAO Kui ZHANG Qing +1 位作者 LIU Pengfei GU Shaoxuan 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第4期952-955,共4页
To investigate the key factors governing thermal conductivity in silicate glasses,we focused on a glass series where magnesium substitutes calcium for systematic investigation.With the increasing magnesium content,the... To investigate the key factors governing thermal conductivity in silicate glasses,we focused on a glass series where magnesium substitutes calcium for systematic investigation.With the increasing magnesium content,the thermal conductivity(ĸ)shows a linearly increasing trend.Based on the phonon gas model,Debye sound velocity,phonon mean free path andĸmaintain strongly correlate near-linear relationships.Moreover,the volumetric heat capacity remains relatively invariant across compositions.Given the inherent strong phonon scattering characteristic of amorphous systems,the phonon mean free path in this glass series shows constrained variation.which restricts the behavior and establishes Debye sound velocity as the principal determinant governingĸevolution.The observed linear variation in thermal conductivity arises from the common linear trends of the debye sound velocity,volumetric heat capacity and phonon mean free path with respect to the substitution of magnesium ions for calcium ions. 展开更多
关键词 silicate glasses thermal conductivity
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High-Entropy Metallic Glasses:A Review of Recent Research Progress 认领 引用
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作者 Xu Zhou Cui Jiayin +2 位作者 He Chang Gu Jingda Wang Qing 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第9期2238-2256,共19页
Over the past years,high-entropy metallic glasses(HEMGs)have attracted increasing research interest due to their unique structural characteristics arising from high configurational entropy,as well as distinctive prope... Over the past years,high-entropy metallic glasses(HEMGs)have attracted increasing research interest due to their unique structural characteristics arising from high configurational entropy,as well as distinctive properties such as sluggish diffusion,microstructural heterogeneity,enhanced glass-forming ability(GFA),and improved thermal/mechanical stability.Similar to conventional metallic glasses(MGs),HEMGs lack long-range atomic periodicity;however,the high-entropy effect introduces additional complexity in structural evolution,such as decoupling of the glass transition,potential glass-to-glass transitions,and a continuous polyamorphic transition during reheating.This enables HEMGs with tunable atomic rearrangement,atomic interactions,and chemicalopological heterogeneity,thereby conferring great potential for achieving superior structural and functional properties.Although several review papers have summarized the development of HEMGs,the rapid advancement of this field inspires us to provide a concise overview discussion of the latest research progress in HEMG-forming alloy systems.This review first focused on the GFA of newly developed HEMGs,followed by a comparative analysis of their unusual structural relaxation,crystallization behavior,and mechanical properties relative to conventional MGs.Finally,the unique atomic-scale structure and structural heterogeneity of HEMGs were reviewed,and the review concluded with a summary and outlook. 展开更多
关键词 high-entropy metallic glasses glass-forming ability thermal stability mechanical property atomic-scale structure
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Research Progress on Homogeneous Deformation of Metallic Glasses 认领 引用
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作者 Zhang Langting Duan Yajuan +1 位作者 Li Bowen Qiao Jichao 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第9期2209-2218,共10页
Metallic glasses exhibit exceptional properties but suffer from brittle fracture via shear banding at room temperature.Homogeneous deformation is vital for understanding amorphous plasticity.This review summarized rec... Metallic glasses exhibit exceptional properties but suffer from brittle fracture via shear banding at room temperature.Homogeneous deformation is vital for understanding amorphous plasticity.This review summarized recent advances in homogeneous deformation of metallic glasses in atomic-scale flow mechanisms,evolution of shear transformation zones,flow defects,and hierarchical relaxation processes.The correlation among free volume kinetics,stress-temperature equivalence,and rejuvenation threshold stress was introduced.Role of structural heterogeneity in flow stability was discussed,alongside the application of modern characterization and modeling techniques.The review proposed investigation methods for designing high ductile metallic glasses based on these insights. 展开更多
关键词 metallic glass homogeneous deformation relaxation shear transformation zone rejuvenation
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Synergistic enhancement of machinability and surface integrity in bulk metallic glasses via cold plasma pretreatment and ultrasonic vibration-assisted micromilling 认领 引用
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作者 Qilin LI Emek Babuskin KOCYIGIT +3 位作者 Long YE Nan YU Pingfa FENG Jianjian WANG 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS CSCD 2026年第5期466-478,I0008,共13页
Bulk metallic glasses(BMGs)exhibit exceptional properties,but are difficult to machine due to their high hardness and brittleness.In this study,we propose a novel hybrid machining strategy integrating cold plasma(CP)p... Bulk metallic glasses(BMGs)exhibit exceptional properties,but are difficult to machine due to their high hardness and brittleness.In this study,we propose a novel hybrid machining strategy integrating cold plasma(CP)pretreatment with ultrasonic vibration-assisted micromilling(UVAM),termed CP-UVAM,to overcome these challenges.We reveal the fundamental mechanism by which CP independently optimizes machining:it transforms the BMG surface from hydrophobic to superhydrophilic(contact angle<10°)through oxidation and the introduction of polar groups,thereby enhancing lubricant penetration.Crucially,CP treatment increases the near-surface free volume,significantly improving plastic deformability,as evidenced by nanoindentation(15%‒20%reduction in the first pop-in force)and nanoscratching tests.Four methods-conventional milling(CM),CP-assisted milling(CPAM),UVAM,and CP-UVAM-were systematically compared.While CPAM alone delivered the best surface finish and least tool wear,UVAM achieved a 29.02%cutting force reduction at the cost of severe tool edge chipping.The synergistic CP-UVAM approach retained the force reduction advantage of UVAM(34.36%reduction vs CM)while dramatically mitigating UVAM-induced tool damage,reducing edge chipping by 43.97%,and achieving superior surface consistency(a surface roughness of 2.601μm in the stable state).This study demonstrates that CP independently enhances BMG machinability and works synergistically with UVAM,enabling high-precision micromilling of this challenging material through the combination of plasma-induced plasticity and wettability with ultrasonic vibration-assisted force reduction. 展开更多
关键词 Bulk metallic glass(BMG) Micromilling Cold plasma(CP) Ultrasonic vibration Surface integrity
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Numerical Simulations of Dynamical Relaxations in Metallic Glasses:A Short Review 认领 引用
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作者 Claudio Fusco 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第9期2219-2237,共19页
Metallic glasses are a unique class of materials with exceptional mechanical properties,including high strength,excellent corrosion resistance,and significant elasticity.These materials display intriguing dynamical re... Metallic glasses are a unique class of materials with exceptional mechanical properties,including high strength,excellent corrosion resistance,and significant elasticity.These materials display intriguing dynamical relaxation processes,which influence their mechanical and thermal properties.Understanding the dynamical relaxations in metallic glasses is crucial for optimizing their performance in various applications.Due to the restrictions of experimental techniques to access processes at the atomic level,the detailed mechanisms responsible for the dynamical relaxations cannot be easily obtained.Numerical simulations are potential candidates to analyze the elementary dynamical processes at the atomic scale and thus to capture the fundamental origin of dynamical relaxations.The development of computing has allowed researchers to reach an enormous advancement in the understanding of the physical mechanisms behind dynamical relaxations in metallic glasses.This review provides a brief overview of the current state of research in numerical simulations of dynamical relaxations in metallic glasses,highlighting key methodologies,significant findings,ongoing challenges,and future directions.By synthesizing current research,this review emphasizes the importance of these simulations in improving the design and processing of metallic glasses(from structural materials to high-performance components)for a wide range of applications. 展开更多
关键词 metallic glass dynamical relaxation numerical simulation computing
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Recent Development on Oxide Glasses Exhibiting the Faraday Effect 认领 引用
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作者 TANAKA Katsuhisa 《硅酸盐学报》 EI CAS CSCD 北大核心 2026年第4期1307-1323,共17页
The Faraday effect is one of the magneto-optical phenomena and refers to the conversion of linearly polarized light passing through a magnetic material into elliptically polarized light with the main axis-containing p... The Faraday effect is one of the magneto-optical phenomena and refers to the conversion of linearly polarized light passing through a magnetic material into elliptically polarized light with the main axis-containing polarization plane rotated around the propagation vector.The angle by which the polarization plane is rotated,i.e.,the Faraday rotation angle,is an important parameter determining the applicability of magnetic materials in devices such as electric-current and magnetic-field sensors,optical isolators,and optical circulators.Since the Faraday effect deals with a transmitted light,the transmittance of the magnetic materials is another important factor for applications.Thus,the materials are required to show a great magneto-optical figure of merit,that is defined as Faraday rotation angle or Verdet constant divided by absorbance or optical absorption coefficient.Here,the Verdet constant is defined as the Faraday rotation angle divided by external magnetic field and light path length inside the magnetic materials.It is well known that single crystals of garnet-type ferrites such as Y3Fe5O12and(Gd,Bi)3Fe5O12exhibit a large Faraday effect and a low optical absorption in the infrared region,especially in a wavelength range from 1.3μm to 1.5μm,and that they are effectively utilized as an optical isolator for optical telecommunications.However,compared to the garnet-type ferrites in the infrared region,magneto-optical materials with the superior performance,are lacking in the visible to ultraviolet region.Hence,the development of such materials is still in progress.Oxide glasses rich in rare-earth ions exhibit a great Faraday effect,especially in the visible to ultraviolet range.Although these glasses feature magnetizations smaller than those of ferro-or ferri-magnetic oxide crystals such as abovementioned Y3Fe5O12because the rare-earth-containing glasses are usually paramagnetic at room temperature,the transmittance of these glasses notably exceeds that of ferrite crystals in the visible to ultraviolet range.In addition,oxide glass has an advantage that it is feasible to tune continuously the composition so that optimized properties are attained and to fabricate large-sized and specific-shaped materials.In addition to the paramagnetic glasses,the Faraday effect of diamagnetic glasses is intensively investigated as well.The magnetization of diamagnetic glasses is further smaller than that of paramagnetic glasses,but the Faraday rotation angle or the Verdet constant of diamagnetic glasses is almost independent of temperature.This is an advantageous point of diamagnetic glasses,which cannot be realized in ferro-magnetic,ferri-magnetic,and para-magnetic materials.Furthermore,for wide-band gap oxide glass like SiO2glass,which is diamagnetic,the Faraday effect can occur even in a very short wavelength range such as the deep and vacuum ultraviolet.This review represents recent development on oxide glasses exhibiting large Faraday rotation.The macroscopic and microscopic mechanism of the Faraday effect are explained.The microscopic mechanism is very important to select magneto-optically active elements and to design glass compositions.Also,the Faraday effect of diamagnetic glasses is described.Heavy-metal oxide glasses and sulfide glasses are intensely exploited because the magnetic susceptibility of diamagnetic materials depends on the constituent atoms(ions)and the susceptibility is proportional to the squared atomic(ionic)radius and the number of electrons contained in the atom(ion).The Verdet constants of these glasses are summarized.The applications of diamagnetic glasses are briefly mentioned.Subsequently,the Faraday effect of paramagnetic oxide glasses containing large amounts of rare-earth ions is reviewed.The pioneering work in this field has been carried out in the mid-1960s,showing that some ions like Ce3+,Pr3+,Tb3+,Dy3+,and Eu^(2+)give rise to larger Verdet constants in the visible range.A description is given to explain why these rare-earth ions exhibit larger Faraday effects than other ones.Recent researches seem to mainly pay attention to Tb3+-rich oxide glasses,for which higher concentrations of Tb3+ions simply enhance the Verdet constant.In particular,Tb3+-rich oxide glasses fabricated via containerless processing,which is an emerging method and effective to expand the glass-forming region,showing the larger Verdet constant than single-crystalline Tb3Ga5O12used as a commercially available optical isolator in the visible range.Furthermore,EuO-based amorphous oxides that have an unexpected ferromagnetism exhibit rather large Faraday effect.In addition to the abovementioned diamagnetic oxide glasses and rare-earth-rich oxide glasses,a brief review concerns the Faraday effect of oxide glasses containing large amounts of 3d transition metal ions as well as glass-ceramics comprising ferro-or ferri-magnetic nano-sized crystalline particles embedded in transparent glass matrices.Summary and Prospects The Faraday effect was discovered 180 years ago,but this phenomenon has been still utilized for practical applications as mentioned above.In particular,Tb3+-rich and Eu^(2+)-rich oxide glasses are important for both fundamentals and applications.The Tb3+-rich glasses show a high transparency even in blue to ultraviolet region,so that the magneto-optical figure of merit is large enough to apply for an optical isolator.The Eu^(2+)-rich glasses are ferromagnetic,so that they notably show a large Faraday effect.A new technique of glass formation such as containerless processing is effective to produce new glass compositions with further higher concentrations of rare-earth ions that are expected to exhibit a larger Verdet constant.Besides,the possible enhancement of Faraday effect based on plasmonics and Mie-tronics,i.e.,the usage of localized surface plasmon resonance of metal nanoparticles and the Mie resonance of dielectric nanoparticles to increase the Verdet constant,becomes an important subject in the near future.With the development of high-power lasers,the demand for optical isolators that can operate in a wide wavelength range must increase.The oxide glasses have a promising application in such fields. 展开更多
关键词 oxide glass Faraday effect Verdet constant ferromagnetic amorphous oxide rare earth divalent europium
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重塑日常的49G:ROKID GLASSES如何以设计定义智能眼镜的未来 认领 引用
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作者 无 《设计》 2026年第6期38-43,共6页
看点key feature设计范式革新DESIGN PARADIGM INNOVATION物理级隐私守护HARDWARE-LEVEL PRIVACY PROTECTION包容性设计实践INCLUSIVE DESIGN PRACTICE Rokid Glasses是全球首款实现量产的“摄像头+AR显示+AI能力”全功能智能眼镜,以49... 看点key feature设计范式革新DESIGN PARADIGM INNOVATION物理级隐私守护HARDWARE-LEVEL PRIVACY PROTECTION包容性设计实践INCLUSIVE DESIGN PRACTICE Rokid Glasses是全球首款实现量产的“摄像头+AR显示+AI能力”全功能智能眼镜,以49g超轻机身、时尚造型与强大的AI能力,致力于成为用户可以全天候佩戴的智能助手。产品与BOLON眼镜联名设计,远销115个国家,累计超10万活跃用户,单日佩戴时长可达8小时。 展开更多
关键词 ROKID GLASSES 智能眼镜 设计范式革新
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Optimizing structural ordering degree to improve the mechanical reliability of metallic glasses 认领 引用 被引量：1
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作者 Shuang Su Wenjie Zhao +6 位作者 Xin Su Yagnesh Shadangi Zhishuai Jin Zhiliang Ning Yanming Zhang Jianfei Sun Yongjiang Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第24期304-314,共11页
This study systematically investigates the influences of annealing treatment on the energy state,microstructure and macroscopic mechanical behaviors of metallic glasses(MGs).By reducing the energy state,the annealing ... This study systematically investigates the influences of annealing treatment on the energy state,microstructure and macroscopic mechanical behaviors of metallic glasses(MGs).By reducing the energy state,the annealing process significantly enhances the structural ordering degree and uniformity of MGs,thereby improving their overall mechanical reliability.Specifically,annealing promotes the formation of localized icosahedral short-range order,a structural signature that contributes to improved nanohardness and tensile strength.Furthermore,the release and redistribution of internal stress during annealing further optimize the internal stress state,significantly enhancing the fracture resistance and achieving reliable mechanical performance.This study not only elucidates the regulatory mechanisms of annealing on the microstructure of MGs but also provides theoretical support and experimental evidence for exploring MG materials with high strength and high fracture reliability. 展开更多
关键词 Metallic glasses Annealing Ordering degree Mechanical performance
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Automatic diagnosis of agromyzid leafminer damage levels using leaf images captured by AR glasses 认领 引用 被引量：1
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作者 Zhongru Ye Yongjian Liu +10 位作者 Fuyu Ye Hang Li Ju Luo Jianyang Guo Zelin Feng Chen Hong Lingyi Li Shuhua Liu Baojun Yang Wanxue Liu Qing Yao 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2025年第9期3559-3573,共15页
Agromyzid leafminers cause significant economic losses in both vegetable and horticultural crops,and precise assessments of pesticide needs must be based on the extent of leaf damage.Traditionally,surveyors estimate t... Agromyzid leafminers cause significant economic losses in both vegetable and horticultural crops,and precise assessments of pesticide needs must be based on the extent of leaf damage.Traditionally,surveyors estimate the damage by visually comparing the proportion of damaged to intact leaf area,a method that lacks objectivity,precision,and reliable data traceability.To address these issues,an advanced survey system that combines augmented reality(AR)glasses with a camera and an artificial intelligence(AI)algorithm was developed in this study to objectively and accurately assess leafminer damage in the feld.By wearing AR glasses equipped with a voice-controlled camera,surveyors can easily flatten damaged leaves by hand and capture images for analysis.This method can provide a precise and reliable diagnosis of leafminer damage levels,which in turn supports the implementation of scientifically grounded and targeted pest management strategies.To calculate the leafminer damage level,the DeepLab-Leafminer model was proposed to precisely segment the leafminer-damaged regions and the intact leaf region.The integration of an edge-aware module and a Canny loss function into the DeepLabv3+model enhanced the DeepLab-Leafminer model's capability to accurately segment the edges of leafminer-damaged regions,which often exhibit irregular shapes.Compared with state-of-the-art segmentation models,the DeepLabLeafminer model achieved superior segmentation performance with an Intersection over Union(IoU)of 81.23%and an F1score of 87.92%on leafminer-damaged leaves.The test results revealed a 92.38%diagnosis accuracy of leafminer damage levels based on the DeepLab-Leafminer model.A mobile application and a web platform were developed to assist surveyors in displaying the diagnostic results of leafminer damage levels.This system provides surveyors with an advanced,user-friendly,and accurate tool for assessing agromyzid leafminer damage in agricultural felds using wearable AR glasses and an AI model.This method can also be utilized to automatically diagnose pest and disease damage levels in other crops based on leaf images. 展开更多
关键词 agromyzid leafminer plant leaf image damage level AR glasses DeepLabv3+model image segmentation
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Optimization of glass-forming ability and synergistic enhancement of strength plasticity in Cu50Zr46Al4metallic glasses through Ag additions 认领 引用
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作者 Dongmei Li Zhongyi Zhang +3 位作者 Bolin Shang Rui Feng Xuefeng Li Peng Yu 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第8期646-650,共5页
Bulk metallic glasses(BMGs)are typically characterized by high strength and elasticity.However,they generally demonstrate a deficiency in plastic deformation capability at room temperatures.In this work,Cu50-xZr_(4... Bulk metallic glasses(BMGs)are typically characterized by high strength and elasticity.However,they generally demonstrate a deficiency in plastic deformation capability at room temperatures.In this work,Cu50-xZr46Al4Agx(x=0,1,2,3,4)alloys were prepared by arc melting and copper mold casting to investigate their structure,glass-forming ability,and mechanical properties.The results show that the addition of Ag can increase the parameter of DTx and g in Cu50Zr46Al4alloy by 116%and 1.5%respectively,effectively enhancing its thermal stability and glass-forming ability.Compressive fracture tests reveal that the addition of Ag can significantly improve the yield strength,ultimate strength,and plasticity of the Cu50Zr46Al4alloy.Specifically,with the Ag addition of 1 at.%,the alloy’s ultimate strength and plasticity increased by 71.8%and 21 times,respectively.Furthermore,the introduction of Ag can effectively control the free volume content in the Cu50Zr46Al4alloy,thereby tuning the hardness of the material.This work provides valuable insights into improving the mechanical performance of BMGs through micro-alloying approaches. 展开更多
关键词 metallic glasses glass-forming ability synergistic enhancement strength-plasticity Ag addition
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Correlation between metastable pitting and structural heterogeneity in Co-based metallic glasses 认领 引用
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作者 Haoran Ma Dongxue Han +7 位作者 Chunyang Mu Feixiong Mao Aina He Yaqiang Dong Deren Li Qikui Man Baogen Shen Jiawei Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第25期125-136,共12页
By employing micrometer-diameter microelectrodes, the metastable pitting corrosion behavior of Co68.15Fe4.35Si12.5B12Cr3 metallic glasses (MGs) exposed to 0.6 mol/L NaCl solution was investigated to cla... By employing micrometer-diameter microelectrodes, the metastable pitting corrosion behavior of Co68.15Fe4.35Si12.5B12Cr3 metallic glasses (MGs) exposed to 0.6 mol/L NaCl solution was investigated to clarify the correlation between metastable pitting and structural heterogeneity in MGs. Thermally induced degeneration of structural heterogeneity inhibits the initiation, decelerates the growth kinetics, and accelerates the repassivation kinetics of metastable pits while also decreasing the probability of transition from metastability to stability. This enhanced resistance to pitting corrosion is attributed to a reduction in active pitting precursor sites and a decrease in electrochemical activity caused by the structural homogenization of MGs. 展开更多
关键词 Metallic glasses Structural heterogeneity Metastable pitting Pitting kinetics
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Ultrasonic vibration-assisted joining of multiform metallic glasses in varied environments 认领 引用
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作者 Lu-Yao Li Jian-Yu Chen +9 位作者 Li-Xing Zhu Yu Zhang Jian Zhu Xin Li Wei Li Kang-Yu Lin Xing-Ran Zhao Xiao-Di Liu Chen-Chen Yuan Jiang Ma 《Rare Metals》 SCIE EI CAS CSCD 2025年第12期10761-10775,共15页
The evolution of joining technologies has profoundly propelled advancements across human civilization.Although modern joining processes have attained remarkable sophistication in conventional manufacturing,constructio... The evolution of joining technologies has profoundly propelled advancements across human civilization.Although modern joining processes have attained remarkable sophistication in conventional manufacturing,construction,and aerospace applications,their operational adaptability in special environments—including underwater,hyper-corrosive,explosive,and cryogenic conditions—remains fundamentally constrained.This limitation underscores the critical demand for facile and robust joining methodologies tailored for specialized environments.Here,we present an innovative strategy using ultrasonic vibration to enable joining across diverse metallic glasses morphologies under these demanding conditions.Leveraging ultrasonic vibration-induced plasticity and the unique activation mechanisms of metallic glasses,this approach demonstrates unprecedented compatibility with bulk,ribbon,and powder forms.Distinct engineered joint structures emerge across different materials,achieving mechanical strengths comparable to parent materials(1904 MPa compressive strength).This breakthrough establishes a transformative platform for offshore,polar,oil-gas,and space engineering applications and pioneers a universal design way for materials with programmable performance characteristics. 展开更多
关键词 Varied environments Joining Metallic glasses Ultrasonic Vibration
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Achieving ultrahigh-specific strength and enhanced GFA in Ti-based bulk metallic glasses via a two-step alloying strategy 认领 引用
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作者 Heng-Tong Bu Jia-Lun Gu +2 位作者 Yun-Shuai Su Yang Shao Ke-Fu Yao 《Rare Metals》 SCIE EI CAS CSCD 2025年第3期1932-1942,共11页
Ti-based bulk metallic glasses(BMGs)have attracted increasing attention due to their high specific strength.However,a fundamental conflict exists between the specific strength and glass-forming ability(GFA)of Ti-based... Ti-based bulk metallic glasses(BMGs)have attracted increasing attention due to their high specific strength.However,a fundamental conflict exists between the specific strength and glass-forming ability(GFA)of Ti-based BMGs,restricting their commercial applications significantly.In this study,this challenge was addressed by introducing a two-step alloying strategy to mitigate the remarkable density increment effect associated with heavy alloying elements required for enhancing the GFA.Consequently,through two-step alloying with Al and Fe in sequence,simultaneous enhancements in specific strength and GFA were achieved based on a Ti-Zr-Be ternary metallic glass,resulting in the development of a series of centimeter-sized metallic glasses exhibiting ultrahigh-specific strength.Notably,the newly developed(Ti45Zr20Be31Al4)94Fe6alloy established a new record for the specific strength of Ti-based BMGs.Along with a critical diameter(Dc)of 10 mm,it offers the optimal scheme for balancing the specific strength and GFA of Ti-based BMGs.The present results further brighten the application prospects of Ti-based BMGs as lightweight materials. 展开更多
关键词 Ti-based bulk metallic glasses Specific strength Glass-forming ability Two-step alloying strategy
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Thermodynamic and mechanical properties of Co -Fe-Ni-Zn-P multicomponent metallic nanoglasses: Some insight into the entropy -stabilized glass-glass interfaces 认领 引用
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作者 Tian Li Nana Li +1 位作者 Rongxue Luo Guangping Zheng 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2025年第8期1965-1977,共13页
Although the existence of glass–glass interfaces(GGIs)enables improved ductility of metallic nanoglasses(NGs),the excess free volumes at GGIs would cause the NGs to have a much-reduced mechanical strength.Herein,entr... Although the existence of glass–glass interfaces(GGIs)enables improved ductility of metallic nanoglasses(NGs),the excess free volumes at GGIs would cause the NGs to have a much-reduced mechanical strength.Herein,entropy-stabilized GGIs have been in-vestigated in Co–Fe–Ni–Zn–P NGs,which have a large entropy of mixing(1.32R,where R is the gas constant)and could be in a new glass phase,different from that of glassy grain interiors.Through quantitatively determining the activation energy of glass transition sep-arately for the GGIs and glassy grain interiors,the excess free volumes at GGIs are found to be reduced in comparison with those in the glassy grain interiors.The thermodynamically stable GGIs could be associated with increasing entropy of mixing in the GGI regions,which stabilizes the atomic structures of GGIs and enhances the glass forming ability of Co–Fe–Ni–Zn–P NGs.The influences of entropy-stabilized GGIs on the mechanical properties of Co–Fe–Ni–Zn–P NGs are further investigated by nanoindentation and creep tests under tensile deformation,demonstrating that there are notable enhancements in the ductility and mechanical strength for Co–Fe–Ni–Zn–P NGs.This work contributes to an in-depth understanding on the GGI phase in NGs and offers an alternative method for strengthening NGs through GGI engineering. 展开更多
关键词 glass–glass interfaces metallic nanoglasses high-entropy effects mechanical properties thermodynamic properties
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Intelligent Survey Method for Tiny Rice Pests and Their Natural Predators in Paddy Fields Using Augmented Reality(AR)Glasses 认领 引用 被引量：1
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作者 HONG Chen LUO Ju +5 位作者 FENG Zelin LING Heping LI Lingyi WU Jian YAO Qing LIU Shuhua 《Rice science》 SCIE CSCD 2025年第6期868-884,共17页
Rice crops are frequently threatened by pests such as rice planthoppers(Nilaparvata lugens,Sogatella furcifera,and Laodelphax striatellus)and leafhoppers(Cicadellidae),which cause significant yield losses.Accurate ide... Rice crops are frequently threatened by pests such as rice planthoppers(Nilaparvata lugens,Sogatella furcifera,and Laodelphax striatellus)and leafhoppers(Cicadellidae),which cause significant yield losses.Accurate identification of both pest developmental stages and their natural predators is crucial for effective pest control and maintaining ecological balance.However,conventional field surveys are often subjective,inefficient,and lack traceability.To overcome these limitations,this study proposed RiceInsectID,a two-stage cascaded detection method designed to identify and count tiny rice pests and their natural predators from white flat plate images captured by head-worn AR glasses.The method recognizes 25 insect classes,including 17 instars of rice planthoppers,2 instars of leafhoppers,4 spider species(Araneae),as well as Miridae and rove beetles(Staphylinidae Latreille).At the first coarse-grained detection stage,16 visually similar classes are consolidated into 6 broader categories and detected using an enhanced YOLOv6 model.To improve small object detection and address class imbalance,the fullregion overlapping sliding slices and target pasting(FOSTP)algorithm was applied,increasing the mean average precision at a 50%IoU threshold(mAP50)by 35.46%over the baseline YOLOv6.Feature extraction and fusion were further improved by incorporating an efficient channel attention path aggregation feature pyramid network(ECA-PAFPN)and adaptive structure feature fusion(ASFF)modules,while the balanced classification mosaic(BCM)enhanced detection of minority classes.With test-time augmentation(TTA),mAP50 improved by an additional 2.06%,reaching 84.71%.At the second fine-grained classification stage,each of the six broad classes from the first stage is further classified using individual ResNet50 models.Online data augmentation and transfer learning were employed to significantly enhance generalization.Compared with the baseline YOLOv6,the two-stage cascaded method improved recall by 4.06%,precision by 3.79%,and the F1-score by 3.92%.Overall,RiceInsectID achieved 82.85%recall,80.62%precision,and an F1-score of 81.72%,demonstrating an efficient and practical solution for monitoring tiny rice pests and their natural predators in paddy fields.This study provides valuable insights for ecosystem monitoring and supporting sustainable pest management in rice agriculture. 展开更多
关键词 tiny rice pest natural predator AR glasses intelligent survey object detection fine-grained recognition
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Integrating dynamic relaxation with inelastic deformation in metallic glasses: Theoretical insights and experimental validation 认领 引用 被引量：3
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作者 G.H.Xing Q.Hao +5 位作者 Guo-Jian Lyu F.Zhu Yun-Jiang Wang Y.Yang E.Pineda J.C.Qiao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第15期135-152,共18页
Metallic glasses(MGs),a metastable material far from equilibrium,exhibit intricate dynamic relaxation behaviors.The challenge lies in developing a model that accurately describes the dynamics and deforma-tion mechanis... Metallic glasses(MGs),a metastable material far from equilibrium,exhibit intricate dynamic relaxation behaviors.The challenge lies in developing a model that accurately describes the dynamics and deforma-tion mechanisms of MG.This paper introduces a model integrating dynamic relaxation with deformation behavior.Validation through dynamic mechanical analysis,stress relaxation,creep,and strain recovery tests confirm the existence of four deformation modes:elasticity,anelasticity fromβrelaxation,anelas-ticity fromαrelaxation at low temperatures,and viscoplasticity fromαrelaxation at high temperatures.The model captures all of these deformation modes.The dynamical mechanical spectrum and stress re-laxation spectrum unveil dynamic features during glass to liquid transition,and a simple and effective experimental method was developed for identifying ultra-low-frequency dynamic relaxation.This work provides new perspectives on the study of relaxation dynamics in glassy states and establishes impor-tant connections between dynamic relaxation behavior and deformation mechanisms.These findings lay a theoretical and experimental foundation for the broad application of MGs. 展开更多
关键词 Metallic glass Stress relaxation Creep Dynamic relaxation Quasi-point defect model
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Bismuth's role in quaternary thulium doped tellurite glasses:Achieving optical clarity and radiation shielding 认领 引用
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作者 N.A.M.Rusni N.A.Abdul-Manaf +3 位作者 N.Ahmad L.Hasnimulyati W.Y.W.Yusoff A.Azuraida 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2025年第9期134-144,共11页
This study explores the impact of bismuth oxide(Bi2O3)on the optical and radiation shielding properties of transparent,lead-free thulium-doped bismuth borotellurite radiation shielding glass.The investigated gla... This study explores the impact of bismuth oxide(Bi2O3)on the optical and radiation shielding properties of transparent,lead-free thulium-doped bismuth borotellurite radiation shielding glass.The investigated glass composition follows the formula[(TeO2)75(B2O3)25]98-x(Bi2O3)_x[Tm2O3]2,where x=0 mol%,5 mol%,10 mol%,15 mol%,20 mol%,25 mol%,and 30 mol%.All glass samples remain transparent,with an optical bandgap(Eopt)exceeding 3.1 e V,ensuring visible light transmission.Radiation shielding data from Phy-X and XCom reveal interactions of the photoelectric effect,Compton scattering,and pair production,with minimal relative difference in mass attenuation coefficient(MAC)which is between0.05 and 0.56.At 0.662 Me V photon energy,the 20 mol%and 25 mol%Bi2O3glasses exhibit significantly higher Phy-X MAC values than other samples,except RS 520 glass,which contains 71%Pb O.Despite incorporating only up to 25 mol%Bi2O3,these glasses outperform others in density,half-value layer(HVL),and mean free path(MFP).Correlating Eoptand MAC,the 20 mol%Bi2O3glass is the best candidate for transparent radiation shielding glass due to its wide optical bandgap which prevents ionization of trapped holes.Significantly,the linkage between MFP and molar refraction was also discovered based on the particle size influence on both parameters. 展开更多
关键词 Thulium-doped bismuth borotellurite glasses Optical Radiation shielding Lead-free Phy-X XCom
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