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Development of silicon carbide fiber-reinforced silicon oxycarbide composites for low-observable unmanned aerial vehicle exhaust nozzles via filament winding,and polymer infiltration and pyrolysis 认领 引用 被引量：2
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作者 Byeong-Joo Kim Ji Eun Lee +4 位作者 Chang-Bin Oh Doo Hyun Choi Man Young Lee Dae Young Jo Shin Kim 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第2期49-65,共17页
Unmanned combat aerial vehicles require lightweight,stealth-capable exhaust systems.However,traditional metallic nozzles increase radar detectability and reduce range,while advanced composites offer high performance b... Unmanned combat aerial vehicles require lightweight,stealth-capable exhaust systems.However,traditional metallic nozzles increase radar detectability and reduce range,while advanced composites offer high performance but are expensive.Therefore,to improve the operational range and survivability of unmanned combat aerial vehicles,a lightweight,high-temperature-resistant,oxidation-resistant,and low-observable composite exhaust nozzle is developed to replace conventional metallic straight-type nozzles.The nozzle features a double serpentine shape to reduce radar and infrared signatures and is manufactured as a monolithic structure using the filament winding process,accommodating the complex geometry and large size(length:1.8 m,width:0.8 m).The exhaust nozzle consists of a ceramic matrix composite made of silicon carbide fibers and a silicon oxycarbide matrix,which absorbs and scatters radio frequency signals while withstanding prolonged exposure to high-temperature(700℃)oxidizing environments typical of engine exhaust gases.The polysiloxane resin used to produce the silicon oxycarbide matrix poses significant challenges owing to its low tackiness and high viscosity variations depending on the presence of nanoparticles,making filament winding difficult.These challenges are addressed by optimizing resin viscosity and winding pattern design.As a result,the tensile strength of the composite specimens fabricated with the optimized viscosity increases by 228.03% before pyrolysis and 97.68%after pyrolysis,compared with that of the non-optimized specimens.In addition,the density and tensile strength of the composite processed via three cycles of polymer infiltration and pyrolysis increased by 13.08% and 80.37%,respectively,compared to those of the non-densified composite.High-temperature oxidation and flame tests demonstrate exceptional thermal and oxidative stability.Furthermore,when compared with carbon fiber-reinforced ceramic matrix composites,the developed composite exhibits a permittivity at least two levels lower and a reflection loss below7 dB within the frequency range of 9.3-10.9 GHz,underscoring its superior electromagnetic stealth performance. 展开更多
关键词 Filament winding Polymer infiltration and pyrolysis Ceramic matrix composites Exhaust nozzle Low observability
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Material removal mechanism of SiCf/SiC composites during ultrasonic-assisted scratching with vertical vibration 认领 引用 被引量：2
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作者 Zhigang DONG Guoqing YUAN +3 位作者 Yichuan RAN Haiqi SUN Jiansong SUN Yan BAO 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第1期584-600,共17页
Ultrasonic-Assisted Grinding(UAG)is a novel manufacturing technology that shows promising promise for use in processing Ceramic Matrix Composites(CMCs).Nevertheless,analyzing the material removal process of CMCs with ... Ultrasonic-Assisted Grinding(UAG)is a novel manufacturing technology that shows promising promise for use in processing Ceramic Matrix Composites(CMCs).Nevertheless,analyzing the material removal process of CMCs with multidirectional structure during UAG is challenging,impeding the progress and improvement of the UAG process.This work examined the impact of ultrasonic vibration on the dynamic mechanical characteristics during processing.Additionally,we experimentally elucidated the material removal mechanism of CMCs during the scratching process under the influence of vertical vibration.The results indicate that the introduction of ultrasonic vibration causes a strain rate effect,resulting in a modification of the material removal mechanism,subsequently impacting the processing quality.Ultrasonic vibration increases the dynamic strength and brittleness of the fibers in CMCs,leading to more cracks at fracture,which changes from the original bending fracture to shear fracture.In addition,ultrasonic vibration can effectively inhibit the impact of scratching depth and anisotropy on the removal mechanism of CMCs,resulting in a more uniform surface of CMCs after processing. 展开更多
关键词 Ceramic-matrix composites Ultrasonic assisted scratching(UAS) Strain rate effect Dynamic mechanical property Material removal mechanism
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Interfacial modification enhancing corrosion resistance of boron nitride nanosheets/Al matrix composites 认领 引用 被引量：1
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作者 Ancang Yang Lishi Ma +6 位作者 Yonghua Duan Xudong Rong Yimin Zhang Lin Zhu Shanju Zheng Mingjun Peng Mengnie Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2026年第1期98-113,共16页
The difference in electrochemical behavior between reinforcement and metal matrix usually damages the corrosion resistance of composites.Herein,the coherent BNNSs-AlN-Al transition interface is creatively constructed ... The difference in electrochemical behavior between reinforcement and metal matrix usually damages the corrosion resistance of composites.Herein,the coherent BNNSs-AlN-Al transition interface is creatively constructed in the Aluminium-Boron nitride nanosheets(Al-BNNSs)system based on reactive sintering.It is demonstrated that BNNSs/Al composites exhibit good corrosion resistance via interfacial modification.The BNNSs-AlN-Al transition interface not only optimizes the interfacial structure of BNNSs/Al composites but also significantly enhances the interface bonding strength.Many low-angle grain boundaries(LAGBs)are induced during extrusion due to the pinning effect of strong bonding transition interface.Besides,density functional theory(DFT)calculation and geometric phase analysis(GPA)were executed to clarify the influence of interface design on the corrosion behavior of BNNSs/Al composites.It is found that the transition interface and LAGBs have strong valence electron constraint ability,thus weakening the galvanic effect in composites.Also,the construction of the transition interface reduces the geometrically necessary dislocations and lattice distortion in the grains of Al matrix,avoiding the decrease of corrosion potential of Al matrix.Ultimately,the coupling effect between LAGB and transition interface not only significantly enhances the ion erosion resistance of composites,but also shifts the corrosion mechanism from intergranular corrosion(IGC)to pitting corrosion(PC)in Al matrix.The current work provides a feasible route for the design of aluminum matrix composites(AMCs)with high corrosion resistance. 展开更多
关键词 BNNSs/Al composites Coherent transition interface Corrosion potential Corrosion resistance
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Mechanical Behavior of Cementitious Composites Reinforced with Nonwoven Fabrics:A Numerical Modeling Study 认领 引用
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作者 Bahareh Ramzikhalesi Ali Rakhsh-Mahpour +1 位作者 Josep Claramunt-Blanes Ernest Bernat-Maso 《Computer Modeling in Engineering & Sciences》 SCIE EI 2026年第5期446-471,共26页
The mechanical behavior of nonwoven fabrics as reinforcement in cementitious composites remains insufficiently explored,particularly from a numerical modeling perspective,despite their growing interest as sustainable ... The mechanical behavior of nonwoven fabrics as reinforcement in cementitious composites remains insufficiently explored,particularly from a numerical modeling perspective,despite their growing interest as sustainable alternatives to conventional textiles.This study presents a simplified,engineering-oriented numerical modeling framework for reproducing the flexural mechanical response of cementitious composites reinforced with flax nonwoven fabric.Four-point bending(flexural)behavior of nonwoven fabric–reinforced cementitious composites was numerically simulated using ANSYS software.The model is developed using Finite Element Analysis(FEA)and incorporates a Representative Volume Element(RVE)approach to account for the heterogeneous fiber–matrix interaction.The required material properties were iteratively calibrated using existing experimental data for three composite configurations comprising 4,5,and 6 layers.The proposed model demonstrated agreement with experimental results within the investigated configurations,achieving normalized root mean square errors(nRMSE)of 5.2%,4.6%,and 2.07%for the respective configurations.Furthermore,correlations between material parameters and geometric factors were identified,providing preliminary insights for estimating model input properties from easily measurable variables.Finally,sensitivity analyses were performed to evaluate the influence of key geometric and material parameters on the structural response,offering valuable insights for the optimized design of nonwoven fabric-reinforced cementitious composites. 展开更多
关键词 Fabric-reinforced cementitious composites flax nonwoven fabric numerical modeling cementitious composites modeling finite element method representative volume element flexural response sensitivity analysis
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The stress transfer mechanism of nacre-like composites under off-axis tensile loading 认领 引用
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作者 Peng Jiang Guangming Xia +5 位作者 Shi Bai Dongfang Xu Jixiang Qi Xun Xiong Xianben Ren Ying Li 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第2期466-472,共7页
Nacre exhibits excellent mechanical properties attributed to the staggered alignment of inorganic minerals and bio-organic materials.This study aims to understand how stress transfers from macro-scale loading conditio... Nacre exhibits excellent mechanical properties attributed to the staggered alignment of inorganic minerals and bio-organic materials.This study aims to understand how stress transfers from macro-scale loading conditions to the staggered architecture,revealing multiple stress transfer modes in nacre-like composites under off-axis tensile loading conditions.We propose an innovative off-axis tension-shear chain model,which predicts the trend of the equivalent modulus.Systematic optimization reveals a counter-intuitive result:the equivalent modulus at a certain angle can be smaller than the equivalent moduli in both principal directions,and this phenomenon differs from the monotonic behavior commonly observed in continuous fiber composite materials. 展开更多
关键词 Composites Load transfer Nacre Bioinspired Architected materials
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Achieving Superior Strength-Ductility Synergy in Bionic Magnesium-Iron Composites by Topological Optimization 认领 引用
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作者 Fan Zhang Hui Fu +3 位作者 Jiahan Liu Yudong Chen Qiuming Peng Tao Zhang 《Rare Metals》 SCIE EI CAS CSCD 2026年第5期363-376,共14页
Magnesium(Mg)-based composites are regarded as promising lightweight materials with significant potential for structural applications.The structure-property relationships of bionic Mg-based composites remain unclear.H... Magnesium(Mg)-based composites are regarded as promising lightweight materials with significant potential for structural applications.The structure-property relationships of bionic Mg-based composites remain unclear.Herein,three honeycomblike Mg-Fe composites are fabricated to uncover the underlying strengthening mechanisms.The dense infiltrated composites show similar element diffusion trends at the interface between the AM50 matrix and the 316L stainless steel(SS)scaffold.The interface composed of theε-Al5FeNi phase and dispersed Al6Mn(Ni)particles(~95 nm average dimension)shows superior hardness(~8.0 GPa)in comparison with the AM50 melt and the 316L SS scaffold.Moreover,the kagome honeycomb(KH)structured composite exhibits superior tensile,compressive,three-point bending,and impact toughness performances compared with other honeycomb-like counterparts.To be specific,the tensile yield strength,compressive yield strength,bending strength,and impact absorption energy of the KH structured composite are 4.4,3.9,1.8,and 7.2 times higher than those of the AM50bulk,respectively.The formation of intermetallic phases in the interfacial layer is attributed to the diffusion of the Al element from the AM50 melt to the 316L SS scaffold.The coherent low-energyα-Mg andε-Al5FeNi phase interface can significantly enhance the metallurgical bonding of immiscible Mg-Fe components,leading to the excellent mechanical properties of the composites.Moreover,the superior strength,ductility,and toughness synergy of the KH structured AM50-316L SS bionic composite are also attributed to a superior stretching-dominated deformation mechanism,alleviating the stress concentration compared with other honeycomb-like counterparts.This work offers a novel pathway for broadening the possibilities for lightweight composites with novel functionalities. 展开更多
关键词 3D printing interface bonding mechanical properties Mg-Fe composites microstructure evolution topological structure
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Real-time control for autoclave curing process of CFRP composites considering tool-part interaction 认领 引用
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作者 Wenyuan TANG Liang HE +4 位作者 Xinyu HUI Jianwen NIU Yingjie XU Rutong YANG Yutong LIU 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第3期667-681,共15页
An integrated real-time control methodology is introduced to mitigate process-induced challenges,namely temperature overshoot,uneven cure,and interfacial shear stress,during the autoclave curing of Carbon Fiber-Reinfo... An integrated real-time control methodology is introduced to mitigate process-induced challenges,namely temperature overshoot,uneven cure,and interfacial shear stress,during the autoclave curing of Carbon Fiber-Reinforced Polymer(CFRP)composites.First,a high-fidelity Finite Element(FE)model incorporating tool-part interaction is developed to reveal the curing process of the composites,wherein the interaction is characterized by friction interface modeling with experimentally measured cure-dependent friction coefficients.The accuracy of FE model is confirmed through experimental tests on a doubly curved T-stiffened composite panel.This validated model then generates a dataset of curing temperature profile and associated defect information,which is used to train a customized Long Short-Term Memory(LSTM)neural network.We culminate in a real-time control framework that actively optimizes the curing process by integrating LSTM-based state prediction with Q-learning-driven decision logic.The optimized thermal profile demonstrates a clear performance enhancement over the traditional multi-dwell approach,achieving marked reductions in temperature difference,Degree of Cure(DoC)difference and tool-part interface shear stress,which provides more insights for intelligent composite manufacturing. 展开更多
关键词 CFRP composites Curing process Neural network Real-time optimization Tool-part interaction
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A Review on Nano Calcium Carbonate Modified Cementitious Composites 认领 引用
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作者 ZHANG Liqing HAN Baoguo +6 位作者 BIAN Mingqiang GUO Mianzhen WANG Yunyang DONG Jingliang LI Xiyou XIONG Xinfu XIONG Jingang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2026年第3期691-716,共26页
Numerous studies have indicated that nano calcium carbonate(NCC)has the potential to enhance the mechanics,durability,and functionality of cementitious composites,thus developing high performance,durable,multifunction... Numerous studies have indicated that nano calcium carbonate(NCC)has the potential to enhance the mechanics,durability,and functionality of cementitious composites,thus developing high performance,durable,multifunctional,and low carbon cementitious composites.This paper reviews the recent progress in NCC modified cementitious composites and provides a comprehensiveness overview of the impact of NCC on the performances of cementitious composites,which includes the fabrication(materials,preparation methods,and curing methods),structures(hydration products and microstructures),and properties(hydration,workability,mechanical properties,durability,and functionality).Moreover,the mechanisms and the challenges as well as future directions of NCC modified cementitious composites are also explored and prospected. 展开更多
关键词 nano calcium carbonate cementitious composites properties mechanisms
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Microstructure,Mechanical Properties and Wear Resistance of(Ti2Al20La+Al3Ti)/Al-7Si Composites 认领 引用
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作者 An Jiazhi Liu Quanfeng +3 位作者 Ding Wanwu Wei Guoli Yu Haicun Yang Chengliang 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第7期1641-1650,共10页
(Ti2Al20La+Al3Ti)/Al-7Si composites rich in Ti2Al20La and Al3Ti reinforcement phases were prepared by the melt blending method.The influence of the addition amount of Al-Ti-La alloy on the microstruc... (Ti2Al20La+Al3Ti)/Al-7Si composites rich in Ti2Al20La and Al3Ti reinforcement phases were prepared by the melt blending method.The influence of the addition amount of Al-Ti-La alloy on the microstructure,mechanical properties,and wear resistance of the composites was analyzed.Results reveal that the(Ti2Al20La+Al3Ti)/Al-7Si composite(adding 10wt%Al-Ti-La alloy into the Al-7Si alloy)is composed of fineα-Al grains,short rod-like eutectic Si,and blocky Al3Ti and Ti2Al20La phases.The tensile strength,elongation,and hardness of the composite are 176.9 MPa,11.62%,and 73.2 HV,increased by 13.4%,57.0%,and 26.2%compared with those of the Al-7Si alloy,respectively.It is suggested that the(Ti2Al20La+Al3Ti)/Al-7Si composite exhibits relatively high plasticity.Furthermore,the wear resistance of the composites is increased by 20.1%.The performance enhancement is attributed to two key mechanisms.One is the formation of Al3Ti transition layer at the interface between the Al3Ti reinforcement phase and the aluminum matrix,which establishes a semi-coherent relationship with Al3Ti phase.The other is the adsorption of element Si by element La within the Ti2Al20La reinforcement phase,leading to Si enrichment at the edges of the Ti2Al20La phase and thereby forming a semi-coherent Si layer. 展开更多
关键词 aluminum matrix composites Al-Ti-La alloys mechanical properties wear resistance
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Modeling prediction of temperature dependent fracture toughness for particle reinforced metal matrix composites 认领 引用
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作者 Pan Dong Guozheng Kang +2 位作者 Xuyao Zhang Weiguo Li Yi He 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第2期350-359,共10页
In this work,incorporating the impact of grain boundary sliding,a theoretical analytical model has been proposed for assessing fracture toughness at different temperatures of particle reinforced metal matrix composite... In this work,incorporating the impact of grain boundary sliding,a theoretical analytical model has been proposed for assessing fracture toughness at different temperatures of particle reinforced metal matrix composites.The model can achieve prediction of fracture toughness in varying temperature conditions by utilizing the yield strength and Young’s modulus of the metal matrix at room temperature,along with readily accessible material parameters.And the predictions have achieved good consistency with the measurements of five composites obtained from other scholars’references.Furthermore,based on the established model,the impact of particle volume fraction and particle size on the fracture toughness of composites,as well as their evolution with temperature were studied within the applicable range of the proposed model.This research not only provides an effective and convenient tool for evaluating the fracture toughness of composites serving in different temperature environments,but also lays the foundation for the strengthening and toughening design of composites. 展开更多
关键词 Particle reinforced metal matrix composites Fracture toughness Temperature dependent Modeling
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Melting Preparation for Tungsten-Doped Graphene/Copper Composites 认领 引用
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作者 Yunzhong Wu Changsheng Xing +7 位作者 Tong Zhang Jiaxu Shuang Deyu Zhang Jie Li Miao Wang Jie Sheng Lidong Wang Weidong Fei 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期638-654,共17页
Melting production plays a pivotal role in the modern copper industry.However,applying this process to fabricate nanocarbon(e.g.,graphene,carbon nanotubes)-reinforced copper matrix composites has remained a long-stand... Melting production plays a pivotal role in the modern copper industry.However,applying this process to fabricate nanocarbon(e.g.,graphene,carbon nanotubes)-reinforced copper matrix composites has remained a long-standing challenge for nearly 2 decades.In this study,a melting preparation strategy for Graphene-Cu(Gr/Cu)composites was developed by introducing tungsten-doped graphene(W-Gr)into molten Cu,effectively improving the wettability and density compatibility between graphene(Gr)and molten Cu.The contact angle between W-Gr and molten Cu decreases to 80.4°,while the density of W-Gr increases to 9.5 g cm-3.W-Gr sheets containing 13 at%and 18 at%tungsten(designated as 13W-Gr and 18W-Gr)disperse uniformly within the Cu matrix.Thermodynamic analysis indicates that W-Gr can spontaneously disperse in molten Cu when the surface area fraction of WC on W-Gr exceeds 45.8%.The ultimate tensile strength(UTS)of 13W-Gr/Cu reaches 152 MPa in the as-cast state and 449 MPa after cold rolling.The electrical conductivity of 13W-Gr/Cu reaches 100.4%international annealed copper standard(IACS)at 20℃,and is 1.5%higher than that of pure Cu at 180℃.This work overcomes the challenges of fabricating Gr/Cu composites via the melting process,provides a viable approach for their large-scale industrial production. 展开更多
关键词 electrical conductivities graphene/copper composites melting preparation tungsten-doped graphene wettability
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Magnetoelastic coupling enhancement induced by a phonon channel in multiferroic composites 认领 引用
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作者 Chunrui Peng Junru Li +4 位作者 Haoran Niu Dongxing Zhang Qiuquan Guo Xiangwei Zhu Jun Yang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第2期402-416,共15页
Enhancing the nonconservative force exerted on the ferromagnetic material is a key strategy for improving magnetoelastic coupling in multiferroic composites.Inspired by the mechanism of pulsed lasers injecting phonons... Enhancing the nonconservative force exerted on the ferromagnetic material is a key strategy for improving magnetoelastic coupling in multiferroic composites.Inspired by the mechanism of pulsed lasers injecting phonons directly into ferromagnetic materials,we propose a method to introduce and amplify phonons by constructing a“phonon channel”.Analyzing the magnon excitation spectrum reveals that magnetoelastic coupling is significantly enhanced with an increasing amplification coefficient Apof nonconservative force in the phonon channel.When the external magnetic field is parallel to the wave vector of the spin wave,the amplitude of magnons in the anti-crossing region exhibits left-right symmetry with respect to the crossing point.In contrast,when the magnetic field is perpendicular,the symmetry becomes up-down.Introducing a coupling layer into the multiferroic composites provides a viable approach to realizing the phonon channel.Taking a multiferroic composite structure consisting of polyvinylidene fluoride and yttrium iron garnet as an example,we compare the electrical and acoustic properties of multiferroic composites with and without a coupling layer in the microwave frequency band.The enhancement of electrical and acoustic properties confirms the effectiveness of the phonon channel in multiferroic composites. 展开更多
关键词 Magnetoelastic coupling Nonconservative force Piezomagnetic effect Acoustic impedance Multiferroic composites
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Discontinuous ablation behavior of four-directional dual-matrix C/C composites under dual-pulse solid rocket motors 认领 引用
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作者 Wei Lianfeng Wang Running +2 位作者 Zhang Jiaping Li Kezhi Cui Hong 《新型炭材料（中英文）》 SCIE EI CSCD 北大核心 2026年第3期707-720,共14页
Four-directional dual-matrix C/C composites were fabricated from PAN-based carbon fibers using a combined approach of soft-hard hybrid weaving preform molding,chemical vapor infiltration(CVI)of pyrolytic carbon(PyC),h... Four-directional dual-matrix C/C composites were fabricated from PAN-based carbon fibers using a combined approach of soft-hard hybrid weaving preform molding,chemical vapor infiltration(CVI)of pyrolytic carbon(PyC),high pressure impregnation and carbonization of pitch-derived carbon.The ablation resistance of the composites was evaluated by testing in a dual-pulse solid rocket motor,and their ablation behavior was investigated.The carbon rods formed by twisting and carbonizing fiber bundles,exhibited a hexagonal cross-section,surrounded by a dense PyC“wall”structure formed during the CVI process.The linear ablation rates of the composites after pulse Ⅰ and pulse Ⅱ were 0.068 mm/s and 0.113 mm/s,respectively.A cellular-like PyC layer and nanowire structures were deposited on the surface of the throat convergent section during the post-combustion cooling phase,while cracks and delamination occurred on and within the divergent section.The ablation of C/C composites under these conditions was a complex multi-mechanism process,including ultra-high temperatures,high-speed gas scouring,oxygen-containing thermochemical ablation,and thermal shock.This work elucidates the ablation behaviors of C/C composites under dual-pulse conditions and provides technical guidance and a theoretical basis for designing and fabricating C/C composites for extreme ablation environments. 展开更多
关键词 C/C composites Ablation Dual-pulse solid rocket motor Microstructure evolution Four-directional dualmatrix
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Effect of transition layer of(AlCoCrFeNi2.1)p/6061 Al matrix composites on the mechanical properties and corrosion performance 认领 引用
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作者 LI Meng-jia GAN Yu-hua +6 位作者 SHI Yun-jia TAO Jia-quan ZHANG Guo-peng WANG Jing HUANG Hai WANG Jie-fang CAI Bin 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第3期1110-1128,共19页
(AlCoCrFeNi2.1)p/6061 Al matrix composites were prepared by vacuum hot pressing sintering,and the mechanical properties and corrosion performance were investigated.Microstructural characterization reveals that a ri... (AlCoCrFeNi2.1)p/6061 Al matrix composites were prepared by vacuum hot pressing sintering,and the mechanical properties and corrosion performance were investigated.Microstructural characterization reveals that a ring like transition layer formed between the high-entropy alloy particle(HEAp)and the 6061 Al matrix,there were some monoclinic structural phases distributed along the outside of the transition layer,and these are presumed to be Al9(CoCrFeNi)2.With increasing sintering temperature,the hardness,densification and yield strength of composites improved.Compression morphology indicates that the existence of the transition layer is necessary to effectively prevent the expansion of crack in the 6061 Al,resulting in composites that exhibit good plasticity.Galvanic coupling corrosion formed when the composites were tested in simulated seawater,the boundary between the transition layer and the 6061 Al matrix was preferentially corroded to form a ring-shaped corrosion pit,and the thickness of the transition layer would affect the ring-shaped corrosion pit.It could be controlled within a certain thickness by adjusting the sintering temperature of the composites to improve the corrosion resistance.These findings demonstrate the critical role of the transition layer in balancing mechanical properties and corrosion resistance of HEAp-reinforced aluminum composites. 展开更多
关键词 high-entropy alloy particles aluminum matrix composites compression properties corrosion resistance
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On AlNP/Mg-Zn-Cu cast composites with low expansion and high thermal conductivity 认领 引用
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作者 Shu-sen Wu Lu Chen +2 位作者 Shu-lin Lü Wei Guo Jian-yu Li 《China Foundry》 SCIE EI CAS CSCD 2026年第1期101-107,共7页
There is an urgent need to develop magnesium-matrix materials that exhibit both high thermal conductivity and low thermal expansion to ensure compatibility with chips.This study aims to develop a Mg-Zn-Cu alloy with h... There is an urgent need to develop magnesium-matrix materials that exhibit both high thermal conductivity and low thermal expansion to ensure compatibility with chips.This study aims to develop a Mg-Zn-Cu alloy with high thermal conductivity.Furthermore,it explores the preparation of AlNP/Mg-Zn-Cu composites featuring low coefficients of thermal expansion.The stir casting method was utilized to fabricate the composites and an investigation was conducted to examine their microstructure and thermal properties.Results indicate that the addition of AlNPreduces the thermal expansion coefficient while maintaining relatively high thermal conductivity.Specifically,the AlNP/Mg-0.5Zn-0.5Cu composite with 30wt.%AlNPachieves a thermal conductivity of 132.7 W·m-1·K-1and a thermal expansion coefficient of 18.5×10-6K-1,rendering it suitable for electronic packaging applications where thermal management is critical. 展开更多
关键词 thermal expansion thermal conductivity magnesium-matrix composites Mg-Zn-Cu alloy
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A multi-scale analysis method considering the realistic fiber structure for the nonlinear mechanical behavior of 3D needled twill composites 认领 引用
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作者 Jianwei Qiao Jingran Ge +2 位作者 Zengfei Liu Qi Zhang Jun Liang 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2026年第4期303-326,共24页
Three-dimensional needled twill composites have an extremely complex fiber structure,making investigating the nonlinear mechanical behavior challenging.This paper develops a multi-scale analysis method considering rea... Three-dimensional needled twill composites have an extremely complex fiber structure,making investigating the nonlinear mechanical behavior challenging.This paper develops a multi-scale analysis method considering realistic fiber structure to predict the behavior.With the method,the damage evolution processes of different typical regions in the composites are analyzed in detail.Under in-plane loading,there is a platform area in the unneedled area,and the damage of the matrix and felt is distributed along the 45°direction in the plane.In the single-needled area,the damage of the matrix and felt occurs around the needled hole and expands perpendicularly to the load.The yarns in different typical areas primarily exhibit transverse damage,concentrated in the interweaving areas.Under out-of-plane loading,the damage of the yarn and matrix is distributed on the upper and lower surfaces,with the felt showing no damage.In addition,a periodic unit cell model including different typical areas is built to analyze the nonlinear mechanical behavior of composites.The stress-strain curves predicted by the model are aligned well with the experimental results.The developed method effectively predicts the nonlinear mechanical behavior of composites,captures the damage evolution mode of different typical areas,and provides guidance for the application of composites. 展开更多
关键词 Carbon fibers Nonlinear behavior Finite element analysis Needled composites
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Rotation friction extrusion process towards high-performance Mg-Li matrix composites enhanced by FeCoNiCrCu high entropy alloy 认领 引用
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作者 Yuqing MAO Jinkai WANG +5 位作者 Qing HUANG Tengfei DU Shaopeng LIU Zhiwei QIN Xiao SONG Liming KE 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第4期668-679,共12页
To pursue wide applications of Mg-Li alloys in aerospace field,bringing in reinforcement phases reasonably and manufacturing efficiently have become paramount.Herein,a novel rotation friction extrusion process was pro... To pursue wide applications of Mg-Li alloys in aerospace field,bringing in reinforcement phases reasonably and manufacturing efficiently have become paramount.Herein,a novel rotation friction extrusion process was proposed to fabricate Fe Co Ni Cr Cu high entropy alloy reinforced Mg-Li matrix composites,which were enhanced by newly formed nano-sized Al Cu Mg phase particles.The grain size of Mg-Li matrix composites was 4.19μm.Meanwhile,a 69.03 nm thickness amorphous layer was obtained,which was composed of amorphous and nanocrystalline structure.The maximum tensile strength reached 201.3 MPa,which was improved by 43.9%compared with LAZ933 Mg-Li alloy.It can be attributed to fine grain strengthening and dispersion strengthening,which resulted from dynamic recrystallization in Mg-Li alloy and Cu segregation from the interior of high entropy alloy.This work shows a novel processing and original reinforcement phase,providing a peculiar way to fabricate Mg-Li matrix composites. 展开更多
关键词 High entropy alloy Mechanical properties Mg-Li matrix composites Rotation friction extrusion Strengthening mechanism
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Graphene-based composites as the cathodes for high-performance aqueous zinc-ion batteries:Applications and perspectives 认领 引用
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作者 Yifei Pei Yong Liu +9 位作者 Chunyang Kong Zhihui Jia Kaijia Feng Yibo Xing Mingliang He Xiujie Gao Ruxia Liu Xianming Liu Kunming Pan Qiaobao Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第4期128-148,共21页
Rechargeable aqueous zinc-ion batteries(AZIBs)have received considerable attention in recent years because of their high safety,low cost,and environmental friendliness.The properties of cathode materials are vital for... Rechargeable aqueous zinc-ion batteries(AZIBs)have received considerable attention in recent years because of their high safety,low cost,and environmental friendliness.The properties of cathode materials are vital for the further development of AZIBs.Graphene-based composite materials have emerged as promising cathode materials for AZIBs on account of their superior electrical conductivity and excellent electrochemical performance.Considering the rapidly progress of graphene-based composites,we comprehensively summarize the recent progress in the applications of graphene-based composites as the cathode in AZIBs.Furthermore,the relationships between their synthetic methods,nano-and microstructures,and electrochemical performance are systematically concluded and discussed.Finally,rational suggestions and prospects for the future development of graphene-based composites are also proposed. 展开更多
关键词 Aqueous zinc-ion batteries Cathode materials Graphene-based composites Applications Electrochemical performance
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Ultrastrong and ductile hierarchical heterostructured titanium composites from room to high temperatures 认领 引用
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作者 Shaolong Li Shufeng Li +18 位作者 Huiying Liu Lei Liu Shaodi Wang Dongxu Hui Jie Yan Rui zhou Dingbo Tao Wenfei Huang Jianbo Gao Xiaodong Hou Xin Zhang Bo Li Zhimao Wang Gang Li Junhua Luan Junko Umeda Katsuyoshi Kondoh Philip J.Withers Yuntian Zhu 《Advanced Powder Materials》 EI CAS CSCD 2026年第2期56-64,共9页
Titanium matrix composites(TMCs)offer significant enhancements in strength and heat resistance while pre-serving the low-density characteristic of advanced lightweight titanium alloys.However,ultra-strong,high-tempera... Titanium matrix composites(TMCs)offer significant enhancements in strength and heat resistance while pre-serving the low-density characteristic of advanced lightweight titanium alloys.However,ultra-strong,high-temperature TMCs are typically brittle at room temperature.Here,we overcome this limitation reporting a novel hierarchical,heterostructured design that achieving a 9.5% ductility-exceeding that of the TA15 matrix alloy-along with a remarkable tensile strength of nearly 1.4 GPa at room temperature and 700 MPa at 600℃.This design forms hard,fine-grained regions homogeneously embedded within a soft,coarse-grained matrix.The hierarchical architecture facilitates the emergence of hetero-deformation-induced(HDI)stresses and strain partitioning,thereby enhancing strain hardening and dislocation activity.Our design strategy provides a pathway to achieving not only an optimal combination of strength-ductility at room-temperature but also exceptional high-temperature resistance. 展开更多
关键词 Heterostructure Powder metallurgy Titanium matrix composites Strengthening-toughening mechanism Mechanical properties
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6061 Al/Cu layered composites with high strength and well interfacial bonding prepared by accumulative roll bonding 认领 引用
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作者 Ling OU Yan-jun XIAO +2 位作者 Cai-he FAN Jun-wei LIU Wu-dan MA 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2026年第4期1039-1054,共16页
6061 Al/Cu layered composites were fabricated by accumulative roll bonding(ARB).The microstructural evolution was examined using scanning electron microscopy,electron backscatter diffraction,and transmission electron ... 6061 Al/Cu layered composites were fabricated by accumulative roll bonding(ARB).The microstructural evolution was examined using scanning electron microscopy,electron backscatter diffraction,and transmission electron microscopy.After seven ARB cycles,the tensile strength increased to 416 MPa,whereas the elongation decreased to 6.7%.The strength enhancement is mainly attributed to work hardening and grain refinement.No brittle intermetallic compounds(IMCs)were detected at the interface,and interfacial bonding improved with additional ARB cycles.The small hardness difference between Al and Cu promoted uniform plastic deformation across layers,enhancing interfacial cohesion.However,strain localization due to different work hardening responses of Al and Cu led to pronounced shear band formation after seven ARB cycles,reducing the plasticity. 展开更多
关键词 accumulative roll bonding(ARB) layered composites mechanical properties interfacial bonding
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