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Corrosion behavior of Ni-based coating containing spherical tungsten carbides in hydrochloric acid solution 认领 引用 被引量：3
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作者 Shan-shan Liu Hai-yan Chen +3 位作者 Xuan Zhao Li Fan Xiao-ming Guo Yan-sheng Yin 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2019年第2期191-199,共9页
A Ni-based alloy coating with 30 wt.%spherical fungsten carbide particles was prepared through plasma transferred arc welding on 42CrMo steel.The composition and microstructure of the coati ng were examined through X-... A Ni-based alloy coating with 30 wt.%spherical fungsten carbide particles was prepared through plasma transferred arc welding on 42CrMo steel.The composition and microstructure of the coati ng were examined through X-ray diffraction and scanning electron microscopy with energy-dispersive spectrometry.The corrosion behaviors of the coating compared to the Ni coating without tungsten carbide particles and to the bare substrate in a0.5 mol/L HC1 solution were presented through polarization curves,electrochemical impedance spectroscopy(EIS)measurements and long-term immersion tests.The results demonstrated that the composite coating microstructure comprised Ni matrix,Ni-rich phase,tungsten carbide particles,W-rich phase and Cr-rich phase.The polarization curves and EIS measurements presented that a passivation film,which mainly included Ni,Cr,Fe and W oxides,was formed in the composite coating that protected the substrate from corrosion by HC1 solution.In the immersion tests,a micro-galvanic reaction at the new-formed phases and Ni matrix interface caused severe pit corrosion and Ni matrix consumption.The debonding of Ni-rich and W-rich phases could be observed with the immersion time extension.The tungsten carbide particles and Cr-rich phase were still attached on the surface for up to 30 days. 展开更多
关键词 Plasma transferred welding Spherical tungsten carbide Ni-based coating Corrosion resistance Electrochemical impedanee spectroscopy
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Effect of molybdenum on the microstructure and corrosive wear resistance of laser clad Ni-based coatings 认领 引用 被引量：2
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作者 张平 原津萍 +3 位作者 盂令东 赵军军 乔玉林 刘操 《China Welding》 EI CAS 2010年第1期43-47,共5页
Five kinds of Ni-based coatings with 0 wt% , 2. 5 wt% , 5.0 wt% , 7.5 wt% and 10. 0 wt% molybdenum were prepared on 45CrNi steel plates by using laser cladding technique. The effect of Mo on the microstructure of Ni-b... Five kinds of Ni-based coatings with 0 wt% , 2. 5 wt% , 5.0 wt% , 7.5 wt% and 10. 0 wt% molybdenum were prepared on 45CrNi steel plates by using laser cladding technique. The effect of Mo on the microstructure of Ni-based coatings was investigated by using scanning electron microscopy. The corrosive wear resistance and the corrosion resistance of five coatings were tested. The results show that the corrosive wear resistance of the coating with 5.0 wt% Mo is better than those of other coatings. During the corrosive wear process, the corrosion and wear effects are combined. The corrosive wear resistance is closely related to the microstructure of the coating. 展开更多
关键词 laser cladding Ni-based alloy corrosive wear
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Evolution behavior of phase and performance in Ni-based coating layer based on high temperature thermal field 认领 引用 被引量：5
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作者 Qin Jian Huang Junlan +3 位作者 Long Weimin Yu Deqing Wu Mingfang Wang Yuchang 《China Welding》 CAS 2020年第4期25-32,共8页
Effect of post-welding heat treatment on the microstructure and properties of BNi-2 brazing coating was analyzed. The phase transformation in the heat treatment process was analyzed by high temperature metallographic ... Effect of post-welding heat treatment on the microstructure and properties of BNi-2 brazing coating was analyzed. The phase transformation in the heat treatment process was analyzed by high temperature metallographic microscope, scanning electron microscope and X-ray diffraction, and the microhardness after the post heat treatment was tested by microhardness tester. The results show that the microstructure of brazing BNi-2 brazing coating is mainly CrB phase, Ni solid solution phase and eutectic phase of Ni3B and Ni3Si. After brazing,the overall hardness value is higher, generally higher than 510 HV, and the microhardness in some areas is higher than 700 HV. After quenching, the solid solution phase of Ni increased, and the eutectic phase of Ni and Ni3Si decreased, leading to the softening of the brazing coating, the area whose microhardness in the range of 342 HV–454 HV increased. After tempering the brazed coating samples, the eutectic phases of Ni and Ni3Si grew and the hardness recovered, but the overall hardness distribution was still lower than the brazing one. The results of the brazing post-heat treatment test show that the post-welding heat treatment will bring adverse effects on the hardness distribution of the coating, which may affect the wear resistance of the coating. 展开更多
关键词 brazing coating BNi-2 post welding heat treatment Micro-hardness
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Hydrothermal growth of Ni-based coatings on copper substrates 认领 引用 被引量：1
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作者 Fang Liu Yong Zhang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2012年第3期259-265,共7页
Ni-based coatings were deposited on copper substrates by a hydrothermal approach. The results showed that a Ni-based cellular microstructure was bridged by ＂fiber-like＂ products. A high microhardness of Hv 856 was a... Ni-based coatings were deposited on copper substrates by a hydrothermal approach. The results showed that a Ni-based cellular microstructure was bridged by ＂fiber-like＂ products. A high microhardness of Hv 856 was achieved after 400℃ heat treatment, which is nine times that of copper substrates （Hv 95）. Nucleation, growth, and fusion of Ni atoms along the linear direction, induced by a linear-type cit- rate-metal structural ＂molecule template＂, led to in-situ growth of Ni-based fibers between cellular microspheres. After 400℃ heat treatment, the precipitation of NiP and Ni3P hard phases contributed to the high microhardness of Ni-based coatings. 展开更多
关键词 nickel-based coatings fibers hydrothermal synthesis copper microhardness
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Wear and Friction Properties of Electrodeposited Ni-Based Coatings Subject to Nano-enhanced Lubricant and Composite Coating 认领 引用 被引量：3
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作者 Rizwan Bajwa Zulfiqar Khan +2 位作者 H.Nazir Vivek Chacko Adil Saeed 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2016年第10期902-910,共9页
This paper presents research findings on the tribological performance of electrodeposited coatings subject to nano-lubricants with the addition of nano-Al2O3 and graphene and Niano-Al2O3 composite coatings. Electrodep... This paper presents research findings on the tribological performance of electrodeposited coatings subject to nano-lubricants with the addition of nano-Al2O3 and graphene and Niano-Al2O3 composite coatings. Electrodeposited coatings were produced by using a pulse electrodeposition method. Tribological experiments were conducted by using a linear reciprocating ball on fiat sliding tribometer. Experimental results confirmed that the wear and friction resistance properties were significantly enhanced by doping of nano-effects in the lubricating oil and composite coating. The addition of Al2O3 nanoparticles in the lubricating oil showed the best tribological properties, followed by Ni-Al2O3 composite coatings and nano-oil with graphene. The surface morphology and microstructure of electrodeposited coatings were examined by scanning electron microscopy, energy-dispersive spectroscopy and X-ray diffraction. The wear mechanisms of these coatings subjected to tribological testing were investigated by post-test surface analyses. This research provides a novel approach to design durable nano-coatings for tribological applications in various industries such as automotive, aerospace, locomotive and renewable energy technologies. 展开更多
关键词 Tribology Nanoparticles Graphene Nano-additives Nano-coatings
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Effects of sintering temperature on the microstructural evolution and wear behavior of WCp reinforced Ni-based coatings 认领 引用
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作者 Chuan-hui Chen Yang Bai Xu-chu Ye 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2014年第12期1254-1262,共9页
This article focuses on the microstructural evolution and wear behavior of 50wt%WC reinforced Ni-based composites prepared onto 304 stainless steel substrates by vacuum sintering at different sintering temperatures. T... This article focuses on the microstructural evolution and wear behavior of 50wt%WC reinforced Ni-based composites prepared onto 304 stainless steel substrates by vacuum sintering at different sintering temperatures. The microstructure and chemical composition of the coatings were investigated by X-ray diffraction （XRD）, differential thermal analysis （DTA）, scanning and transmission electron microscopy （SEM and TEM） equipped with energy-dispersive X-ray spectroscopy （EDS）. The wear resistance of the coatings was tested by thrust washer testing. The mechanisms of the decomposition, dissolution, and precipitation of primary carbides, and their influences on the wear resistance have been discussed. The results indicate that the coating sintered at 1175℃ is composed of fine WC particles, coarse M6C （M=Ni, Fe, Co, etc.） carbides, and discrete borides dispersed in solid solution. Upon increasing the sintering temperature to 1225℃, the microstructure reveals few incompletely dissolved WC particles trapped in larger M6C, Cr-rich lamellar M23C6, and M3C2 in the austenite matrix. M23C6 and M3C2 precipitates are formed in both the γ/M6C grain boundary and the matrix. These large-sized and lamellar brittle phases tend to weaken the wear resistance of the composite coatings. The wear behavior is controlled simultaneously by both abrasive wear and adhesive wear. Among them, abrasive wear plays a major role in the wear process of the coating sintered at 1175℃, while the effect of adhesive wear is predominant in the coating sintered at 1225℃. 展开更多
关键词 particle reinforced composites composite coatings tungsten carbide microstructural evolution wear behavior sintering temperature
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Characterization of the interfacial structure and fracture behavior of in situ synthesized ceramics to reinforce Ni-based composite coatings 认领 引用 被引量：1
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作者 Yuxin Wang Yanchun Dong +5 位作者 Yun Tian Jianing Liu Dongyao Zhang Chunli Qiu Yanqi Zhao Yong Yang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第5期11-25,共15页
This work used the in-situ synthesis of molten-state nitride ceramic phase-reinforced Ni-based alloy coat-ings,aiming to improve the phase-interface bonding through the interdependent co-solidification be-tween molten... This work used the in-situ synthesis of molten-state nitride ceramic phase-reinforced Ni-based alloy coat-ings,aiming to improve the phase-interface bonding through the interdependent co-solidification be-tween molten droplets.The XRD was used to analyze the physical phases of the composite coatings.The microstructure and phase-interface structure were characterized in detail by combining SEM,TEM,HRTEM,FFT,and SAED techniques.Microhardness tester and microforce microhardness tester were em-ployed to measure the surface hardness and elastic modulus of the composite coatings.The fracture be-havior of the composite coatings was characterized by observing the fracture morphology of the coatings using SEM combined with the EDS technique.It was found that the formation mechanisms of inter-facial misfit dislocation assistance,lattice distortion,aggregation of stacking faults,and specific growth orientation between theγ-Ni matrix phase and each ceramic phase in NiCrBSi-TiCrN composite coat-ings improved the lattice matching between the two-phase interface,which resulted in the formation of atomically corresponding coherent lattice relations and stepped interfacial semi-coherent lattice relations,and enhanced the degree of phase-interface bonding.On this basis,the composite coatings with high Cr content further inhibited the expansion of interphase penetration cracks due to the existence of Cr-rich zones at the phase interface,thus exhibiting high fracture toughness.This work provides new opinions on the improvement of phase-interface bonding and composition design of Ni-based composite coatings. 展开更多
关键词 In situ synthesis NiCrBSi-TiCrN composite coating Phase interface Fracture behavior
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Stress-rupture behavior of a Ni-based Re-containing single crystal superalloy in[001]and[111]orientations at 1100℃ 认领 引用 被引量：1
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作者 Guang-lei Wang Dong-qing Qi +1 位作者 Jin-lai Liu Ji-de Liu 《China Foundry》 SCIE EI CAS CSCD 2026年第2期179-185,共7页
Turbine blades,due to their intricate geometry,are exposed to multiaxial stresses during operation.Consequently,it is imperative to examine the anisotropy of their stress-rupture behavior across various testing scenar... Turbine blades,due to their intricate geometry,are exposed to multiaxial stresses during operation.Consequently,it is imperative to examine the anisotropy of their stress-rupture behavior across various testing scenarios,particularly under high-temperature conditions.Stress-rupture behavior of a Ni-based single crystal superalloy was investigated under a load varying from 100 MPa to 137 MPa at 1,100℃ for both[001]-and[111]-orientated specimens.Results demonstrate that the rupture behavior of[111]-orientated specimens exhibits obviously higher sensitive to applied stress compared to[001]-orientated specimens.This difference is primarily attributed to the orientation dependentγ'coarsening behavior and distinct dislocation interactions atγ/γ'interfaces.In[001]-oriented specimens,plate-likeγ/γ'rafts rapidly form alongside well-developed interfacial dislocation networks,where theγ/γ'misfit stress dominates the microstructural evolution.In contrast,the[111]-orientated specimens exhibit retained,coarsenedγ'precipitates embedded within theγmatrix,accompanied by poorly developed interfacial dislocation networks. 展开更多
关键词 Ni-based single crystal superalloy stress-rupture behavior deformation mechanism stress dependence orientation dependence
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Nanostructure-dependent colouration efficiency of electrochromic coatings using 0D,1D,and 2D WO3 for smart windows 认领 引用 被引量：2
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作者 Mahnaz Dadkhah Md Julker Nine +2 位作者 Kosala Purasinhala Gurleen Singh Sandhu Dusan Losic 《Nano Materials Science》 EI CAS CSCD 2026年第2期255-263,共9页
Towards the development of highly efficient electrochromic coatings,the crystallinity,morphology(e.g.size and shape)of electrochromic nanomaterials,and their charge insertion capacities play a significant role.Herein,... Towards the development of highly efficient electrochromic coatings,the crystallinity,morphology(e.g.size and shape)of electrochromic nanomaterials,and their charge insertion capacities play a significant role.Herein,we report the structure-dependent colouration effciency in electrochromic coatings based on the use of 0D,1D and 2D tungsten trioxide(WO3)nanostructures.A series of WO3with different nanostructures were prepared and used as working electrodes to fabricate electrochromic devices for smart windows applications.Facile spray coating was applied on fluorine-doped tin oxide(FTO)substrate to make~70%transparent working electrodes to investigate their charge insertion capacities,electrochromic active surface area,and colouration efficiency.Results showed that the 2D WO3nanoflakes displayed the highest diffusion coefficient for the intercalation of 1.52×10-10cm2/s with an increased electrochemical active surface area of 25.10 mF/cm2,a large modulation of optical reflectance(42.63%)with 3.79 s shorter response time for bleaching and a greater colouration efficiency(CE)value(89.29 cm2/C)at 700 nm compared to the CE value for 1D WO3(of 22 cm2/C)and 0D WO3(8 cm2/C).The outcome of this study provides a new insight and valuable contribution to design an efficient electrochromic coating by controlling and optimising the nanostructures of selective electrochromic materials. 展开更多
关键词 Electrochromic devices Smart window WO3 nanostructures Colouration efficiency Spray coating
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High-Performance Perovskite Solar Cells and Modules via Slot-Die Coating:Engineering Advances,Photoluminescence Insights,and Future Perspectives 认领 引用 被引量：1
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作者 Li’an Peng Yonglong Mao +4 位作者 Yuxia Yin Yuxin Chen Teng Zhang Shengye Jin Jun Zhang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第9期326-371,共46页
Slot-die coating has solidified its role as the preeminent industrial-scale deposition technique for perovskite photovoltaics,combining exceptional material utilization,direct compatibility with roll-to-roll productio... Slot-die coating has solidified its role as the preeminent industrial-scale deposition technique for perovskite photovoltaics,combining exceptional material utilization,direct compatibility with roll-to-roll production,and high-throughput capability.This review comprehensively surveys recent advances in slot-die-coated perovskite solar cells and modules,with a focused analysis on the governing principles behind the structure–property–performance relationship.We first deconstruct how coating methodologies—including one-step,two-step,and hybrid processes—dictate film morphology and crystalline quality.We then elaborate on perovskite ink engineering,emphasizing the critical role played by solvent selection and functional additives in controlling nucleation kinetics and crystal growth during large-area deposition.Furthermore,we examine innovative interface modulation strategies that enhance film integrity,suppress defects,and mitigate ion migration.A key distinctive feature of this review is its emphasis on advanced photoluminescence(PL)characterization techniques—such as in situ PL,PL imaging,and time-resolved PL—which provide unparalleled insights into crystallization pathways,defect distribution,and charge carrier dynamics.These tools are indispensable for mechanistic decoding and rational optimization of the slot-die process.Finally,we outline pressing research directions,highlighting the necessity to overcome persistent challenges in operational stability,efficiency–stability trade-offs,the establishment of unified stability assessment protocols,and manufacturing reproducibility to ultimately bridge the laboratory-to-fab gap and accelerate the commercialization of slot-die-coated perovskite solar modules. 展开更多
关键词 Slot-die coating Perovskite photovoltaics Process–structure–property relationship Photoluminescence Laboratory-tofab transition
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Effect of Substrate Micro-arc Oxidation Pretreatment on Microstructure and High-Temperature Oxidation Resistance of Si-Cr-Ti-Zr Coating on Ta12W Alloy 认领 引用 被引量：1
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作者 Yang Fan Chang Jianxiu +2 位作者 Wang Xin Li Hongzhan Yan Peng 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第1期92-104,共13页
To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretre... To mitigate the impact of interdiffusion reactions between the silicide slurry and Ta12W alloy substrate during vacuum sintering process on the oxidation resistance of the silicide coating,a micro-arc oxidation pretreatment was employed to construct a Ta2O5ceramic layer on the Ta12W alloy surface.Subsequently,a slurry spraying-vacuum sintering method was used to prepare a Si-Cr-Ti-Zr coating on the pretreated substrate.Comparative studies were conducted on the microstructure,phase composition,and isothermal oxidation resistance(at 1600℃)of the as-prepared coatings with and without the micro-arc oxidation ceramic layer.The results show that the Ta2O5layer prepared at 400 V is more continuous and has smaller pores than that prepared at 350 V.After microarc oxidation pretreatment,the Si-Cr-Ti-Zr coating on Ta12W alloy consists of three distinct layers:an upper layer dominated by Ti5Si3,Ta5Si3,and ZrSi;a middle layer dominated by TaSi2;a coating/substrate interfacial reaction layer dominated by Ta5Si3.Both the Si-Cr-Ti-Zr coatings with and without the Ta2O5ceramic layer do not fail after isothermal oxidation at 1600℃for 5 h.Notably,the addition of the Ta2O5 ceramic layer reduces the high-temperature oxidation rate of the coating. 展开更多
关键词 tantalum-tungsten alloy silicide coating micro-arc oxidation reaction formation mechanism high-temperature oxidation
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Transparent UV-cured Phosphorus/Nitrogen Hybrid Coating for Simultaneously Enhancing Flame Retardancy and Surface Hardness of Polycarbonate 认领 引用
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作者 Jing Gao Liang Chen +6 位作者 Liang-Yuan Qi Su-Hong Li Yuan Hu Xin Wang Lian-Min Ji Ying-Jian Wang Wei-Yi Xing 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第8期2670-2680,I0017,共11页
The flame-retardant monomer PG(P)was synthesized from diethylphosphinic acid and glycidyl methacrylate(GMA).Simultaneously,the phosphorus-containing flame-retardant monomer,TAEP(T),was synthesized from phosphorus oxyc... The flame-retardant monomer PG(P)was synthesized from diethylphosphinic acid and glycidyl methacrylate(GMA).Simultaneously,the phosphorus-containing flame-retardant monomer,TAEP(T),was synthesized from phosphorus oxychloride and 2-hydroxyethyl acrylate.A 50μm thick transparent UV-cured coating,designated MAAR-P8T4,was successfully constructed on 0.5 mm thick polycarbonate(PC)films by blending PG and TAEP with melamine acrylate resin(MAAR).The fabricated coating demonstrated a high transmittance of 91.9%in the visible-light spectrum.The incorporation of monofunctional PG effectively regulated the system viscosity and mitigated curing shrinkage stress.Furthermore,the synergistic action of phosphorus in different valence states and nitrogen from MAAR imparted a dual gas-phase-condensed phase flameretardant mechanism to the coating,enabling the PC substrate to attain a V-0 rating in the UL-94 vertical burning test.This research indicates that the MAAR-P8T4 coating engineered via molecular design and component optimization concurrently overcomes the limitations of PC,namely its low surface hardness and inherent flammability.A straightforward and efficient preparation strategy provides a practical approach for transparent flame-retardant coatings for electronic and electrical applications. 展开更多
关键词 Synergistic flame retardant system UV-curable coatings Transparent coating Flame retardancy Polycarbonate
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Rational Design of Multifunctional Nano–Architected Coatings for Bipolar Plates in Proton Exchange Membrane Fuel Cells 认领 引用
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作者 Shijie Li Shuai Xiao +10 位作者 Xin Yong Siyu Qin Jianbang Ge Zhe Wang Zhijing Yu Xinrui Wang Yi Lu Xiaodong Chen Xuefeng Zhang Zhenghao Pu Wei Lin 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期78-102,共25页
Proton exchange membrane fuel cells(PEMFCs)require advanced bipolar plate coatings to enhance efficiency,durability,and commercialization potential.This review presents a systematic framework for evaluating and design... Proton exchange membrane fuel cells(PEMFCs)require advanced bipolar plate coatings to enhance efficiency,durability,and commercialization potential.This review presents a systematic framework for evaluating and designing bipolar plate coatings,integrating material selection,performance metrics,deposition techniques,and future innovation strategies.Four primary coating categories,namely carbon,metallic,compound,and conductive polymers,are assessed within this framework,considering electrical conductivity,interfacial contact resistance,corrosion resistance,mechanical stability,and hydrophobicity.The review also examines deposition scalability and trade-offs,highlighting the potential of artificial intelligence-driven material design and carbon-ceramic-polymer hybrid architectures to overcome current limitations.By synthesizing existing knowledge into an overarching design and evaluation framework,this work guides the development of multifunctional coatings that balance conductivity,durability,and cost-effectiveness,accelerating PEMFCs'advancement and sustainable energy adoption. 展开更多
关键词 bipolar plate coatings coating deposition corrosion resistance interfacial contact resistance PEMFCs
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Stray grains evolution and high-temperature stress rupture behavior of crystallographic lamellar microstructure in Ni-based superalloys prepared by laser powder bed fusion 认领 引用
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作者 Peng Wang Jing-jing Liang +10 位作者 Yu-ping Zhu Wei Song Qiao-lei Li Yi Qiu Ying-ju Li Yi-zhou Zhou Han-lin Liao Lei Shi Li-ming Lei Xiao-feng Sun Jin-guo Li 《China Foundry》 SCIE EI CAS CSCD 2026年第1期45-54,共10页
The unique crystallographic lamellar microstructure(CLM) Ni-based superalloys fabricated by laser powder bed fusion(LPBF) exhibits excellent tensile properties.This study aims to investigate CLM's high-temperature... The unique crystallographic lamellar microstructure(CLM) Ni-based superalloys fabricated by laser powder bed fusion(LPBF) exhibits excellent tensile properties.This study aims to investigate CLM's high-temperature stress rupture behavior and use these findings to improve the additive manufacturing process.The result shows that the high temperature-induced intergranular fracture in grain region is responsible for stress rupture failure under both conditions of 760 ℃/780 MPa and 980 ℃/260 MPa.Among them,the sub-grain boundary fracture occurs only under high temperature and low stress,980 ℃/260 MPa.Due to the severe intergranular fracture induced by stray grains,the stress rupture life is very low under both conditions.According to the finite element simulation,the formation of stray grains stems from the unstable heat flow within the melt pool during the process.In addition,the shorter stress rupture lifetime does not excite a more pronounced dislocation network around the γ′ phase.However,the deformation twins can still be activated inside the grains,so it has excellent plasticity under both test conditions.Finally,this work indicates that the future optimization of CLM by LPBF should focus on eliminating of high-angle grain boundaries in grains. 展开更多
关键词 crystallographic lamellar microstructure Ni-based superalloys additive manufacturing mechanical properties
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Characteristics and formation mechanism of non-metallic inclusion clusters in vacuum arc remelted Ni-based superalloys 认领 引用
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作者 Yu Gu Kai-Xuan Gui +1 位作者 Peng Zhao Shu-Feng Yang 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第5期18-32,共15页
A quantitative study of inclusions in an industrial superalloy ingot produced by vacuum arc remelting(VAR)was conducted,and the characteristics as well as the formation mechanism of non-metallic inclusion clusters wer... A quantitative study of inclusions in an industrial superalloy ingot produced by vacuum arc remelting(VAR)was conducted,and the characteristics as well as the formation mechanism of non-metallic inclusion clusters were discussed.Results showed that inclusions within the VAR ingot primarily consisted of individual nitrides and composite inclusions such as oxide-nitrides.The quantity density of individual inclusions increases radially from the center to the edge of the ingot,while decreasing axially from the top to the bottom,with the average size gradually decreasing in both radial and axial directions.Clustered inclusions were identified in the subsurface regions(2-10 mm in depth)and sidewall surfaces of the ingot.The formation mechanism and distribution characteristics of clustered inclusions during the VAR process were studied by combining in-situ high-temperature laser confocal microscopy observation and numerical analysis.In-situ observations confirm that larger inclusions lead to reduced critical aggregation distance,while smaller spacing enhances attraction and promotes cluster formation.The cavity bridge force between inclusions is significantly greater than the capillary force and van der Waals force,serving as the primary force responsible for the aggregation of inclusions.Numerical analysis reveals that inclusions within the VAR melt pool exhibit typical flow-following behavior and size effects,with their trajectory leading to preferential accumulation patterns along both the sidewall and subsurface regions,thereby facilitating cluster formation through particle agglomeration. 展开更多
关键词 Inclusion cluster Formation mechanism Aggregation behavior Ni-based superalloy Vacuum arc remelting
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Corrosion-resistant and bioactive FeMn-CaP-Col@CS coating on magnesium alloy for orthopedic implants:Fabrication and characterization 认领 引用
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作者 Xuhui Liu Zijin Xiao +8 位作者 Yang Yuan Qihong Huang Kaiwei Tang Yilong Dai Dechuang Zhang Jia She Feng Peng Fugang Qi Xiaoping Ouyang 《Metals Advances》 SCIE EI CAS CSCD 2026年第1期1-12,共12页
To address the rapid degradation behavior of magnesium alloys in physiological environments,a multifunctional gradient FeMn-CaP-Col@CS composite coating was fabricated on the surface of biodegradable WE43 magnesium al... To address the rapid degradation behavior of magnesium alloys in physiological environments,a multifunctional gradient FeMn-CaP-Col@CS composite coating was fabricated on the surface of biodegradable WE43 magnesium alloy.The FeMn alloy interlayer was deposited via filtered cathodic vacuum arc(FCVA)technology,with optimized substrate bias voltage and deposition parameters to improve corrosion resistance and mechanical performance.Subsequently,a calcium phosphate(CaP)layer and a bioactive polymer layer composed of collagen(Col)and chitosan(CS)were sequentially introduced via chemical conversion treatment to construct a compact,uniform multilayer coating.The sample with FeMn-CaP-Col@CS composite coating exhibited a significantly reduced corrosion current density compared to uncoated WE43,along with a markedly increased impedance.Biological evaluations,including cytocompatibility assays and live/dead cell staining,indicated excellent cell viability and adhesion on the coated samples.Real-time quantitative polymerase chain reaction(RT-qPCR)analysis revealed upregulated expression of osteogenesis-related genes.The composite coating effectively maintained a favorable microenvironment while providing moderate osteoinductivity due to the synergistic effect of Col and CS.In summary,the FeMn-CaP-Col@CS gradient coating system substantially enhances the corrosion resistance and biocompatibility of WE43 magnesium alloy,offering a promising strategy for the clinical application of magnesium-based orthopedic implants. 展开更多
关键词 Magnesium Composite coating Corrosion Osteogenesis
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Multifunctional hydrophobic/superhydrophobic protective coatings for magnesium alloys:A review on material design,protection mechanisms,and engineering applications 认领 引用
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作者 Qing Xiang Jingxiong Zeng Bo Qiao 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第4期92-117,共26页
Magnesium(Mg)alloys have broad application prospects in transportation,biomedical engineering,and marine engineering owing to their low density,high specific strength,and excellent processing properties.However,their ... Magnesium(Mg)alloys have broad application prospects in transportation,biomedical engineering,and marine engineering owing to their low density,high specific strength,and excellent processing properties.However,their inherent susceptibility to corrosion and insufficient service stability urgently necessitate the development of advanced protective coating technologies.Functional hydrophobic and superhydrophobic coatings are designed by constructing special wetting interfaces that combine micro-anostructures with low-surface-energy materials.These coatings not only significantly delay the penetration of corrosive media but also integrate multiple functionalities,such as antibacterial activity,self-healing,anti-icing,antifouling,photocatalysis,and electrical conductivity,thereby realizing a transition from passive isolation to active protection.This review systematically summarizes the material systems,structural design strategies,protection mechanisms,representative fabrication methods,and recent progress in the application of functional hydrophobic/superhydrophobic coatings for Mg alloys.Particular attention is devoted to the synergistic relationships among surface roughness,porosity,surface energy,and durability,as well as to defect evolution and failure modes under multifield coupled environments.Addressing current bottlenecks,including the lack of fluorine-free alternatives,insufficient multifunctional integration,complex fabrication processes,and limited long-term service stability,the article highlights future research directions such as green alternative materials,multifunctional modular integration,bioinspired interface reinforcement,and intelligent responsive protection systems.Collectively,these insights provide theoretical foundations and technical pathways toward achieving long-term,reliable protection and advancing the practical engineering applications of hydrophobic/superhydrophobic coatings on Mg alloys under complex service environments. 展开更多
关键词 Mg alloys Hydrophobic/superhydrophobic coatings Corrosion protection Multifunctional coatings Surface engineering
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Marine Applications of Metal-Modified FEVE Coatings on 6061 Aluminum Alloy for Enhanced Anti-Corrosion and Anti-Biofouling 认领 引用
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作者 Chang Liu Quantong Jiang +3 位作者 Zhenhua Chu Yandao Chen Jizhou Duan Baorong Hou 《Rare Metals》 SCIE EI CAS CSCD 2026年第7期118-131,共14页
This study developed a metal-modified fluoroethylene vinyl ether(FEVE)organic coating on 6061 aluminum alloy,supported by a micro-arc oxidation(MAO)pretreatment layer,to enhance corrosion resistance and antifouling pe... This study developed a metal-modified fluoroethylene vinyl ether(FEVE)organic coating on 6061 aluminum alloy,supported by a micro-arc oxidation(MAO)pretreatment layer,to enhance corrosion resistance and antifouling performance in marine environments.The MAO layer offered initial ceramic protection,reducing icorr from 2.46×10−6 to 6.27×10−7 A cm−2.FEVE fluorocarbon resin acting as the primary functional barrier provided a dense,low-polarity outer layer,whereas La3+/Ho3+ions coordinated with the polymer matrix and deposited in situ as metal oxides at micro-defects,further decreasing icorr to 1.62×10−9 A cm−2.Additionally,the combined effects of FEVE hydrophobicity,metal ion activity,and Ag+/Cu2+release effectively inhibited fungal growth and diatom adhesion,maintaining stable antifouling performance over 7-14 days.Scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS),and X-ray diffraction(XRD)results confirmed uniform metal modification dispersion and improved organic/inorganic interfacial densification.Overall,the MAO-FEVE-La/Ho system demonstrates a polymer-driven barrier-defect-sealing-ion-assisted antifouling mechanism,offering strong potential for long-term marine applications. 展开更多
关键词 6061 aluminum alloy anti-biofouling anti-corrosion coating metal modification
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Amphiphilic Block Copolymer-Functionalized VO2Nanocomposites for Smart Waterborne Polyurethane Coatings 认领 引用
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作者 Xiuxian Zhao Junhua Sun +7 位作者 Shudi Ying Rongchuang Geng Jiajia Feng Jiachen Ma Riming Hu Panpan Zhao Xuchuan Jiang Zheng Liu 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期810-824,共15页
Aqueous vanadium dioxide(VO2)-based smart thermal insulation coatings represent a viable strategy to decrease building energy consumption and advance sustainable development goals.However,the inherent instability a... Aqueous vanadium dioxide(VO2)-based smart thermal insulation coatings represent a viable strategy to decrease building energy consumption and advance sustainable development goals.However,the inherent instability and limited compatibility with polymer matrices of VO2hinder its widespread application.Herein,a core-shell structured nanocomposite,VO2@poly(hexafluorobutyl methacrylate-block-N,N-dimethylacrylamide)(VO2@PHFBMA-b-PDMA),is developed and applied to waterbased intelligent coatings.The experimental results show that the designed block copolymer shell PHFBMA-b-PDMA not only has excellent acid and oxidation resistance but also improves the water dispersion stability of VO2,ensuring the compatibility between VO2and the organic polymer matrix.Moreover,the shell can effectively increase the carrier concentration in VO2,thereby significantly enhancing the local surface plasmon resonance effect and giving it excellent optical performance.By optimizing the formula and incorporating the VO2@PHFBMA-b-PDMA nanocomposites into water-based polyurethane resins,the resulting coating exhibits excellent adhesion,high hardness,and strong resistance to thermal cycling and ultraviolet aging.In addition,the coating has significant thermochromic properties,which can transmit nearinfrared radiation at low temperatures and effectively shield near-infrared radiation at high temperatures.Compared with uncoated glass,the designed coated glass can reduce indoor temperature by approximately 5℃. 展开更多
关键词 aqueous smart coatings core-shell structure energy-saving thermochromic vanadium dioxide
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Multifunctional Hierarchical Coatings with Synergistic Anti-graffiti and Ultra-hardness Properties for NIR Shielding Energy-saving Windows 认领 引用
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作者 Li-Kai Yang Qian-Qian Hou +13 位作者 Shu-Di Ying Cong-Cong Zhai Xu Yang Yu-Lin Yin Qian Liu Bing Wei Ming-Wei Shao Pan-Pan Zhao Xiu-Xian Zhao Wen-Ting Li Jia-Chen Ma Chuan-Yong Zong Yong Nie Xu-Chuan Jiang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第3期833-844,I0016,共12页
The efficient regulation of sunlight to minimize unnecessary energy exchange through windows plays a vital role in advancing building energy efficiency.However,the inferior stability of cerium-doped tungsten trioxide(... The efficient regulation of sunlight to minimize unnecessary energy exchange through windows plays a vital role in advancing building energy efficiency.However,the inferior stability of cerium-doped tungsten trioxide(CWO)as a near-infrared(NIR)shielding material,combined with the poor mechanical properties of its coatings,poses significant challenges for long-term thermal insulation performance.Here,a hierarchical thermal insulation coating with multifunctional integration has been developed.The inner layer’s excellent NIR shielding performance(94.4%)results in a temperature reduction of 13.6°C,demonstrating outstanding thermal insulation.Meanwhile,the external layer composed of polysilsesquioxane grafted by carboxylated hexafluoropropylene trimer offers exceptional weather resistance due to the low surface energy.The fluorosilicone coating effectively mitigates oxidation of CWO,as evidenced by the retention of NIR shielding performance even after 30 days of exposure to 60°C and 90%relative humidity.Furthermore,the coating demonstrates superior anti-graffiti properties and achieves an ultra-high mechanical strength of 0.49 GPa through precise fluorine content modulation.This hierarchical design integrates high hardness,excellent abrasion resistance,anti-graffiti functionality,transparency,and long-term operational durability into a single smart window system,offering a promising solution for reducing building energy consumption. 展开更多
关键词 Smart window Anti-graffiti Abrasion resistance Long-term stability Multifunctional coating
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