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Strengthening mechanism of B_4C@APC/al matrix composites reinforced with bimodal-sized particles prepared by hydrothermal carbonized deposition on chips

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Journal of Materials Science & Technology 2022年第28期123卷 60-69页

作者： Yingjie He Hongyu Xu Yang Liu Yihan Chen Zesheng Ji School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbin 150040China Energy and Environment Engineering Institute Nanchang Institute of TechnologyNanchang 330044China College of Electrical Energy and Power EngineeringYangzhou UniversityYangzhou 225127China

A B_(4)C@amorphous carbon(APC)/al matrix composite was fabricated by using hydrothermal carbonized deposition on chips(HTCDC)process and solid-state synthesis *** microstructure and mechanical properties of the B_(4)C@APC/al matrix composite were *** HTCDC process,nano-B_(4)C particles(50 nm)and micron-sized B_(4)C@APC core-shell spheres with a diameter of 2μm were found in the *** microhardness of the micron-sized B_(4)C@APC spheres is 1.66 GPa,which is greater than that of theα-al matrix(1.06 GPa).Dislocation accumulation is observed around the micron-sized B_(4)C@APC spheres,indicating that the micron-sized B_(4)C@APC spheres have a strengthening effect on theα-al *** to the formation of micron-sized B_(4)C@APC spheres,the reinforcement of nano-B_(4)C particles into the composites is transformed from single-sized particle enhancement to bimodal-sized particle *** strengthening mechanism for B_(4)C@APC/al matrix composites with bimodalsized particles of nano-B_(4)C and micron-sized B_(4)C@APC spheres were analyzed,which includes thermal mismatch strengthening generated by the mismatch of coefficient of thermal expansion(CTE)between micron-sized B_(4)C@APC core-shell spheres andα-al matrix,Orowan strengthening produced by nano-B_(4)C particles,Hall-Petch strengthening and load transfer strengthening produced by the bimodal-sized enhancement from nano and microspheres.A relationship model between the yield strength(YS)increment and the conversion rate(x)of micron-sized B_(4)C@APC core-shell spheres was estimated.

关键词： Bimodal-sized particle enhancement Micron-sized B_4C@APC core-shell spheres al matrix composites Strengthening mechanism

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al matrix composites fabricated by solid-state cold spray deposition:A critical review

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Journal of Materials Science & Technology 2021年第27期86卷 20-55页

作者： Xinliang Xie Shuo Yin Rija-nirina Raoelison Chaoyue Chen Christophe Verdy Wenya Li Gang ji Zhongming Ren Hanlin Liao ICB UMR 6303 CNRSUniv.Bourgogne Franche-ComtéUTBMF-90010BelfortFrance Univ.Lille CNRSINRAECentrale LilleUMR 8207UMET-UnitéMatériaux et TransformationsF-59000LilleFrance Department of Mechanical and Manufacturing Engineering Trinity College DublinThe University of DublinParsons BuildingDublin 2Ireland Institute of Mechanics Materials and Civil EngineeringUC LouvainLouvain-la-NeuveBelgium State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai200444China State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of Friction Welding TechnologiesNorthwestern Polytechnical UniversityXi’an710072China

Cold spraying(CS),or cold gas dynamic spray(CGDS),is an emerging solid-state powder deposition process,allowing fast and mass production and restoration of metallic *** of metal matrix composites(MMCs)has attracted increasing attention from academia and industry over the last decades,especially in the area of al matrix composites(AMCs),which have demonstrated a high potential for applications in aerospace,automotive,and electronics *** article aims to summarize the recent development of CS-processed AMCs in terms of composite powder preparation,deposition processing,microstructure evolution,mechanical and corrosion ***,this review also reports the relevant research progress with the focus on post-treatments of the AMCs for CS additive manufacturing applications including heat treatment,hot rolling,and friction stir ***,the challenges and perspectives on the fabrication of advanced AMCs by CS are addressed.

关键词： al matrix composites Solid-state cold spraying Additive manufacturing Post-treatments

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Microstructure and Mechanical Properties of alSiTiCrNiCu Particles Reinforced al6061 composites by SPS and HPS Process

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Journal of Wuhan University of Technology(Materials Science) 2022年第1期37卷 1-12页

作者：王智君 ZHOU Shengjie SHAO Puzhen SUN Kai 张强修子扬肖海英 WU Gaohui School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Chengdu Holy Industry&Commerce Corp.Ltd.(Group) Chengdu 611936China

Three groups of alSiTiCrNiCu high entropy alloy(HEA)particles reinforced al606l composites were fabricated by spark plasma sintering at 520 and 570℃(S520,S570)and by hot-pressed sintering at 570℃(H570).The alSiTiCrNiCu(AST)particles used as reinforcements were synthesized by mechanical *** influences of the sintering process on the microstructure and mechanical properties of composites were *** results showed that the AST particles had a near-equiatomic composition with a single BCC *** sintering temperature and time had a coupling influence on the interfacial microstructure.S520 had hardly reaction products and slight interfacial diffusion,and the AST particles were completely high *** interfacial reactions happened on S570 and H570 with the same reaction *** element diffusion of S570 was focused on the edge of the AST particles with partial loss of high *** element diffusion and entire loss of high entropy of AST particles happened on *** differences in the microstructure caused by the three preparation methods led to the changes in mechanical properties and fracture mechanisms of composites.

关键词： high entropy alloys mechanical alloying al matrix composites spark plasma sintering hot-pressed sintering

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