Microstructure and Mechanical Properties of Cu Matrix Composites Reinforced by TiB_(2)/TiN Ceramic Reinforcements

作     者：Jinwei Yin Peilong Zhou Hanqin Liang Dongxu Yao Yongfeng Xia Kaihui Zuo YuPing Zeng Jinwei Yin;Peilong Zhou;Hanqin Liang;Dongxu Yao;Yongfeng Xia;Kaihui Zuo;YuPing Zeng

作者机构：State Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2020年第33卷第12期

页      面：1609-1617页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：financially supported by the National Key R&D Program of China(No.2018YFF01013605) the National Natural Science Foundation of China(No.51501215) the Youth Innovation Promotion Association CAS(No.2019254) the Science Foundation for Youth Scholar of State Key Laboratory of High Performance Ceramics and Superfine Microstructures(No.SKL201701) the State Key Laboratory of New Ceramic and Fine Processing Tsinghua University(No.KF201806)。 

主　　题：Cu matrix composite Microstructure Mechanical property Self-propagating high-temperature synthesis(SHS) 

摘      要：Cu matrix composites reinforced by TiB_(2)/TiN ceramic reinforcements(Cu/TBN composites)were prepared by hot pressing method.Prior to the hot pressing,Cu/TiB_(2)/TiN composite powders(CTBN powders),which were used as the starting materials of Cu/TBN composites,were fabricated by self-propagating high-temperature synthesis method.The CTBN particles were found to be in a special core–shell structure with a Cu–Ti alloy core and a TiB_(2)/TiN ceramic shell.The test results presented obvious improvements in mechanical properties.The highest ultimate tensile strength reached up to 297 MPa,77 MPa higher than that of Cu.And the highest hardness reached up to 70.7 HRF,15.7 HRF higher than that of Cu.A comparative study indicated that the core–shell structured particles could bring about more obvious strengthening eff ect than the traditional irregularly shaped particles,which was due to the improved Cu/ceramics interfacial bonding,the linkage strengthening effect of both TiB_(2) and TiN,and higher load bearing ability of the core–shell structured reinforcements.