摘要
粉末冶金制备Ti Cp/Fe复合材料时易发生界面反应,对其性能产生影响。对制备的Ti Cp/Fe复合材料的显微组织、物相组成等进行测试,应用热力学原理对界面反应中的热力学过程进行分析,探明复合材料发生界面反应时的烧结温度和保温时间。结果表明:通过热力学计算,增强体Ti C和基体Fe的界面反应临界温度为1 270℃;实验中,当保温时间为2 h、烧结温度超过1 300℃时,或在1 300℃下保温时间超过2 h,增强体Ti C和基体Fe会发生界面反应;界面反应产生了呈针状的新物质(Ti8C5和Fe2C),影响了增强体和基体的结合强度,导致了复合材料性能的下降。
The interface reaction is easy to occur while the preparation of TiCp/Fe composites by powder metallurgy,which will affect its performance. In order to ascertain the sintering temperature and holding time of the interfacial reaction of the composite material,the microstructure and phase composition of the Ti Cp/Fe composite material were tested,and the thermodynamic process of the interface reaction was analyzed by thermodynamic principles. The results show that the critical temperature of the interface reaction between the reinforcement TiC and the matrix Fe is 1 270 ℃ by the thermodynamic calculation. When the holding time is 2 h and the sintering temperature exceeds 1 300 ℃,or the holding time is more than 2 h at 1 300 ℃,the interface reaction will occur between the reinforcement TiC and the matrix Fe in the experiment. The interfacial reaction generates some new needle-like substances(Ti8 C5 and Fe2 C),which affect the bonding strength of the reinforcement and the matrix,and reduce the performance of the composite.
作者
耿文霞
王秋林
万斌
徐如涛
李昂
赵龙志
GENG Wen-xia;WANG Qiu-lin;WAN Bin;XU Ru-taol;LI Ang;ZHAO Long-zhi(Chengdu Aeronautic Polytechnic,Chengdu 610100,China;School of Materials Science and Engineering,East China Jiao Tong University,Nanchang 330013,China;Avic Chengfei Commercial Aircraft Co.,Ltd,Chengdu 610092,China)
出处
《粉末冶金工业》
CAS
北大核心
2020年第4期51-56,共6页
Powder Metallurgy Industry
基金
国家自然科学基金(51465019)
四川省教育厅资助项目(18ZB0058)
成都航空职业技术学院重点项目(061623Y、061902)。
关键词
粉末冶金
界面反应
烧结温度
保温时间
热力学
硬度
powder metallurgy
interfacial reaction
sintering temperature
holding time
thermodynamic
hardness
