Ti_xV_(1-x)CN基金属陶瓷的显微组织与力学性能  

Microstructure and Mechanical Properties of Ti_xV_(1-x)CN Based Cermets

作　　者：陈敏[1] 肖玄[1] 任杰[2] 谭斌[1] 钟华杰[1] 

机构地区：[1]攀枝花学院材料工程学院,攀枝花617000 [2]西华大学材料科学与工程学院,成都610039

出　　处：《机械工程材料》2016年第5期31-34,共4页Materials For Mechanical Engineering

基　　金：四川省应用基础研究项目(2014JY0132);攀枝花市创新人才培养项目(2015TX-11);攀枝花市科技支撑项目(2015CY-G-18;2013CY-G-7;2014CY-G-26-1)

摘　　要：以偏钒酸铵、钛白粉和石墨为原料,采用碳热还原法制备了Ti_xV_(1-x)CN预合金化固溶粉体,然后再添加镍、钼金属粉体,采用粉末冶金法制备了Ti_xV_(1-x)CN基金属陶瓷,研究了Ti_xV_(1-x)CN粉体的晶格常数a与x之间的关系,以及Ti_xV_(1-x)CN基金属陶瓷的物相、组织和力学性能。结果表明:Ti_xV_(1-x)CN固溶粉体的晶格常数a和x呈良好的线性关系;Ti_xV_(1-x)CN基金属陶瓷中的硬质相呈黑芯-灰壳结构;钼主要以MoC的形式与硬质相核心发生固溶,剩余的少量钼固溶到粘结相镍中形成Mo_(0.09)Ni_(0.91);Ti_(0.8)V_(0.2)CN基金属陶瓷的组织比较均匀,其力学性能最佳,硬度为1 460HV,抗弯强度为873 MPa。Pre-alloyed TixV（1-x）CN solid-solution powders were synthesized by carbothermic method using ammonium metavanadate, titanium and graphite as raw materials, and then to prepare TixV（1-x） CN based cerments by adding Ni and Mo powders. The relationship between lattice parameter a and x of TixV（1-x） CN powders, as well as, phase, microstructure and mechanical properties of Ti_xV_（1-x）CN based cermets were investigated. Results show that parameter a had good relationship with x. The hard phase of Ti_xV_（1-x） CN based cermets had black core-grey shell structure. Large amounts of Mo in the form of MoC was solid dissolved with hard phase core, and Mo0.09 Ni0.91 was formed by the solid solution of residual Mo with Ni. The Ti0.8 V0.2 CN based cermet had uniform microstructure and best mechanical properties, the hardness was 1 460 HV and＇the blending strength was 873 MPa.

关 键 词：Ti_xV_(1-x)CN 金属陶瓷 显微组织 力学性能 

分 类 号：TG148[一般工业技术—材料科学与工程]