以偏钒酸铵、钛白粉和石墨为原料,采用碳热还原法制备了 Tix V1－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 Tix V1－x CN 基金属陶瓷,研究了Tix V1－x CN粉体的晶格常数a 与x 之间的关系,以及Tix V1－x CN基金属陶瓷的物相、组织和力学性能.结果表明：Tix V1－x CN固溶粉体的晶格常数a 和x 呈良好的线性关系；Tix V1－x CN 基金属陶瓷中的硬质相呈黑芯-灰壳结构；钼主要以Mo C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Mo0．09 Ni0．91；Ti0．8 V0．2 CN基金属陶瓷的组织比较均匀,其力学性能最佳,硬度为1460 HV,抗弯强度为873 MPa.
Pre-alloyed Tix V1-x CN solid-solution powders were synthesized by carbothermic method using ammonium metavanadate,titanium and graphite as raw materials,and then to prepare Tix V1-x CN based cerments by adding Ni and Mo powders.The relationship between lattice parameter a and x of Tix V1-x CN powders,as well as,phase,microstructure and mechanical properties of Tix V1-x CN based cermets were investigated.Results show that parameter a had good relationship with x.The hard phase of Tix V1-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.
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