摘要:
结合BSE显微组织观察和EDS能谱分析、IPP统计分析、XRD物相检测和密度、硬度、抗弯强度测试,研究了不同烧结温度和Mo添加量对(Ti,V,Mo) C基金属陶瓷显微组织和力学性能的影响。研究表明:(Ti,V,Mo) C基金属陶瓷的显微组织中黑色芯相和灰色相共同构成硬质相,Mo添加剂主要作用于硬质相形成碳化物固溶体。随着烧结温度的升高,黑色芯相比例降低,灰色相区粗化明显,抗弯强度下降。当烧结温度为1 400℃,Mo添加量为6%时,(Ti,V,Mo) C基金属陶瓷的综合性能较佳。
关键词:
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钛基金属陶瓷 /
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Mo /
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组织 /
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物相 /
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力学性能
Abstract:
The effects of Mo addition and sintering temperature on the microstructure and mechanical properties of（Ti,V,Mo）C-based cermets were investigated by BSE ＆ EDS,IPP,XRD and density,hardness,bending strength tests.The results show that the hard phase is constituted by black core phase and grey phase in（Ti,V,M）C-based cermets.Mo addition mainly contributes to form carbides solution in the hard phase.With increasing the sintering temperature,the proportion of black core phase decreases and the grey phase coarsens obviously,leading to the decrease of bending strength.（Ti,V,M） C-based cermet with favorable comprehensive properties can be obtained at 1 400 ℃ of sintering temperature with 6% of Mo addition.
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