Effect of VC on Microstructure and Mechanical Properties of TiC-based Cermets
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摘要: 结合BSE显微组织观察、EDS能谱分析、XRD物相检测和密度、硬度、抗弯强度测试，研究了VC添加量在不同烧结温度下对TiC基金属陶瓷显微组织和力学性能的影响。研究表明：TiC基金属陶瓷显微组织中的芯相和环相具有相同的晶体结构。随着VC含量的增加，TiC基金属陶瓷显微组织中的环相有粗化的趋势，烧结温度提高时环相粗化明显。当烧结温度为1 340℃，VC添加量为4%时，TiC基金属陶瓷的综合性能较佳。Abstract: The effect of VC addition amount on the microstructure and mechanical properties of the TiC-based cermet at different temperatures was investigated using BSE,EDS,XRD and density,hardness,bending strength tests.The results show that the core and rim phases in the TiC-based cermet have the same crystal structure.With increase in VC addition,grey rims in the cermet tend to be coarse,and the trend becomes more obvious at higher sintering temperatures.The best comprehensive properties of the TiC-based cermet can be obtained at 1 340℃ of sintering temperature with 4% of VC added.
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Key words:
- TiC-based cermets /
- VC /
- microstructure /
- mechanical properties
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