摘要
用真空预烧+热等静压处理工艺制备了纳米复合Ti(C,N)基金属陶瓷,用SEM和TEM／EDX研究了预烧温度对纳米复合Ti(C,N)基金属陶瓷显微组织和性能的影响。结果表明：随着预烧温度的升高,硬质相颗粒明显球化、细化且分布均匀,具有白芯-灰壳结构的小硬质相颗粒明显增多,且环形相较完整。在1420℃预烧时,金属陶瓷具有较好的力学性能；继续升高预烧温度时,晶粒会明显长大,环形相变厚、变脆,导致材料的性能下降。综合考虑认为,较佳预烧结温度为1420℃。
The nano-composite Ti（C, N）-based cermets were produced by vacuum pre-sintering and post-hot isostatic pressing technology. The influence of pre-sintering temperature on the microstructure and properties of nano-composite Ti（C, N）-based cermets has been studied using SEM, TEM and EDX. With the increase of pre- sintering temperature, the grains were spheroidized gradually and distributed evenly, the size of grains decreased, the small grains with inner-rim and outer-rim and white core-gray hull increased greatly and the rim phase was complete. For the nano-composite cerrnets sintered at 1 420℃C, it could acquire satisfied microstructure and good properties. When the pre-sintering temperature increased further, the crystalline began to grow, the rim phase became wider and the properties of cermets decreased. The optimal pre-sintering temperature of nano-composite Ti（C,N）-based cermets was 1420℃.
出处
《机械工程材料》
CAS
CSCD
北大核心
2006年第6期91-94,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金(50074017
50104006)
湖北省自然科学基金(2000J032)
湖北省教育厅科研项目计划资助项目(2001D67002)
关键词
TI(C
N)基金属陶瓷
预烧温度
纳米复合
热等静压
Ti（C,N）-based cermet
pre-sintering temperature
nano composite
hot isostatic pressing
