Formation of TiB2–TiC composites by reactive sintering
Formation of TiB2–TiC composites by reactive sintering
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DOI：
10.1016/s0272-8842(98)00048-0
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发表时间：
1999-05
影响因子：
5.2
通讯作者：
Hong Zhao;Yi-bing Cheng
中科院分区：
文献类型：
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作者：
Hong Zhao;Yi-bing Cheng
TiB 2和TiC是共价化合物，具有优异的硬度和耐腐蚀性。使用常规烧结技术来致密化这些材料是非常困难的。本研究采用反应烧结法同时合成并致密化TiB 2-TiC复合材料。固相扩散是烧结过程中的主要机制。中间硼化物相的形成和它们的数量和稳定性强烈依赖于烧结温度和时间。结果表明，在1500°C下烧结1 h后，Ti金属与B4 C颗粒之间的化学反应完全，生成TiB 2-TiC陶瓷复合材料。
TiB2and TiC are covalent compounds and possess excellent hardness and corrosion resistance. It is very difficult to densify these materials using conventional sintering techniques. In this study, reactive sintering was used to simultaneously synthesise and densify TiB2–TiC composites. Solid state diffusion was the chief mechanism involved in the sintering process. Intermediate boride phases were formed and their amount and stability were strongly dependent on the sintering temperature and time. It was found that the chemical reaction between the starting Ti metal and B4C particles could be complete after sintering at ∼1500°C for 1 h, producing a TiB2–TiC ceramic composite.