Preparation of TiB_2-TiC_(0.5)N_(0.5) Ceramic Composite by Reactive Hot-Pressing and its Microstructure

摘要

In this paper, using TiH_2, BN and B_4C as raw materials, reactive hot-pressing method is proposed to produce TiB_2-TiC_(0.5)N_(0.5) ceramic composite. In the produced TiB_2-TiC_(0.5)N_(0.5) composite, very fine (in general, 10 nm) TiC_(0.5)N_(0.5) precipitates are found dispersed in TiB_2 grains by using SEM and TEM. The mechanism of the formation of this kind of structure and how to control it by processing design and its influence on the properties of the material are worth further study.