含h-BN复相陶瓷制备及性能研究进展

陶瓷材料密度低、抗腐蚀性及耐磨性良好,但是其硬而脆导致加工困难、抗热震性差。h-BN具有弹性模量低、硬度低的特点,其可加工性能和抗热震性能优异。将h-BN引入陶瓷基体制备含h-BN复相陶瓷,能够有效改善陶瓷材料的可加工性能和抗热震性。对含h-BN复相陶瓷的材料体系、制备工艺和性能的研究一直备受关注。本文以h-BN的引入方式为分类依据较全面地总结了含h-BN复相陶瓷的制备方法。本文对引入h-BN后所制备的含h-BN复相陶瓷的常规力学性能、抗热震性、可加工性、透波性、摩擦磨损等性能的影响进行了综述;对含h-BN复相陶瓷的制备及性能研究中存在的问题进行了概括,并对该材料体系的研究方向提出了建议。

Advances in Fabrication and Properties Research of h-BN Contained Ceramic Composites

Ceramic materials possess the advantages of low density, favorable corrosion resistance and abrasive resistance. Nevertheless, ceramics are pretty hard and brittle, which results in poor machinability and thermal shock resistance. h-BN presents low elastic modulus and hardness, its machinability and thermal shock resistance are excellent. Therefore, the machinability and thermal shock resistance of ceramics can be obviously improved by introducing h-BN into ceramics. The research on the materials system, fabrication routes, and properties of the h-BN contained ceramic composites have been attracting enormous attention. In this article, fabrication routs of h-BN contained ceramic composites are reviewed based on the introducing methods of h-BN. The effects of h-BN on the properties of h-BN contained ceramic composites, including mechanical properties, thermal shock resistance, machi-nability, wave transparent properties and tribology properties are summarized thoroughly. The existing problems on the fabrication and properties research of the h-BN contained ceramic composites are concluded, and the future research and development direction is proposed.