用透射电子显微技术研究Si<sub>3</sub>N<sub>4</sub>/纳米SiC复相陶瓷的微观结构与力学性能

用透射电子显微技术研究Si₃N₄/纳米SiC复相陶瓷的微观结构与力学性能

摘要: 利用透射电子显微镜,观察了Si₃N₄/纳米SiC复相陶瓷材料的显微结构特点、分析比较了纳米复相陶瓷与单相Si₃N₄陶瓷的显微结构差异、讨论了复相陶瓷材料的力学性能与其微观结构的关系,并提出在材料中引入纳米SiC粒子后,可以起到抑制Si₃N₄晶体长大,使材料的力学性能得到显著提高.

Abstract: The microstructure characteristics of Si₃N₄/nano SiC multiphase ceramics material was studied by electronic microscopy,and the different of the nano multiphase ceramics and the single-phest Si₃N₄ ceramics microtructure was analysed.The relations of the multiphase ceramics matrial mechnical properties and the microstructure were discussed.The nano-grain in material restrain Si₃N₄ crystallinity,improve the mechanical properties of material.