无机材料学报

• 研究论文 • 上一篇    下一篇

无压烧结制备氧氮化硅陶瓷

徐鑫; 黄莉萍; 葛其明; 符锡仁   

  1. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2000-01-28 修回日期:2000-03-04 出版日期:2001-01-20 网络出版日期:2001-01-20

Pressureless Sintering of Si2N2O

XU Xin; HUANG Li-Ping; GE Qi-Ming; FU Xi-Ren   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2000-01-28 Revised:2000-03-04 Published:2001-01-20 Online:2001-01-20

摘要: 以β-Si和SiO粉末为原料,以MgAl为烧结添加剂,通过无压烧结制备出致密的SiO陶瓷材料.所得材料由柱状SiO颗粒和少量β-Si颗粒复合组成,研究了烧结温度对材料显微结构的影响,发现材料的断裂大部分是穿晶断裂.

关键词: 氧氨化硅, 无压烧结, 显微结构, 力学性能

Abstract: Dense Si2N2O ceramics were pressurelessly signered from β-Si3N4 and SiO2 powders with 4wt% MgAl2O4 additive. Microstructures of this material consisted of rod-like Si2N2O grains and a little amount of β-Si3N4. The effect of sintering temperatures on the microstructures was studied. Crack deflection profile suggested transgranular fracture of the material.

Key words: silicon oxynitride, pressurelessly sintering, microstructure, mechanical properties

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