锡
材料科学
粒子(生态学)
复合数
粒径
基质(化学分析)
原位
复合材料
冶金
化学
物理化学
有机化学
海洋学
地质学
作者
Kazuo Ueno,Takahiro Inoue,Satoshi Sodeoka,Masato Suzuki,Hiroshi Ishikawa,Koujirou UCHIYAMA,Tsuzuru INUI
出处
期刊:Nippon Seramikkusu Kyōkai gakujutsu rombunshi
[Ceramic Society of Japan]
日期:1997-01-01
卷期号:105 (1220): 304-307
被引量:11
标识
DOI:10.2109/jcersj.105.304
摘要
Si3N4 matrix composite reinforced with 5vol% TiN particles was fabricated by the in-situ reaction: 4TiO2+4AlN→4TiN+2Al2O3+O2, followed by hot-pressing. The internal TiN formation reaction was studied using TiO2 powders with three different particle sizes (0.28, 0.35 and 1.19μm). The reaction is likely to start from nearly 1150°C and finishes at 1450°C, before the Si3N4 matrix is sintered, and TiN formation is confirmed from the unit cell dimension. TiN particle sizes in the composites sintered at 1600°C and 1850°C were measured. When the TiO2 particle size was large (1.19μm), the particle crumbled into fragments and underwent nitridation to TiN with a smaller size than that of the original TiO2. Smaller TiO2(0.28μm) was converted into TiN particles of nearly the same size. These results suggest that the in situ TiN formation proceeds through nitridation of TiO2 particles.
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