期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 21, 期 12, 页码 2179-2183出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0955-2219(01)00193-5
关键词
composites; mechanical properties; phase transformation; SiC; Si3N4; sintering
The influence of SiC fine particle dispersion on phase transformation, microstructure and mechanical properties Of Si3N4 ceramics has been investigated. While the SiC dispersion simply decreased the densification, it caused complex effects on the phase transformation behavior; the transformation was enhanced at low temperatures but suppressed at high temperatures. Since the phase transformation is a nucleation-grain growth process Of beta -Si3N4 SiC particles plausibly enhance formation of a great number Of P-Si3N4 nuclei due to the high Si3N4 SiC interfacial energy, but inhibit their further phase transformation and grain growth. The mean size and the aspect ratio of the obtained P-Si3N4 grains decreased as a result of the SiC dispersion, thus bringing about increased flexural strength and decreased fracture toughness. (C) 2001 Elsevier Science Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据