Microstructure and mechanical properties of in situ produced SiC/TiSi2 nanocomposites

被引：27
作者：
Li, JL [1 ]
Jiang, DL [1 ]
Tan, SH [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2000年 / 20卷 / 02期
关键词：
mechanical properties; microstructure; nanocomposites; SiC; TiSi2;
D O I：
10.1016/S0955-2219(99)00157-0
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure and mechanical properties of in situ produced SiC/TiSi2 nanocomposites have been studied. The results indicate that SiC/TiSi2 composites can be fabricated by reactively hot pressing mixed powders of TIG, elemental Si and elemental Ti. The in situ produced SiC particles are close to nanosize. Without elemental Ti powder, the composite obtained consists of TiSi2 66 vol% and SiC 34 vol% without residual Si or TIG. At ambient temperature, the highest bending strength of SiC/TiSi2 composites was 400 MPa, twice that of monolithic TiSi2. Also fracture toughness of SiC/TiSi2 composites exceeds that of pure TiSi2. At 1200 degrees C, the yield strength of composites was improved due to the presence of the SIC particles. (C) 2000 Elsevier Science Ltd. All rights reserved.
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收藏
页码：227 / 233
页数：7
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