Pinning effect of SiC particles on mechanical properties of Al2O3-SiC ceramic matrix composites

被引：55

作者：

Deng, ZY ^{[1
]}

Shi, JL ^{[1
]}

Zhang, YF ^{[1
]}

Jiang, DY ^{[1
]}

Guo, JK ^{[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 | 1998年 / 18卷 / 05期

关键词：

D O I：

10.1016/S0955-2219(97)00164-7

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 fracture mechanical properties of SiC particle reinforced Al2O3 matrix composites were investigated at room temperature and T = 1200 degrees C. The showed that the fracture strength and toughness of composites are enhanced compared with those of monolithic Al2O3, especially at elevated temperature, and the strength and toughness of composites increase with the increase in the content of SiC particles. It was found that the improvement in fracture mechanical properties of composites is due to the fracture mode transformation from intergranular in monolithic Al2O3 to transgranular in the composites, and the fracture mode change might result mainly from the pinning effect of SiC particles on the Al2O3 boundaries. The study on flexure creep behavior of monolithic Al2O3 and the composites with 20 vol% SiC particles at T = 1260 degrees C indicated that the composites also exhibited some improvement in their creep resistance, compared to the creep behavior of monolithic Al2O3, due to the pinning effect of SiC particles at Al2O3 grain boundaries on grain boundary sliding during creeping. (C) 1998 Elsevier Science Limited. All rights reserved.

引用

页码：501 / 508

页数：8

共 23 条

[1] Indentation fracture toughness and surface flaw analysis of sintered alumina/SiC nanocomposites [J].