Effect of thermal exposure on strength of ZrB2-based composites with nano-sized SiC particles

被引：130
|
作者：
Guo, Shu-Qi [1 ]
Yang, Jenn-Ming [2 ]
Tanaka, Hidehiko [3 ]
Kagawa, Yutaka [1 ,4 ]
机构：
[1] Natl Inst Mat Sci, Composites & Coatings Ctr, Tsukuba, Ibaraki 3050047, Japan
[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
[3] Natl Inst Mat Sci, Nano Ceram Ctr, Tsukuba, Ibaraki 3050044, Japan
[4] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538505, Japan
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2008年 / 68卷 / 14期
关键词：
Zirconium diboride; Nano Sic particles; Thermal exposure; Flexural strength;
D O I：
10.1016/j.compscitech.2008.06.021
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
The effect of oxidation exposure on the room-temperature flexural strength of ZrB2-based composites with nano-sized and micron-sized SiC particles was investigated. The composites were densified by vacuum hot-pressing at 2000 degrees C for 60 min under a uniaxial pressure of 30 MPa. The flexural strength of as-received composites and after exposure in air at 1400 degrees C for 10 h was measured using the four-point bending test. The results show that the presence of intergranular and intragranular nano-sized SiC particles imparts a better oxidation resistance and improves the flexural strength of single-phase ZrB2 and ZrB2 ceramics with micron-sized SiC. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3033 / 3040
页数：8
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