Pressureless sintering of ZrB2-SiC ceramics: the effect of B4C content

被引：70
|
作者：
Zhang, Hui [1 ,2 ]
Yan, Yongjie [1 ]
Huang, Zhengren [2 ]
Liu, Xuejian [1 ]
Jiang, Dongliang [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
SCRIPTA MATERIALIA | 2009年 / 60卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ZrB2; SiC; Microstructure; Mechanical properties; HIGH TEMPERATURE CERAMICS; DIBORIDE-BASED COMPOSITES; ZIRCONIUM DIBORIDE; MECHANICAL-PROPERTIES; BORON-CARBIDE; MICROSTRUCTURE; OXIDATION; BEHAVIOR; ADDITIONS; SPS;
D O I：
10.1016/j.scriptamat.2008.12.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Systematic studies were carried out on the sintering of ZrB2 SiC ceramics without any external pressure being applied. The densities, mechanical properties and microstructures with different contents of B4C were investigated. The results showed that B4C additions were beneficial not only for the sintering process but also for the oxidation resistance. The sintered ZrB2-SiC ceramics with 0.4 wt.% B4C addition had an average strength of 382 +/- 24 MPa and a modulus of 405 +/- 34 GPa. The hardness and toughness were 13.4 +/- 0.4 GPa and 3.7 +/- 10.2 MPa m(1/2), respectively. The effect of B4C addition on the oxidation resistance of ZrB2-SiC was studied by observing the mass changes and the residual strengths of samples after oxidized treatments. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：559 / 562
页数：4
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