Reaction-Bonded B4C with High Hardness

被引：15
|
作者：
Li, Xiaoguang [1 ]
Jiang, Dongliang [1 ]
Zhang, Jingxian [1 ]
Zhu, Yunzhou [1 ]
Chen, Zhongming [1 ]
Huang, Zhengren [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2016年 / 13卷 / 03期
基金：
中国国家自然科学基金;
关键词：
MECHANICAL-PROPERTIES; BORON-CARBIDE; SILICON-CARBIDE; MICROSTRUCTURE; COMPOSITES; EVOLUTION; PACKING;
D O I：
10.1111/ijac.12507
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：
Reaction-bonded B4C (RBBC) was fabricated through molten Si infiltrating porous B4C preforms. A preform with a 75% relative green density was obtained by mixing two different sized B4C powders. Carbon black added to the preform slightly reduces average pore size, but increases porosity. RBBC ceramics showed a dense and homogeneous microstructure. Vickers hardness was about 15 GPa for RBBC fabricated from a single type of B4C powder and could reach 22-23 GPa for the carbon-added samples after infiltration. Morphological evolution and the influence of the microstructure on the Vickers hardness were investigated and discussed.
引用
收藏
页码：584 / 592
页数：9
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