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

页码：584 / 592

页数：9

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