The Effect of Particle Size Distribution on the Microstructure and the Mechanical Properties of Boron Carbide-Based Reaction-Bonded Composites

被引：60

作者：

Hayun, Shmuel ^{[1
]}

Weizmann, Amir ^{[1
]}

Dariel, Moshe P. ^{[1
]}

Frage, Nahum ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Dept Mat Engn, IL-84105 Beer Sheva, Israel

来源：

INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY | 2009年 / 6卷 / 04期

关键词：

DENSIFICATION; POROSITY;

D O I：

10.1111/j.1744-7402.2008.02290.x

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 presence of unreacted, free silicon lowers the mechanical properties of reaction-bonded boron carbide. The fraction of free silicon can be reduced by increasing the green density of the initial boron carbide performs. The use of multimodal boron carbide mixtures allows attaining 75% green density. After reaction bonding with molten silicon, the composites consist of four phases, namely the original B4C particles, the B-12(B,C,Si)(3) phase, product of the dissolution-precipitation process, beta-SiC, and residual Si. The volume fraction of residual Si in the composites is in the 8-10% range. The infiltrated composites display elevated values of the mechanical properties with a high Weibull modulus.

引用

页码：492 / 500

页数：9

共 23 条

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