Microstructural characterization of commercial hot-pressed boron carbide ceramics

被引：140

作者：

Chen, MW ^{[1
]}

McCauley, JW

LaSalvla, JC

Hemker, KJ

机构：

[1] Tohoku Univ, Mat Res Inst, Sendai, Miyagi 9808577, Japan

[2] Johns Hopkins Univ, Dept Engn Mech, Baltimore, MD 21218 USA

[3] USA, Res Lab, Aberdeen Proving Ground, MD 21005 USA

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2005年 / 88卷 / 07期

关键词：

D O I：

10.1111/j.1551-2916.2005.00346.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：

Two commercial hot-pressed boron carbide ceramics were investigated by transmission electron microscopy. Atomic-scale observations suggest that the grain boundaries of the two materials are free of grain-boundary films. Two triple-junction phases were found and characterized to be rhombohedral Fe2B103 and orthorhombic Ti3B4. In addition, intra-granular precipitates, AIN, Mo-2(C, B) and graphite, were identified and found to have coherent relationships with the boron carbide matrix. Micron-scale inclusions were also observed and most of them were determined to be graphite. The formation mechanisms of the secondary phases and their possible influence on mechanical properties are also discussed.

引用

页码：1935 / 1942

页数：8

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