DYNAMIC FRACTURE CHARACTERIZATION OF AL2O3 AND SICW/AL2O3

被引：8

作者：

DEOBALD, LR ^{[1
]}

KOBAYASHI, AS ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT MECH ENGN,SEATTLE,WA 98195

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 10期

关键词：

D O I：

10.1111/j.1151-2916.1992.tb05519.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 dynamic stress intensity factors, which were determined with newly developed bar impact facilities and a new data reduction procedure, for an Al2O3 ceramic and 29 vol% SiCw/Al2O3 composite were virtually identical, thus indicating that the short SiC whiskers were ineffective under dynamic fracture. SEM studies revealed five distinct fracture morphologies with increased percentage area of transgranular fracture in both materials with rapid crack propagation. Also, the high dynamic stress intensity factor caused multiple microscopic crack planes to form and then join as the crack advanced.

引用

页码：2867 / 2870

页数：4

共 12 条

[1]

DEOBALD LR, 1991, THESIS U WASHINGTON

[2]

DEOBALD LR, IN PRESS EXP MECH

[3]

JENKINS MG, 1987, AM CERAM SOC BULL, V66, P1734

[4] BRITTLENESS DEPENDENCE OF CRACK BRANCHING IN CERAMICS [J].