MECHANICAL-PROPERTIES OF BETA-SI3N4-WHISKER SI3N4-MATRIX COMPOSITES

被引：24

作者：

HOMENY, J

NEERGAARD, LJ

机构：

[1] Department of Materials Science and Engineering—Ceramics Division, University of Illinois, Urbana, Illinois

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 11期

关键词：

composites; fracture toughness; mechanical properties; silicon nitride; whiskers;

D O I：

10.1111/j.1151-2916.1990.tb06482.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：

Composites containing 30 vol%β‐Si3N4 whiskers in a Si3N4 matrix were fabricated by hot‐pressing. The composites exhibited fracture toughness values between 7.6 and 8.6 MPa · m1/2, compared to 4.0 MPa · m1/2 for unreinforced polycrystalline Si3N4. The improvements in fracture toughness were attributed to crack wake effects, i.e., whisker bridging and pullout mechanisms. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：3493 / 3496

页数：4

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