CREEP-BEHAVIOR OF A SIC-WHISKER-REINFORCED ALUMINA

被引：56

作者：

LIN, HT

BECHER, PF

机构：

[1] Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 05期

关键词：

alumina; composites; creep; silicon carbide; whiskers;

D O I：

10.1111/j.1151-2916.1990.tb05208.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：

Creep tests in four‐point flexure loading configuration in air employing applied stresses of 37 to 300 MPa at temperatures of 1200°, 1300°, and 1400°C were performed on 20‐vol%‐SiC‐whisker‐reinforced alumina and unreinforced single‐phase polycrystalline alumina. The creep rate of polycrystalline alumina was significantly reduced through the addition of SiC whiskers, although strain to failure was lower. Transmission and scanning electron microscopy results suggest that substantial increase in the creep resistance in flexure of alumina composites originates from the retardation of grain‐boundary sliding by the SiC whiskers. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：1378 / 1381

页数：4

共 19 条

[1]

Becher P. F., 1986, FRACTURE MECHANICS C, P61

[2]

BECHER PF, 1984, J AM CERAM SOC, V67, pC267, DOI 10.1111/j.1151-2916.1984.tb19694.x

[3]

BECHER PF, 1988, ADV CERAM MATER, V3, P148

[4] TOUGHENING BEHAVIOR IN WHISKER-REINFORCED CERAMIC MATRIX COMPOSITES [J].