Oxidation resistance and strength retention of ZrB2-SiC ceramics

被引：97
|
作者：
Guo, Wei-Ming [1 ]
Zhang, Guo-Jun [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 11期
基金：
中国国家自然科学基金;
关键词：
B Microstructure; C Strength; ZrB2-SiC; Oxidation; Kinetics; DIBORIDE-SILICON-CARBIDE; ZIRCONIUM; COMPOSITES; CONVECTION; TRANSPORT; BEHAVIOR; KINETICS;
D O I：
10.1016/j.jeurceramsoc.2010.01.028
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：
Oxidation behavior and effect of oxidation on the room-temperature flexural strength were Investigated for ZrB2-10 vol% SiC (ZB10S) and ZrB2-30 vol% SiC (ZB30S) in air at 1500 degrees C with times ranging from 0.5 h to 10 h The oxide scale of both ZB10S and ZB30S was composed of an outer glassy layer and an inner extended SIC-depleted layer The changes in weight gain, glass layer thickness, and extended SIC-depleted layer thickness with oxidation were measured Analysis suggested that the extended SIC-depleted layer was most indicative for evaluating the oxidation resistance Compared to the ZB10S, the Improved oxidation resistance in ZB30S was attributed to the viscosity increase of glassy layer and the lower number of ZrO2 inclusions in the glassy layer. Because of the healing of surface flaws by the glassy layer, the strength increased significantly by similar to 110% for ZB10S and by similar to 130% for ZB30S after oxidation for 0.5 h. (C) 2010 Elsevier Ltd All rights reserved
引用
收藏
页码：2387 / 2395
页数：9
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