期刊
CERAMICS INTERNATIONAL
卷 38, 期 1, 页码 831-835出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.06.046
关键词
Creep; ZrB2-SiC; Four-point flexure; Microstructure; Cavitations
资金
- National Natural Science Foundation of China [50632070]
- Chinese Academy of Sciences
- Science and Technology Commission of Shanghai [09ZR1435500]
Four-point flexure creep deformation of ZrB2-30 vol% SiC ceramics in argon atmosphere under a static load of 19 MPa for 0-100 h at 1500 and 1600 degrees C was investigated. The strain rate at 1600 degrees C was 3.7 times higher than that at 1500 degrees C. Microstructural evolution during creep consisted of nucleation and growth of triple-point cavitations which were always associated with SiC particles. Due to the low stress, only isolated cavitations were nucleated, and no microcracks were formed. For up to 100 h at 1500 and 1600 degrees C, the grains maintained their size and shape. The cavitations in both size and number showed no obvious difference from 26 to 100 h at 1500 degrees C, whereas that showed a significant increase from 26 to 100 h at 1600 degrees C. Present study suggested that ZrB2-30 vol% SiC exhibited relatively good microstructural stability and creep resistance at 1500 degrees C in argon atmosphere. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据