Micromechanics modeling of creep fracture of zirconium diboride-silicon carbide composites at 1400-1700 °C

被引：17
|
作者：
Yu, C. H. [1 ]
Bird, M. W. [2 ]
Huang, C. W. [3 ]
Chen, C. S. [1 ]
Gao, Y. F. [4 ]
White, K. W. [2 ]
Hsueh, C. H. [5 ,6 ]
机构：
[1] Natl Taiwan Univ, Dept Civil Engn, Taipei 10764, Taiwan
[2] Univ Houston, Dept Mech Engn, Houston, TX 77004 USA
[3] Chung Yuan Christian Univ, Dept Civil Engn, Chungli, Taiwan
[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[6] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 10617, Taiwan
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 16期
基金：
美国国家科学基金会;
关键词：
Creep fracture; Finite element analysis; Micromechanics; Cavitation; Grain boundary sliding; MECHANICAL-PROPERTIES; DIFFUSIVE CAVITATION; ZRB2-SIC COMPOSITE; GRAIN; MICROSTRUCTURE; CERAMICS; STRENGTH; DEFORMATION; OXIDATION; BEHAVIOR;
D O I：
10.1016/j.jeurceramsoc.2014.07.020
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 creep deformation of the ultra-high temperature ceramic composite ZrB2-20%SiC at temperatures from 1400 to 1700 degrees C was studied by a micromechanical mode in which the real microstructure was adopted in finite element simulations. Based on the experiment results of the change of activation energy with respect to the temperature, a mechanism shift from diffusional creep-control for temperatures below 1500 degrees C to grain boundary sliding-control for temperatures above 1500 degrees C was concluded from simulations. Also, the simulation results revealed the accommodation of grain rotation and grain boundary sliding by grain boundary cavitation for creep at temperatures above 1500 degrees C which was in agreement with experimental observations. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4145 / 4155
页数：11
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