Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1474269 | Journal of the European Ceramic Society | 2014 | 11 Pages |
Abstract
The creep deformation of the ultra-high temperature ceramic composite ZrB2–20%SiC at temperatures from 1400 to 1700 °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 °C to grain boundary sliding-control for temperatures above 1500 °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 °C which was in agreement with experimental observations.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
C.H. Yu, M.W. Bird, C.W. Huang, C.S. Chen, Y.F. Gao, K.W. White, C.H. Hsueh,