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

C. H. Yu; M. W. Bird; C. W. Huang; C. S. Chen; Y. F. Gao; K. W. White; C. H. Hsueh

doi:10.1016/j.jeurceramsoc.2014.07.020

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

C. H. Yu, M. W. Bird, C. W. Huang, C. S. Chen, Y. F. Gao, K. W. White, C. H. Hsueh

Department of Engineering Science

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

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.

Original language	English
Pages (from-to)	4145-4155
Number of pages	11
Journal	Journal of the European Ceramic Society
Volume	34
Issue number	16
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2014.07.020
Publication status	Published - 2014

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2014.07.020

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

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.",

author = "Yu, {C. H.} and Bird, {M. W.} and Huang, {C. W.} and Chen, {C. S.} and Gao, {Y. F.} and White, {K. W.} and Hsueh, {C. H.}",

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T1 - Micromechanics modeling of creep fracture of zirconium diboride-silicon carbide composites at 1400-1700°C

AU - Yu, C. H.

AU - Bird, M. W.

AU - Huang, C. W.

AU - Chen, C. S.

AU - Gao, Y. F.

AU - White, K. W.

AU - Hsueh, C. H.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

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

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