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Open AccessArticle

Theoretical Research on Thermal Shock Resistance of Ultra-High Temperature Ceramics Focusing on the Adjustment of Stress Reduction Factor

1
State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Environmental Science, Chongqing University, Chongqing 400030, China
2
State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China
*
Author to whom correspondence should be addressed.
Materials 2013, 6(2), 551-564; https://doi.org/10.3390/ma6020551
Received: 27 November 2012 / Revised: 30 January 2013 / Accepted: 31 January 2013 / Published: 18 February 2013
(This article belongs to the Special Issue Ultra-high Temperature Ceramics)
The thermal shock resistance of ceramics depends on not only the mechanical and thermal properties of materials, but also the external constraint and thermal condition. So, in order to study the actual situation in its service process, a temperature-dependent thermal shock resistance model for ultra-high temperature ceramics considering the effects of the thermal environment and external constraint was established based on the existing theory. The present work mainly focused on the adjustment of the stress reduction factor according to different thermal shock situations. The influences of external constraint on both critical rupture temperature difference and the second thermal shock resistance parameter in either case of rapid heating or cooling conditions had been studied based on this model. The results show the necessity of adjustment of the stress reduction factor in different thermal shock situations and the limitations of the applicable range of the second thermal shock resistance parameter. Furthermore, the model was validated by the finite element method. View Full-Text
Keywords: ultra-high temperature ceramics; stress reduction factor; the second thermal shock resistance parameter; constraint ultra-high temperature ceramics; stress reduction factor; the second thermal shock resistance parameter; constraint
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MDPI and ACS Style

Li, D.; Li, W.; Li, D.; Shi, Y.; Fang, D. Theoretical Research on Thermal Shock Resistance of Ultra-High Temperature Ceramics Focusing on the Adjustment of Stress Reduction Factor. Materials 2013, 6, 551-564.

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