Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 35, Issue 10, Pages 2957-2962Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2015.03.025
Keywords
ZrB2-SiC composites; Temperature; Fracture strength; Model
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Funding
- National Natural Science Foundation of China [11172336, 11472066]
- Program for New Century Excellent Talents in University [ncet-13-0634]
- Fundamental Research Funds for the Central Universities [CDJZR 14328801]
- Chongqing Natural Science Foundation [cstc2013jcyjA50018]
- State Key Lab for Strength and Vibration of Mechanical Structures of Xi' an Jiaotong University [SV2014-KF-15]
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In this paper, based on a temperature dependent fracture surface energy model and the traditional Griffith fracture theories, a new temperature dependent fracture strength model for the ZrB2-SiC composites is developed. The combined effects of temperature, grain size, microflaw size and residual stress on the strength of ZrB2-SiC composites are included in the new model. According to the model, the temperature dependent fracture strength of materials can be easily predicted using some basic material parameters. The model is verified at different temperatures by comparison with experimental data of different ZrB2-SiC composites. Excellent agreement is obtained between predicted and experimental data of fracture strength of ZrB2-SiC composites. (C) 2015 Elsevier Ltd. All rights reserved.
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