Fracture strength of the particulate-reinforced ultra-high temperature   ceramics based on a temperature dependent fracture toughness model

doi:10.1016/j.jmps.2017.07.012

CORC > 北京大学 > 工学院

	Fracture strength of the particulate-reinforced ultra-high temperature ceramics based on a temperature dependent fracture toughness model
	Wang, Ruzhuan ; Li, Weiguo ; Ji, Baohua ; Fang, Daining
刊名	JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
	2017
关键词	fracture fracture toughness microstructures ceramic material Temperature dependent model SILICON CARBIDE CERAMICS MECHANICAL-PROPERTIES ZRB2-SIC COMPOSITES BRITTLE SOLIDS THERMAL-SHOCK SIC CERAMICS GRAIN-SIZE ZIRCONIUM BEHAVIOR MICROSTRUCTURE
DOI	10.1016/j.jmps.2017.07.012
英文摘要	The particulate-reinforced ultra-high temperature ceramics (pUHTCs) have been particularly developed for fabricating the leading edge and nose cap of hypersonic vehicles. They have drawn intensive attention of scientific community for their superior fracture strength at high temperatures. However, there is no proper model for predicting the fracture strength of the ceramic composites and its dependency on temperature. In order to account for the effect of temperature on the fracture strength, we proposed a concept called energy storage capacity, by which we derived a new model for depicting the temperature dependent fracture toughness of the composites. This model gives a quantitative relationship between the fracture toughness and temperature. Based on this temperature dependent fracture toughness model and Griffith criterion, we developed a new fracture strength model for predicting the temperature dependent fracture strength of pUHTCs at different temperatures. The model takes into account the effects of temperature, flaw size and residual stress without any fitting parameters. The predictions of the fracture strength of pUHTCs in argon or air agreed well with the experimental measurements. Additionally, our model offers a mechanism of monitoring the strength of materials at different temperatures by testing the change of flaw size. This study provides a quantitative tool for design, evaluation and monitoring of the fracture properties of pUHTCs at high temperatures. (C) 2017 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [11472066, 11602044, 11672050]; Program for New Century Excellent Talents in University [ncet-13-0634]; SCI(E); ARTICLE; 365-378; 107
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/470697]
专题	工学院
推荐引用方式 GB/T 7714	Wang, Ruzhuan,Li, Weiguo,Ji, Baohua,et al. Fracture strength of the particulate-reinforced ultra-high temperature ceramics based on a temperature dependent fracture toughness model[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2017.
APA	Wang, Ruzhuan,Li, Weiguo,Ji, Baohua,&Fang, Daining.(2017).Fracture strength of the particulate-reinforced ultra-high temperature ceramics based on a temperature dependent fracture toughness model.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS.
MLA	Wang, Ruzhuan,et al."Fracture strength of the particulate-reinforced ultra-high temperature ceramics based on a temperature dependent fracture toughness model".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS (2017).