作者：Mototsugu Sakai;

作者单位：Department of Materials Science, Toyohashi University of Technology Tempaku-cho, Toyohashi-shi, Aichi-ken 441-8580

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2006-01-05

卷：26

期：3

起页：247

止页：255

分类号：TQ175

语种：英文

关键词：

内容简介

The fracture mechanics parameters for characterizing thermal shock failures and damages are very essential in designing high-performance refractory materials that are subjected to high-temperatures which may vary across the components and also may rapidly change with time. Accordingly, the thermo-physical fundamentals of these fracture mechanics parameters as well as their quantitative evaluation in laboratories have always been the central issues in the researches and developments of high-performance refractory materials". The characteristic mechanical parameters for controlling the resistances to the thermal shock fracture/damage of refractory materials include the failure strength, Young's modulus, fracture energy (fracture toughness), thermal expansion coefficient, and the thermal conductivity. Furthermore, the boundary conditions of thermal/mechanical constraints, pre-existing defects/cracks as the failure origin, and the geometries and dimensions of refractory bricks also critically affect the resistances to thermal shock fracture/damage.