Abstract The effects of cooling rate and initial temperature on thermal shock behavior of ZrB2-SiC ceramic were studied by water spraying method with a thermocouple real-time temperature acquisition technique for the first time. It was shown that the cooling rate could be adjusted by changing the water flow rate, and the fracture behavior strongly depended on both the cooling rate and initial temperature. When the extreme value of cooling rate was constant, the decrease of initial temperature would lead to the increase of thermal stress, accompanied by a more serious damage of material, which was mainly because of the nonlinear relationship between thermal expansion coefficient and temperature.

中文翻译：

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冷却速度和初始温度对ZrB 2 -SiC陶瓷热震性能的评价

摘要 首次采用喷水法和热电偶实时温度采集技术研究了冷却速度和初始温度对ZrB2-SiC陶瓷热震行为的影响。结果表明，冷却速度可以通过改变水流量来调节，断裂行为强烈依赖于冷却速度和初始温度。当冷却速率极值一定时，初始温度的降低会导致热应力的增加，同时材料的损伤更为严重，这主要是由于热膨胀系数与温度的非线性关系所致。