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首页> 外文期刊>Journal of thermal stresses >UNIFIED THERMAL SHOCK RESISTANCE OF ULTRA-HIGH TEMPERATURE CERAMICS UNDER DIFFERENT THERMAL ENVIRONMENTS
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UNIFIED THERMAL SHOCK RESISTANCE OF ULTRA-HIGH TEMPERATURE CERAMICS UNDER DIFFERENT THERMAL ENVIRONMENTS

机译：不同热环境下高温陶瓷的统一抗热震性能

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摘要

The thermal shock resistance (TSR) of the ultra-high temperature ceramic (UHTC) plate under convective environments is studied. The critical failure temperature difference has a danger temperature range about the thermal shock initial temperature. However, the critical failure dimension/ess time decreases as the thermal shock initial temperature increases. The TSR of UHTCs is susceptible to thermal environments. The heat transfer condition shows its advantage in representing the TSR of UHTCs under different thermal environments. Universal conclusions about the TSR of UHTCs under different thermal environments are drawn using heat transfer condition. Three types of critical heat transfer condition that respectively correspond to the first, second, and third type thermal boundary conditions are introduced to characterize the TSR of UHTCs under different thermal environments similar to using various types of strength in representing the fracture-resistance abilities of the materials under different loads. The critical heat transfer condition is applied to the TSR of the UHTC plate under active cooling. The critical heat transfer condition is susceptible to the difference of the thermal shock initial temperature and the coolant temperature.
机译：研究了对流环境下超高温陶瓷（UHTC）板的抗热震性（TSR）。临界故障温度差的危险温度范围约为热冲击初始温度。但是，随着热冲击初始温度的升高，临界失效尺寸/失效时间减小。 UHTC的TSR易受热环境的影响。传热条件显示了其在不同热环境下代表UHTC的TSR的优势。利用传热条件得出了在不同热环境下UHTC的TSR的普遍结论。引入分别对应于第一，第二和第三类型热边界条件的三种类型的临界传热条件，以表征在不同热环境下UHTC的TSR，类似于使用各种类型的强度来表示UHTC的抗断裂性能。不同负载下的材料。在主动冷却条件下，将临界传热条件应用于UHTC板的TSR。临界传热条件容易受到热冲击初始温度和冷却剂温度之差的影响。

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