Universal Biot number determining stress duration and susceptibility of ceramic cylinders to quenching

Universal Biot number determining stress duration and susceptibility of ceramic cylinders to quenching
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通用毕奥数决定陶瓷圆柱体的应力持续时间和淬火敏感性

DOI:
10.1080/14786430903459709
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发表时间:
2010-04
影响因子:
1.6
通讯作者:
--
中科院分区:
材料科学3区
文献类型:
--
作者:

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从理论上得到了一个普适的毕奥数,它不仅描述了陶瓷圆柱体的淬火敏感性,而且决定了陶瓷圆柱体在热冲击过程中承受热应力的持续时间。分析表明,当毕奥数大于临界值时,陶瓷圆柱体的热冲击破坏是一个快速的过程,只发生在初始热传导阶段。研究结果为热结构工程陶瓷材料的选择提供了指导,特别是热冲击。
A universal Biot number, which not only describes the susceptibility of ceramic cylinders to quenching but also determines the duration that ceramic cylinders are subjected to thermal stress during thermal shock, is theoretically obtained. The analysis proves that thermal shock failure of ceramic cylinders with a Biot number greater than the critical value is a rapid process, which only occurs in the initial heat conduction regime. The results provide a guide to the selection of ceramic materials for thermostructural engineering, with particular reference to thermal shock.
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