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Thermal-mechanical modeling of nodular defect embedded within multilayer coatings

机译:多层涂层中埋藏的结核缺陷的热力学模型

摘要

The initiation of laser damage within optical coatings can be better understood by thermal-mechanical modeling of coating defects. The result of this modeling shows that a high-temperature rise and thermal stress can be seen just inside the nodular defect compared to surrounding coating layers. The temperature rise and thermal stress tend to increase with seed diameter. Shallower seed tend to cause higher temperature rise and greater thermal stress. There is a critical seed depth at which thermal stress is largest. The composition of the seed resulting from different coating-material emission during evaporation can affect the temperature rise and thermal stress distribution.
机译:通过对涂层缺陷进行热力学建模,可以更好地理解光学涂层中激光损伤的产生。该模型的结果表明,与周围的涂层相比,刚好在球状缺陷内部可以看到高温升高和热应力。温度升高和热应力倾向于随种子直径的增加而增加。较浅的种子往往会导致较高的温度升高和较大的热应力。在临界种子深度处,热应力最大。蒸发过程中不同涂料释放出的种子成分会影响温度升高和热应力分布。

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