Assessing microstructure changes in potassium dihydrogen phosphate crystals induced by mechanical stresses
Assessing microstructure changes in potassium dihydrogen phosphate crystals induced by mechanical stresses
复制标题
评估机械应力引起的磷酸二氢钾晶体的微观结构变化
DOI：
10.1016/j.scriptamat.2015.10.002
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发表时间：
2016-03-01
影响因子：
6
通讯作者：
Zhang, Feihu
中科院分区：
文献类型：
--
作者：
Hou, Ning;Zhang, Yong;Zhang, Feihu
本文提出了一种利用掠入射x射线衍射技术进行损伤表征的新方法。结果表明，加工后的磷酸二氢钾（KDP）晶体在浅次表层存在晶格错位结构。位错运动是KDP从单晶到错位晶结构演变的主要机制。这些发现可以确定通过超精密加工生产的KDP组件的较低激光损伤阈值（LDT）的潜在原因。(C) 2015 Elsevier Ltd.版权所有。
This paper proposes a new way of damage characterization with the aid of the grazing incidence X-ray diffraction technique. The results showed that a machined potassium dihydrogen phosphate (KDP) crystal contains a lattice misalignment structure in its shallow subsurface layer. Dislocation motions are the primary mechanism of the structural evolution from the KDP's monocrystalline to the misaligned crystalline structure. These findings allow to identify the underlying causes of lower laser damage threshold (LDT) of KDP components produced by ultra-precision machining. (C) 2015 Elsevier Ltd. All rights reserved.