Revealing the mechanical properties of potassium dihydrogen phosphate crystals by nanoindentation

Revealing the mechanical properties of potassium dihydrogen phosphate crystals by nanoindentation
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通过纳米压痕揭示磷酸二氢钾晶体的机械性能

DOI:
10.1557/jmr.2016.91
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发表时间:
2016-03
影响因子:
2.7
通讯作者:
Liu W. D.
Liu W. D.
中科院分区:
材料科学4区
文献类型:
--
作者:
Zhang Y.;Zhang L. C.;Liu M.;Zhang F. H.;Mylvaganam K.;Liu W. D.

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磷酸二氢钾(KDP)是一种重要的非线性光学晶体材料,用于激光系统中的光变频器和Pockels光电开关。然而,KDP容易断裂,易潮解,在温度变化下会发生微观结构变化。因此,KDP一直是最难处理的材料之一,但其性质尚未被很好地了解。本文旨在利用Berkovich金刚石压头的纳米压痕技术,详细研究KDP晶体的力学性能。研究发现,机械加工引起的亚表面损伤很容易改变KDP的力学性能。还发现KDP晶体在微/纳米尺度的变形过程中是一种粘弹塑性材料,尽管它在宏观上是非常脆性的。
Potassium dihydrogen phosphate (KDP) is an important nonlinear optical crystal material for light frequency converters and Pockels photoelectric switches in laser systems. However, KDP is apt to fracture, is deliquescent, and can suffer from microstructural changes under a temperature variation. As such, KDP has been one of the most difficult-to-handle materials, but its properties have not been well understood. This paper aims to explore the mechanical properties of KDP crystals in detail with the aid of the nanoindentation technique using a Berkovich diamond indenter. It was found that the mechanical properties of KDP can be easily altered by machining-induced subsurface damage. It was also discovered that a KDP crystal is a visco-elasto-plastic material during micro/nanoscale deformation, although it is very brittle macroscopically.
DOI: 10.1117/12.240416
发表时间: 1996-05
期刊: --
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作者:
V. I. Salo;L. V. Atroschenko;S. V. Garnov;N. V. Khodeyeva
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