It has been a tremendous challenge to manufacture damage-free and smooth surfaces of potassium dihydrogen phosphate (KDP) crystals to meet the requirements of high-energy laser systems. The intrinsic issue is whether a KDP crystal can be plastically deformed so that the material can be removed in a ductile mode during the machining of KDP. This study investigates the room temperature creep-deformation of KDP crystals with the aid of nanoindentation. A stress analysis was carried out to identify the creep mechanism. The results showed that KDP crystals could be plastically deformed at the nanoscale. Dislocation motion is responsible for creep-deformation. Both creep rate and creep depth decrease with decrease in peak force and loading rate. Dislocation nucleation and propagation bring about pop-ins in the loaddisplacement curves during nanoindentation.
The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-018-0234-9
Yong Zhang
,
Ning Hou
,
Liang-Chi Zhang
. Investigation into the room temperature creep-deformation of potassium dihydrogen phosphate crystals using nanoindentation[J]. Advances in Manufacturing, 2018
, 6(4)
: 376
-383
.
DOI: 10.1007/s40436-018-0234-9
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