3D Residual Strain in DKDP Crystals by Neutron Diffraction

被引：7

作者：

Liu, Fafu ^{[1
,2
]}

Sun, Xun ^{[2
]}

Sun, Guangai ^{[3
]}

Cao, Jianwu ^{[1
]}

Mu, Xiaoming ^{[1
,2
]}

Guo, Zaizai ^{[1
]}

Yuan, Qingxi ^{[4
]}

机构：

[1] Inner Mongolia Met Mat Res Inst, Natl Key Lab Sci & Technol Mat Shock & Impact, Baotou 014000, Peoples R China

[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Shandong, Peoples R China

[3] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 21999, Sichuan, Peoples R China

[4] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China

来源：

CRYSTAL RESEARCH AND TECHNOLOGY | 2019年 / 54卷 / 09期

基金：

中国国家自然科学基金;

关键词：

deuterium-doped KDP; DKDP crystal; KH2PO4; neutron diffraction; residual strain; X-RAY-DIFFRACTION; KH2PO4; KDP; STRESS;

D O I：

10.1002/crat.201900022

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Neutron diffraction technique is applied to study the three-dimensional (3D) residual strains in K(H1-xDx)(2)PO4 (DKDP) crystals with various deuterium contents (0 <= x <= 0.99). It is found that the residual strains in the crystalline coordinate are at the magnitude of 10(-3) to 10(-4). The results show that the level of the macro-strain in the crystal bulk is independent of the deuteration level. However, when the deuteration level is below 50%, the average of micro-strain increases first with the increasing of deuteration level, then decreases when the deuteration level is in excess of 50%. According to the residual strains, the internal stresses are calculated through sigma(ij) = C-ijkl epsilon(kl). Finally, the potential sources of the stresses in crystals are discussed and analyzed.

引用

页数：6

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