Inherent issues regarding the use of in situ x-ray diffraction measurements to determine temperature in shock-compressed metals

被引：5
|
作者：
Sharma, Surinder M. [1 ]
Gupta, Yogendra M. [1 ,2 ]
机构：
[1] Washington State Univ, Inst Shock Phys, Pullman, WA 99164 USA
[2] Washington State Univ, Dept Phys & Astron, Pullman, WA 99164 USA
来源：
PHYSICAL REVIEW B | 2021年 / 104卷 / 06期
关键词：
DEBYE-WALLER FACTORS; COPPER; IRON;
D O I：
10.1103/PhysRevB.104.064113
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Temperature determination in shock-compressed solids constitutes an important and long-standing scientific need. Since the reduction of Bragg diffracted peaks due to temperature increase, using the Debye-Waller factor, is well established, we examined the use of this approach to determine temperatures in shock-compressed gold and platinum by representing the shocked state as a superposition of density and temperature changes. Comparison of the calculated and measured diffraction peaks did not show good agreement, because x-ray diffraction (XRD) profiles in the shock-compressed state are not governed solely by density and temperature changes. XRD results are also influenced measurably by shock wave induced microstructural changes. Our results demonstrate that contributions from microstructural changes need to be incorporated and modeled in the theoretical analysis to use XRD measurements for reliable temperature determination in shock-compressed solids.
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页数：8
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