Graphical method for analyzing wide-angle x-ray diffraction

Chen, X. H.; Xue, Tao; Liu, DongBing; Qi, Yang; Bin, Luo; Li, Mu; Li, Xiaoya; Li, Jun

doi:10.1063/1.5003452

Cited by 5 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…构 [12][13][14][15]24] , 背光靶距离样品约28 mm, 且与样品法国内外已对金属钒的高压相图开展了大量实验和理论研究. 早期的研究认为金属钒在极高的压力下保持体心立方晶格结构不变 [25] , 但在2007年, Ding等 [26] 结合同步辐射X射线衍射技术以及金刚石对顶砧静高压技术, 发现金属钒在63-69 GPa 时晶体结构由体心立方结构转变至菱方结构, 即体心立方结构的钒(110)峰劈裂成菱方结构钒( ) 和( )峰.…”

Section: 由于材料力学特性是进行工程结构安全、可靠unclassified

In situ observation of phase transition in polycrystalline under high-pressure high-strain-rate shock compression by X-ray diffraction

Chen¹,

Tan²,

Xue³

et al. 2020

Acta Phys. Sin.

Self Cite

View full text Add to dashboard Cite

The knowledge of phase transition of material under dynamic loading is an important area of research in inertial confinement fusion and material science. Though the shock-induced phase transitions of various materials over a broad pressure range have become a field of study for decades, the loading strain rates in most of these experiments is not more than <inline-formula><tex-math id="M2">\begin{document}$ {10^{6}}\;{{\rm{s}}^{ - 1}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20200929_M2.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20200929_M2.png"/></alternatives></inline-formula>. However, in contrast with the strain rate range where the phase diagram is a good predictor of the crystal structure of a material, at higher strain rate (<inline-formula><tex-math id="M3">\begin{document}$ > {10^{6}}\;{{\rm{s}}^{ - 1}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20200929_M3.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20200929_M3.png"/></alternatives></inline-formula>) the phase diagram measured can be quite different not only in shifting the boundary line between various phases, but also in giving a different sequence of crystal structure. High-power laser facility can drive shock wave and simultaneously provide a precisely synchronized ultra-short and ultra-intense X-ray source. Here, based on the Prototype laser facility, an in situ X-ray diffraction platform for diagnosing shock-induced phase transition of polycrystalline material is established. The in situ observation of material phase transition under high-strain-rate shock loading is carried out with typical metals of vanadium and iron. Diffraction results are consistent with vanadium remaining in the body-centered-cubic structure up to 69 GPa, while iron transforms from the body-centered-cubic structure into hexagonal-close-packed structure at 159 GPa. The compressive properties of vanadium and iron obtained in in situ X-ray diffraction experiment are in good agreement with their macroscopic Hugonoit curves. The decrease in the lattice volume over the pressure step period yields a strain rate on the order of <inline-formula><tex-math id="M4">\begin{document}$ {10^{8}} - {10^{9}}\;{{\rm{s}}^{ - 1}} $\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20200929_M4.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="24-20200929_M4.png"/></alternatives></inline-formula>. The available of the presented in situ X-ray diffraction plateform offers the potential to extend our understanding of the kinetics of phase transition in polycrystalline under high-pressure high-strain-rate shock compression.

show abstract

Section: 由于材料力学特性是进行工程结构安全、可靠unclassified

In situ observation of phase transition in polycrystalline under high-pressure high-strain-rate shock compression by X-ray diffraction

Chen¹,

Tan²,

Xue³

et al. 2020

Acta Phys. Sin.

Self Cite

View full text Add to dashboard Cite

show abstract

Transport properties of liquid metals and semiconductors from molecular dynamics simulation with the Kubo-Greenwood formula

Migdal

Zhakhovsky

Yanilkin

et al. 2019

Applied Surface Science

View full text Add to dashboard Cite

Focal construct geometry for high-intensity x-ray diffraction from laser-shocked polycrystalline

Chen¹,

Li²,

Xue³

et al. 2020

Review of Scientific Instruments

View full text Add to dashboard Cite

An increasing number of dynamic experiments, especially those involving laser drive, are employing in situ x-ray diffraction as a probe to interrogate structure evolution between states of matter under extreme pressure and temperature. We present an alternative configuration, focal construct geometry, for in situ x-ray diffraction to measure the structure and evolution of dynamically compressed polycrystalline materials on a laser platform. This configuration makes full use of the isotropically emitted He–α x rays by employing an annular (or semi-annular) collimator rather than a regular pinhole collimator and thus increases the flux of incident x rays reaching the sample as well as the intensity of the diffracted x rays, enabling the detection of a diffraction pattern with less laser energy. Its effectiveness and applicability are validated against the conventional Debye–Scherrer geometry through direct molecular dynamics simulations and x-ray diffraction simulations for two representative shock-induced phase transition events, solid–solid and solid–liquid (or melting). This configuration reproduces all the Debye–Scherrer diffraction profiles in good accuracy and demonstrates superior efficiency in utilizing the isotropic x-ray source and harvesting diffracted x rays while preserving the angular resolution.

show abstract

Graphical method for analyzing wide-angle x-ray diffraction

Cited by 5 publications

References 19 publications

<i>In situ</i> observation of phase transition in polycrystalline under high-pressure high-strain-rate shock compression by X-ray diffraction

<i>In situ</i> observation of phase transition in polycrystalline under high-pressure high-strain-rate shock compression by X-ray diffraction

Transport properties of liquid metals and semiconductors from molecular dynamics simulation with the Kubo-Greenwood formula

Focal construct geometry for high-intensity x-ray diffraction from laser-shocked polycrystalline

Contact Info

Product

Resources

About