In situ observation of the phase transformation kinetics of bismuth during shock release

李江涛 ¹王倩男 ¹徐亮 ¹柳雷 ²张航 ¹Sota Takagi ³Kouhei Ichiyanagi ⁴Ryo Fukaya ⁴Shunsuke Nozawa ⁴胡建波¹

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作者信息

1. Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China;State Key Laboratory for Environment-Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China
2. Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China
3. Japan Society for the Promotion of Science,Tokyo,102-0083,Japan;Institute of Materials Structure Science,High Energy Accelerator Research Organization(KEK),Ibaraki,305-8572,Japan
4. Institute of Materials Structure Science,High Energy Accelerator Research Organization(KEK),Ibaraki,305-8572,Japan
折叠

Abstract

A time-resolved x-ray diffraction technique is employed to monitor the structural transformation of laser-shocked bismuth.Results reveal a retarded transformation from the shock-induced Bi-V phase to a metastable Bi-Ⅳ phase during the shock release,instead of the thermodynamically stable Bi-Ⅲ phase.The emergence of the metastable Bi-Ⅳ phase is understood by the competitive interplay between two transformation pathways towards the Bi-Ⅳ and Bi-Ⅲ,respectively.The former is more rapid than the latter because the Bi-Ⅴ to B-Ⅳ transformation is driven by interaction between the closest atoms while the Bi-V to B-Ⅲ transformation requires interaction between the second-closest atoms.The nucleation time for the Bi-Ⅴ to Bi-Ⅳ transformation is determined to be 5.1±0.9 ns according to a classical nucleation model.This observation demonstrates the importance of the formation of the transient metastable phases,which can change the phase transformation pathway in a dynamic process.

Key words

phase transformation/time-resolved x-ray diffraction(XRD)/bismuth/metastable phase/nonequi-librium phase diagram

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基金项目

国家自然科学基金(12072331)

Science Challenge Project(TZ2018001)

Japan Society for the Promotion of Science(17H04820)

Japan Society for the Promotion of Science(21H01677)

Foundation of the United Laboratory of High-Pressure Physics and Earthquake Science()

Photon Factory Program Advisory Committee(2016S2-006)

Photon Factory Program Advisory Committee(2020G680)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

参考文献量48

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