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

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

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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.

phase transformationtime-resolved x-ray diffraction(XRD)bismuthmetastable phasenonequi-librium phase diagram

李江涛、王倩男、徐亮、柳雷、张航、Sota Takagi、Kouhei Ichiyanagi、Ryo Fukaya、Shunsuke Nozawa、胡建波

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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

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

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国家自然科学基金Science Challenge ProjectJapan Society for the Promotion of ScienceJapan Society for the Promotion of ScienceFoundation of the United Laboratory of High-Pressure Physics and Earthquake SciencePhoton Factory Program Advisory CommitteePhoton Factory Program Advisory Committee

12072331TZ201800117H0482021H016772016S2-0062020G680

2024

10.1088/1674-1056/ad0ec6

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
年,卷(期)：2024.33(4)
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