Shock-Induced Melting and Recrystallization of MoO3Studied by Dynamic X-Ray Diffraction

Autor: Kishimura, H., Kawai, N., Miyanishi, K., Sueda, K., Yabuuchi, T., Nakamura, H., Amouretti, A., Ozaki, N., Aimi, A., Ichiyanagi, K.
Zdroj: Journal of Dynamic Behavior of Materials; 20240101, Issue: Preprints p1-12, 12p
Abstrakt: Molybdenum(VI) oxide (MoO3) is a promising semiconductor material that can be used in several functional applications. Understanding the structural response of MoO3under high-pressure and high-temperature conditions is important for designing a material used in device applications. An X-ray free electron laser (XFEL) enables the structural response under extreme conditions to be probed at the nanosecond timescale. We describe laser-driven shock compression experiments on MoO3using an XFEL to directly observe the structural evolution of MoO3. When a laser-driven shock wave arrives at a pressure of 61 GPa, MoO3melts immediately and remains in the molten state for a few nanoseconds. Rapid recrystallization to the α-MoO3phase and a high-pressure phase MoO3-II is also observed on nanosecond timescales during pressure release. Our results provide insights into the kinetic and phase transition under shock compression and represent the advancement toward the understanding structural response of MoO3under high-pressure, high-temperature conditions, which has not been studied.
Databáze: Supplemental Index
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