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arXiv · 2604.01566

Abrupt crystallization from shock-compressed CaSiO3 glass

A. Amouretti·K. Nonaka·X. Liu·Y. Hironaka·H. Huang·R. Kodama·K. Lawler·K. Miyanishi·H. Nakamura·C. Schwartz·Y. Seto·K. Sueda·Y. Wu·M. Yabashi·T. Yabuuchi·N. Ozaki
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Abstract

We have performed in situ time-resolved X-ray diffraction at ~100 GPa on laser-shocked CaSiO3 glass to investigate the glass-to-crystal transition. At this extreme pressure, we observe the ultrafast crystallization of the CaSiO3 perovskite structure from the compressed amorphous phase, with a typical nucleation time of 1.69 +/- 0.10 ns and a final grainsize of ~20 nm. The grain size temporal evolution suggest a diffusion controlled transformation. Moreover, the observed concomitant explosive grain growth together with the release wave arrival into shocked CaSiO3 also suggests a role of the release in the nucleation process.

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A. Amouretti, K. Nonaka, X. Liu, Y. Hironaka, H. Huang, R. Kodama, K. Lawler, K. Miyanishi, H. Nakamura, C. Schwartz, Y. Seto, K. Sueda, Y. Wu, M. Yabashi, T. Yabuuchi, N. Ozaki. 2026-04-02. Abrupt crystallization from shock-compressed CaSiO3 glass. https://arxiv.org/abs/2604.01566

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