Transonic Dislocation Propagation in Diamond
Abstract
The motion of line defects (dislocations) has been studied for over 60 years but the maximum speed at which they can move is unresolved. Recent models and atomistic simulations predict the existence of a limiting velocity of dislocation motions between the transonic and subsonic ranges at which the self-energy of dislocation diverges, though they do not deny the possibility of the transonic dislocations. We use femtosecond x-ray radiography to track ultrafast dislocation motion in shock-compressed single-crystal diamond. By visualizing stacking faults extending faster than the slowest sound wave speed of diamond, we show the evidence of partial dislocations at their leading edge moving transonically. Understanding the upper limit of dislocation mobility in crystals is essential to accurately model, predict, and control the mechanical properties of materials under extreme conditions.
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Cite
@article{arxiv.2303.04370,
title = {Transonic Dislocation Propagation in Diamond},
author = {Kento Katagiri and Tatiana Pikuz and Lichao Fang and Bruno Albertazzi and Shunsuke Egashira and Yuichi Inubushi and Genki Kamimura and Ryosuke Kodama and Michel Koenig and Bernard Kozioziemski and Gooru Masaoka and Kohei Miyanishi and Hirotaka Nakamura and Masato Ota and Gabriel Rigon and Youichi Sakawa and Takayoshi Sano and Frank Schoofs and Zoe J. Smith and Keiichi Sueda and Tadashi Togashi and Tommaso Vinci and Yifan Wang and Makina Yabashi and Toshinori Yabuuchi and Leora E. Dresselhaus-Marais and Norimasa Ozaki},
journal= {arXiv preprint arXiv:2303.04370},
year = {2023}
}