Pushing the limits of flow strength in diamond

Anirudh Hari; Kento Katagiri; Wanghui Li; Dorian P. Luccioni; Rayen Lin; Sophie E. Parsons; Zipeng Xu; Rohit Hari; Tharun Reddy; Ernest W. Cubit II; Alexis Amouretti; Jon H. Eggert; Yuichi Inubushi; Tetsuo Irifune; Sara J. Irvine; Ryosuke Kodama; Michel Koenig; Laura Madril; Takeshi Matsuoka; Kohei Miyanishi; Hirotaka Nakamura; Norimasa Nishiyama; Takuo Okuchi; Masato Ota; Toshimori Sekine; Yusuke Seto; Toru Shinmei; Keiichi Sueda; Yoshinori Tange; Sota Takagi; Tadashi Togashi; Yuhei Umeda; Yifan Wang; Makina Yabashi; Toshinori Yabuuchi; Norimasa Ozaki; Leora E. Dresselhaus-Marais

arXiv · 2208.03416

Pushing the limits of flow strength in diamond

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Abstract

Extreme pressures and temperatures create conditions that allow even hard and brittle materials to deform plastically. Despite extensive research, the upper limits of flow strength, the resistance to plastic flow, remain uncertain, and the mechanisms driving deformation at the relevant stresses are a subject of debate. Using femtosecond in situ X-ray diffraction experiments and large-scale molecular dynamics simulations, we demonstrate that stacking fault-mediated strengthening enables shock-compressed nano-polycrystalline diamond to achieve a peak flow strength of 107+-5 GPa at a stress of 227+-8 GPa. Our findings show that extreme conditions can unlock unusual strength via mechanisms that can be used as design tools in targeted applications.

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Anirudh Hari, Kento Katagiri, Wanghui Li, Dorian P. Luccioni, Rayen Lin, Sophie E. Parsons, Zipeng Xu, Rohit Hari, Tharun Reddy, Ernest W. Cubit II, Alexis Amouretti, Jon H. Eggert, Yuichi Inubushi, Tetsuo Irifune, Sara J. Irvine, Ryosuke Kodama, Michel Koenig, Laura Madril, Takeshi Matsuoka, Kohei Miyanishi, Hirotaka Nakamura, Norimasa Nishiyama, Takuo Okuchi, Masato Ota, Toshimori Sekine, Yusuke Seto, Toru Shinmei, Keiichi Sueda, Yoshinori Tange, Sota Takagi, Tadashi Togashi, Yuhei Umeda, Yifan Wang, Makina Yabashi, Toshinori Yabuuchi, Norimasa Ozaki, Leora E. Dresselhaus-Marais. 2022-08-06. Pushing the limits of flow strength in diamond. https://arxiv.org/abs/2208.03416

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