突破金刚石流动强度的极限
材料科学
2025-11-04 v3
摘要
极端压强与温度所创造的条件使即便坚硬而脆性的材料也能发生塑性变形。尽管已有广泛研究，流动强度（抵抗塑性流动的能力）的上限仍不确定，且在相关应力下驱动变形的机制尚存争议。利用飞秒原位X射线衍射实验与大规模分子动力学模拟，我们证明层错介导的强化使冲击压缩纳米多晶金刚石在227±8 GPa应力下达到107±5 GPa的峰值流动强度。我们的结果表明，极端条件可通过可用作定向应用中设计工具的机制释放异常强度。
引用
@article{arxiv.2208.03416,
title = {Pushing the limits of flow strength in diamond},
author = {Anirudh Hari and Kento Katagiri and Wanghui Li and Dorian P. Luccioni and Rayen Lin and Sophie E. Parsons and Zipeng Xu and Rohit Hari and Tharun Reddy and Ernest W. Cubit and Alexis Amouretti and Jon H. Eggert and Yuichi Inubushi and Tetsuo Irifune and Sara J. Irvine and Ryosuke Kodama and Michel Koenig and Laura Madril and Takeshi Matsuoka and Kohei Miyanishi and Hirotaka Nakamura and Norimasa Nishiyama and Takuo Okuchi and Masato Ota and Toshimori Sekine and Yusuke Seto and Toru Shinmei and Keiichi Sueda and Yoshinori Tange and Sota Takagi and Tadashi Togashi and Yuhei Umeda and Yifan Wang and Makina Yabashi and Toshinori Yabuuchi and Norimasa Ozaki and Leora E. Dresselhaus-Marais},
journal= {arXiv preprint arXiv:2208.03416},
year = {2025}
}