Shock Response of Full Density Nanopolycrystalline Diamond

Kento Katagiri, Norimasa Ozaki, Yuhei Umeda, Tetsuo Irifune, Nobuki Kamimura, Kohei Miyanishi, Takayoshi Sano, Toshimori Sekine, Ryosuke Kodama

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Hugoniot of full-dense nanopolycrystalline diamond (NPD) was investigated up to 1600 GPa. The Hugoniot elastic limit of NPD is 208 (±14) GPa, which is more than twice as high as that of single-crystal diamond. The Hugoniot of NPD is stiffer than that of single-crystal diamond up to 500 GPa, while no significant difference is observed at higher pressures where the elastic precursor is overdriven by a following plastic wave. These findings confirm that the grain boundary strengthening effect recognized in static compression experiments is also effective against high strain-rate dynamic compressions.

    Original languageEnglish
    Article number185701
    JournalPhysical Review Letters
    Volume125
    Issue number18
    DOIs
    Publication statusPublished - Oct 28 2020

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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