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

doi:10.1103/PhysRevLett.125.185701

Shock Response of Full Density Nanopolycrystalline Diamond

Phys Rev Lett. 2020 Oct 30;125(18):185701. doi: 10.1103/PhysRevLett.125.185701.

Authors

Kento Katagiri^{1

2}, Norimasa Ozaki^{1

2}, Yuhei Umeda^{1

3}, Tetsuo Irifune^{4

5}, Nobuki Kamimura¹, Kohei Miyanishi⁶, Takayoshi Sano², Toshimori Sekine^{1

7}, Ryosuke Kodama^{1

2}

Affiliations

¹ Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan.
² Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan.
³ Institute for Planetary Materials, Okayama University, Tottori 682-0193, Japan.
⁴ Geodynamics Research Center, Ehime University, Ehime 790-0826, Japan.
⁵ Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 145-0061, Japan.
⁶ RIKEN SPring-8 Center, Hyogo 679-5148, Japan.
⁷ Center for High-Pressure Science and Technology Advanced Research, Shanghai 201203, China.

PMID: 33196243
DOI: 10.1103/PhysRevLett.125.185701

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.