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ファイル
言語
英語
著者
Morikawa, Kimihiko Department of Physics and Materials Science, Shimane University
Suzuki, Kazuya Department of Physics and Materials Science, Shimane University
Fujimori, Akane Department of Radiological Technology, Tsukuba International University
Takano, Shuntarou Department of Physics, Kanazawa University
Nakano, Satoshi Ultra-High Pressure Group, National Institute for Materials Science
Okamoto, Hiroyuki School of Health Sciences, Kanazawa University
内容記述(抄録等)
Three-dimensional (3D) X-ray topography was used to characterize diamond anvil crystals before and after application of ultra-high pressure at 50, 70 and 99.4 GPa. The diffraction planes examined and the wavelength of the monochromatic X-rays were (004), (333), {224}, {440} and 0.0521 nm, respectively. Images of lattice defects in the diamond crystals were reconstructed by stacking approximately 500 X-ray limited projection topographs using the image processing software Image J. The 3D structures and nature of the lattice defects were identified from the reconstructed topographs. A pyramidal shape of four parts of stacking faults was identified using the visibility or invisibility of defect images with each diffraction plane. No significant changes of the lattice defects in the diamond crystals were observed under pressurization at 70 GPa. However, one of the anvil crystals shaped from the same rough crystal was broken into pieces at 99.4 GPa. The fracture stress is very low value rather than the calculated one based on (111) [110] slip system mechanism. In the broken crystal, the center line of plurality of the pyramidal shape of stacking faults differed in the location from the culet area. The breaking of diamond crystal was dependent on the distribution of plane defects in the crystal.
主題
diamond
X-ray topography
anvil crystal
high pressure
lattice defect
掲載誌名
Transactions of the Materials Research Society of Japan
44
4
開始ページ
143
終了ページ
148
ISSN
1382-3469
ISSN(Online)
2188-1650
発行日
2019/08/01
DOI
出版者
一般社団法人 日本MRS
出版者ヨミ
イッパン シャダン ホウジン ニホン MRS
資料タイプ
学術雑誌論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
総合理工学部
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