The transformation of graphitic onions to diamond under electron irradiation

• Florian Banhart

  Max-Planck-Institut für Metallforschung, Institut für Physik, Heisenbergstr. 1, D-70569 Stuttgart, Germany

抄録

Diamond crystals nucleate in the centers of spherical concentric-shell graphitic particles where high pressure prevails under electron irradiation at specimen temperatures above 900 K. The diamond crystals grow under further irradiation until the graphitic particles have wholly transformed to diamond. Hence, the conversion of the graphitic structure to diamond starts at high pressure and proceeds at decreasing, possibly even at zero, pressure. The experiment is carried out in a transmission electron microscope which enables us to monitor this phase transformation in situ on an atomic scale. It is shown that the graphite/diamond system under electron irradiation is highly dissipative. This suggests that the phase transformation at low pressure occurs via self-organization under nonequilibrium conditions.

収録刊行物

• Journal of Applied Physics

  Journal of Applied Physics 81 (8), 3440-3445, 1997-04-15

  AIP Publishing

キーワード

• General Physics and Astronomy

詳細情報

• CRID: 1361137043650298112
• NII論文ID: 30015844437
• NII書誌ID: AA00693547
• DOI: 10.1063/1.365040
• ISSN: 10897550
• ISSN: 00218979
• Web Site: https://pubs.aip.org/aip/jap/article-pdf/81/8/3440/18691140/3440_1_online.pdf
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