期刊
JOURNAL OF APPLIED PHYSICS
卷 91, 期 4, 页码 1957-1962出版社
AMER INST PHYSICS
DOI: 10.1063/1.1433181
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Graphitization of {100} and {111} faces of diamond crystals at pressures of 0.1 and 2 GPa and various temperatures was studied by Raman spectroscopy, x-ray single crystal diffractometry, and scanning electron microscopy. Different primary mechanisms of graphitization are discussed: (a) normal growth of graphite layer by detachment of single atoms from {100} and {111} diamond surfaces and (b) lateral growth of graphite on the {111} surface by breaking off groups of atoms followed by their rearrangement into planar graphitic structures. The growth of oriented graphite crystallites was observed only on the {111} diamond faces and at p=2 GPa. In the case of synthetic diamonds, internal graphitization was observed and explained in terms of catalytic effects on the metal inclusions. (C) 2002 American Institute of Physics.
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