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Title
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Formation of amorphous carbon and graphite in CVD diamond upon annealing: A HREM, EELS, Raman and optical study
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Author
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Abstract
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| Polycrystalline diamond thick films were subjected to annealing in vacuum at temperatures of 1350-1450 degreesC. The films were examined by optical absorption, Raman spectroscopy, transmission electron microscopy and electron energy loss spectroscopy. The formation of amorphous carbon and/or of well-crystallized graphite layers up to 20 nm thick was evidenced along grain boundaries. Intra-granular nanometer-sized graphite islands were also observed, sometimes as transformed micro-twin bands. The diamond-to-graphite transition occurs in such a way that three (111) diamond planes transform into two (0002) graphitic sheets. The internal graphitization causes a severe degradation of the optical quality of the diamond films. |
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Language
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English
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Source (journal)
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Physica status solidi: A: applied research. - Berlin
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Source (book)
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6th International Workshop on Surface and Bulk Defects in CVD Diamond, MAR 01-02, 2001, DIEPENBEEK HASSELT, BELGIUM
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Publication
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Berlin
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Wiley-v c h verlag gmbh
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2001
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ISSN
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0031-8965
[print]
1521-396X
[online]
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DOI
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10.1002/1521-396X(200108)186:2<207::AID-PSSA207>3.0.CO;2-U
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Volume/pages
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186
:2
(2001)
, p. 207-214
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ISI
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000170435000006
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Full text (Publisher's DOI)
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