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Diamond microcrystallites formation through the phase transition graphite→liquid→diamond
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- Відділення фізики і астрономії
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- Semiconductor Physics Quantum Electronics & Optoelectronics
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- Semiconductor Physics Quantum Electronics & Optoelectronics, 2006, том 9
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- Semicond. Physics Quantum Electronics & Optoelectronics, 2006, № 1
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Diamond microcrystallites formation through the phase transition graphite→liquid→diamond
Інший ID:
PACS 81.05.Uw
Посилання:
Diamond microcrystallites formation through the phase transition graphite→liquid→diamond / T.V. Semikina // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2006. — Т. 8, № 1. — С. 22-28. — Бібліогр.: 19 назв. — англ.
Підтримка:
The author wish to thank Dr Y. Takagi for opening up
the opportunities to work in the research group in the
Department of Environmental and Materials Science,
Teikyo University of Science & Technology, Japan as
well as for technical supporting the experiments. The
author thanks students T. Hirai and T. Kawai for their
assistance and collaboration in the common
experimental work for growing the diamonds. The
author also thanks Dr A.I. Kutsay (Institute of Superhard
Materials, NANU, Kiev), M.G. Dusheyko and
Yu.V. Yasievich (National Technical University of
Ukraine “KPI”, Kiev) and Professor V.G. Litovchenko
(Institute of Semiconductor Physics, NANU, Kiev) for
the discussion of some parts of this work.
Дата:
2006
Переглядів:
592
Завантажень:
291
Анотація:
The paper presents the results of synthesizing the diamond microparticles (3 to 5 µm) in a spark discharge in hydrogen at the low pressure (100 Torr). The obtained growth rate ~5 µm/s is uniquely high. Our analysis of the nature of particles by using SEM and Raman spectroscopy demonstrates that these particles are cubic high quality diamond. Using the result of SIM images after cross-cutting of the sample by FIB, it is concluded that diamond does not grow on the substrate and running process is not CVD. Discussing the theory of the spark discharge, it is suggested that the process occurs at high pressures and temperatures. A hypothesis of diamond formation through a diffusion mechanism of the direct phase transition is presented.
