Graphite-to-diamond transformation induced by ultrasound cavitation

Diamond microcrystals have been synthesized using ultrasonic cavitation of a suspension of hexagonal graphite in various organic liquid media, at an average bulk temperature of the liquid up to 120°C and at atmospheric pressure. The yield of diamond is up to 10% by mass. The diamonds were characteri...

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Bibliographic Details
Published in:Diamond and related materials 2008-06, Vol.17 (6), p.931-936
Main Authors: Khachatryan, A.Kh, Aloyan, S.G., May, P.W., Sargsyan, R., Khachatryan, V.A., Baghdasaryan, V.S.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Crystalline state (including molecular motions in solids)
Crystallographic aspects of phase transformations
pressure effects
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Microcrystalline diamond
Physics
Specific materials
Structure of solids and liquids
crystallography
Ultrasound cavitation
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Summary:Diamond microcrystals have been synthesized using ultrasonic cavitation of a suspension of hexagonal graphite in various organic liquid media, at an average bulk temperature of the liquid up to 120°C and at atmospheric pressure. The yield of diamond is up to 10% by mass. The diamonds were characterized by scanning electron microscopy, X-ray diffraction and laser Raman spectroscopy. Analysis of the crystallite size distribution showed that the diamonds were nearly mono-dispersed, having a size 6 or 9μm ± 0.5μm, with cubic, crystalline morphology.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2008.01.112