Graphitization of natural diamond crystals: A morphological study

Graphitization of natural diamond crystals: A morphological study Full article

Journal

International Journal of Refractory Metals and Hard Materials
ISSN: 0263-4368

Output data

Year: 2025, Volume: 133, Pages: 107346 Pages count : 1 DOI: 10.1016/j.ijrmhm.2025.107346

Authors

Bokhonov Boris B. ¹ , Batraev Igor S. ² , Dudina Dina V. ^1,2 , Sharafutdinov Marat R. ^1,3

Affiliations

1	Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str. 18, 630090, Novosibirsk, Russia
2	Lavrentyev Institute of Hydrodynamics SB RAS, Lavrentyev Ave. 15, Novosibirsk, 630090, Novosibirsk, Russia
3	Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Nikolsky Prosp., 1, Kol’tsovo, 630559, Russia

In the present work, the morphological changes of flat-facet and curved-facet diamond microcrystals of natural origin during vacuum annealing at 1800 ◦C were studied. It was found that the morphological changes caused by graphitization of natural diamond microcrystals are very similar to those observed in the case of synthetic diamond microcrystals. The formation of graphite during annealing of the flat-facet natural diamond microcrystals starts from the edges of the crystals. However, when the curved-facet crystals are annealed, graphite forms over the entire surface of the crystals at the same time. The results of the present work confirm the presence of orientation relationships between the parent diamond and the graphite forming upon annealing.

Bokhonov B.B. , Batraev I.S. , Dudina D.V. , Sharafutdinov M.R.
Graphitization of natural diamond crystals: A morphological study
International Journal of Refractory Metals and Hard Materials. 2025. V.133. P.107346. DOI: 10.1016/j.ijrmhm.2025.107346

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