Morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature

Morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature Full article

Journal

Diamond and Related Materials
ISSN: 1879-0062 , E-ISSN: 0925-9635

Output data

Year: 2025, Volume: 155, Article number : 112377, Pages count : 8 DOI: 10.1016/j.diamond.2025.112377

Authors

Chepurov A.A. ¹ , Zhimulev E.I. ¹ , Barabash E.O. ¹ , Goryainov S.V. ¹ , Gromilov S.A. ^2,3 , Sonin V.M. ¹ , Gryaznov I.A. ¹ , Afanasiev V.P. ¹ , Chepurov A.I. ¹ , Turkin A.I. ¹

Affiliations

1	V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
2	A.V. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
3	Novosibirsk State University, 630090 Novosibirsk, Russia

The aim of the present experiment is to study the morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature (HPHT). As initial samples, near colorless flattened impact diamond crystals from the Popigai astrobleme (Yakutia) were selected. The experiments were performed using a split-sphere multi-anvil high-pressure apparatus at 6 GPa and 1450◦С, which correspond to a diamond stability field. It was found that at the HPHT conditions a contact of lonsdaleite-bearing diamond with Ni–Fe melt leads to the formation of complex layered textures which are a combination of dissolution of impact diamond and growth of a cubic diamond phase. The textures gradually transform into an aggregate of microcrystals in a subparallel orientation. The obtained results are substantial for the development of abrasive tools at HPHT conditions using impact diamonds.

Chepurov A.A. , Zhimulev E.I. , Barabash E.O. , Goryainov S.V. , Gromilov S.A. , Sonin V.M. , Gryaznov I.A. , Afanasiev V.P. , Chepurov A.I. , Turkin A.I.
Morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature
Diamond and Related Materials. 2025. V.155. 112377 :1-8. DOI: 10.1016/j.diamond.2025.112377 WOS OpenAlex

Submitted:	Mar 12, 2025
Accepted:	Apr 26, 2025
Published online:	Apr 26, 2025
Published print:	May 1, 2025

Web of science:	WOS:001485002700001
OpenAlex:	W4409839233

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