Research output: Contribution to journal › Article › peer-review
Morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature. / Chepurov, A. I.; Zhimulev, E. I.; Barabash, E. O. et al.
In: Diamond and Related Materials, Vol. 155, 112377, 05.2025.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Morphological transformation of impact diamond crystals after interaction with metal melt at high pressure and high temperature
AU - Chepurov, A. I.
AU - Zhimulev, E. I.
AU - Barabash, E. O.
AU - Goryainov, S. V.
AU - Gromilov, S. A.
AU - Sonin, V. M.
AU - Gryaznov, I. A.
AU - Afanasiev, V. P.
AU - Chepurov, A. I.
AU - Turkin, A. I.
N1 - This research was supported by the Russian Science Foundation grant no. 25-23-00045.
PY - 2025/5
Y1 - 2025/5
N2 - 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[sbnd]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.
AB - 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[sbnd]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.
KW - High pressure high temperature
KW - Impact diamond
KW - Lonsdaleite
KW - Morphology
KW - Popigai astrobleme
UR - https://www.mendeley.com/catalogue/5382bee9-85a0-37cf-8553-fe5b4a2cc208/
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105003778163&origin=inward&txGid=31f460383fed02f5e55fd5be01189d05
U2 - 10.1016/j.diamond.2025.112377
DO - 10.1016/j.diamond.2025.112377
M3 - Article
VL - 155
JO - Diamond and Related Materials
JF - Diamond and Related Materials
SN - 0925-9635
M1 - 112377
ER -
ID: 66120269