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Morphology of diamond crystals grown in magnesium-based systems at high temperatures and high pressures. / Khokhryakov, Alexander F.; Sokol, Alexander G.; Borzdov, Yuri M. и др.
в: Journal of Crystal Growth, Том 426, 22908, 13.07.2015, стр. 276-282.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Morphology of diamond crystals grown in magnesium-based systems at high temperatures and high pressures
AU - Khokhryakov, Alexander F.
AU - Sokol, Alexander G.
AU - Borzdov, Yuri M.
AU - Palyanov, Yuri N.
PY - 2015/7/13
Y1 - 2015/7/13
N2 - A series of experiments on diamond growth in the Mg45Cu55-C, Mg50Ni50-C, Mg50Cu25Ni25-C, Mg50Ag25Ni25-C and Mg25Cu25Ni50-C systems at a pressure of 6.3 GPa in the temperature range of 1550-1650 °C was conducted. The morphology of diamond crystals and the features of their growth were studied. The {111} and {100} faces, with the cube faces playing the dominant role, were found to be the plane-faced forms of diamond crystal growth. If the magnesium content in the system is 45-50 at%, crystal growth occurs in the regime of inhibition of the {100} faces with the formation of antiskeletal crystals. In case of a constant intensity of the face inhibition up to its complete growing out, the quasi-faces of trapezohedron {311} are formed with striations in the [110] direction. The inhibition of face growth and formation of antiskeletal crystals are related to oxygen inflow from the cell parts and are accompanied by crystallization of magnesium oxide on the diamond surface. A reduction in the magnesium content in the system from 50 to 25 at% or an increase in the temperature leads to the cessation of {100} face inhibition and promotes growth of plane-faced crystals.
AB - A series of experiments on diamond growth in the Mg45Cu55-C, Mg50Ni50-C, Mg50Cu25Ni25-C, Mg50Ag25Ni25-C and Mg25Cu25Ni50-C systems at a pressure of 6.3 GPa in the temperature range of 1550-1650 °C was conducted. The morphology of diamond crystals and the features of their growth were studied. The {111} and {100} faces, with the cube faces playing the dominant role, were found to be the plane-faced forms of diamond crystal growth. If the magnesium content in the system is 45-50 at%, crystal growth occurs in the regime of inhibition of the {100} faces with the formation of antiskeletal crystals. In case of a constant intensity of the face inhibition up to its complete growing out, the quasi-faces of trapezohedron {311} are formed with striations in the [110] direction. The inhibition of face growth and formation of antiskeletal crystals are related to oxygen inflow from the cell parts and are accompanied by crystallization of magnesium oxide on the diamond surface. A reduction in the magnesium content in the system from 50 to 25 at% or an increase in the temperature leads to the cessation of {100} face inhibition and promotes growth of plane-faced crystals.
KW - A1. Crystal morphology
KW - A1. Impurities
KW - A2. Single crystal growth
KW - B1. Diamond
UR - http://www.scopus.com/inward/record.url?scp=84937549040&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2015.06.022
DO - 10.1016/j.jcrysgro.2015.06.022
M3 - Article
AN - SCOPUS:84937549040
VL - 426
SP - 276
EP - 282
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
M1 - 22908
ER -
ID: 25726978