Research output: Contribution to journal › Article › peer-review
Unusual growth macrolayers on {100} faces of diamond crystals from magnesium-based systems. / Khokhryakov, Alexander F.; Nechaev, Denis V.; Palyanov, Yuri N.
In: Journal of Crystal Growth, Vol. 455, 01.12.2016, p. 76-82.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Unusual growth macrolayers on {100} faces of diamond crystals from magnesium-based systems
AU - Khokhryakov, Alexander F.
AU - Nechaev, Denis V.
AU - Palyanov, Yuri N.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - We studied unusual growth macrolayers on the {100} faces of diamond crystals grown in Mg-C and Mg0.9Ge0.1-C systems at 7.0 GPa and in the temperature range of 1800–1900 °C. The layers were shaped as rectangles highly elongated in one of the [110] directions. The layer elongation (length to width ratio) was different, but did not exceed 23. We found that the ends of the macrolayers in most cases were composed of {111} microfacets, and their growth occurred by layers along these microfacets. Using selective etching, we found that the macrolayers were not associated with outcrops of dislocations and any planar defects on the {100} faces. It is supposed that the formation of these highly elongated layers occurs by two-dimensional nucleation that becomes possible at high carbon supersaturation under conditions of kinetically limited diamond growth in Mg-based systems.
AB - We studied unusual growth macrolayers on the {100} faces of diamond crystals grown in Mg-C and Mg0.9Ge0.1-C systems at 7.0 GPa and in the temperature range of 1800–1900 °C. The layers were shaped as rectangles highly elongated in one of the [110] directions. The layer elongation (length to width ratio) was different, but did not exceed 23. We found that the ends of the macrolayers in most cases were composed of {111} microfacets, and their growth occurred by layers along these microfacets. Using selective etching, we found that the macrolayers were not associated with outcrops of dislocations and any planar defects on the {100} faces. It is supposed that the formation of these highly elongated layers occurs by two-dimensional nucleation that becomes possible at high carbon supersaturation under conditions of kinetically limited diamond growth in Mg-based systems.
KW - A1.Crystal morphology
KW - A1.Etching
KW - A2.Single crystal growth
KW - B1.Diamond
UR - http://www.scopus.com/inward/record.url?scp=84990063312&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2016.10.004
DO - 10.1016/j.jcrysgro.2016.10.004
M3 - Article
AN - SCOPUS:84990063312
VL - 455
SP - 76
EP - 82
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
ER -
ID: 25724230