TY - JOUR

T1 - Step Patterns on {100} Faces of Diamond Crystals As-Grown in Mg-Based Systems

AU - Khokhryakov, Alexander F.

AU - Palyanov, Yuri N.

AU - Borzdov, Yuri M.

AU - Kozhukhov, Anton S.

AU - Shcheglov, Dmitriy V.

PY - 2018/1/3

Y1 - 2018/1/3

N2 - In this article, we report the unusual growth of diamond crystals produced in Mg-C and Mg-Ge-C systems at high-pressure, high-temperature conditions. We have found that the growth of the habit {100} faces occurs by deposition of a substance (carbon) on two nonequivalent {100} and {111} surfaces. Precipitation of carbon atoms on the (100) plane occurs by elementary layers with a thickness of about 0.1 and 0.2 nm. The change in the density of elementary steps leads to the formation of step bunches that transform into faceted macrostates with an increase in their thickness of more than 400 nm. The maximum inclination angle of macrostep ends corresponds to the {111} faces position. As a result, singular stable {111} microfacets are formed at the ends of the macrosteps, which themselves grow layer by layer. The deposition of carbon on {100} and {111} surfaces of one simple form of diamond crystals leads to the zonal structure of {100} growth sectors.

AB - In this article, we report the unusual growth of diamond crystals produced in Mg-C and Mg-Ge-C systems at high-pressure, high-temperature conditions. We have found that the growth of the habit {100} faces occurs by deposition of a substance (carbon) on two nonequivalent {100} and {111} surfaces. Precipitation of carbon atoms on the (100) plane occurs by elementary layers with a thickness of about 0.1 and 0.2 nm. The change in the density of elementary steps leads to the formation of step bunches that transform into faceted macrostates with an increase in their thickness of more than 400 nm. The maximum inclination angle of macrostep ends corresponds to the {111} faces position. As a result, singular stable {111} microfacets are formed at the ends of the macrosteps, which themselves grow layer by layer. The deposition of carbon on {100} and {111} surfaces of one simple form of diamond crystals leads to the zonal structure of {100} growth sectors.

KW - HIGH-TEMPERATURE CONDITIONS

KW - MAGNESIUM-BASED SYSTEMS

KW - HIGH-PRESSURE

KW - SYNTHETIC DIAMONDS

KW - SINGLE-CRYSTAL

KW - SURFACE

KW - MORPHOLOGY

UR - http://www.scopus.com/inward/record.url?scp=85040165252&partnerID=8YFLogxK

U2 - 10.1021/acs.cgd.7b01025

DO - 10.1021/acs.cgd.7b01025

M3 - Article

AN - SCOPUS:85040165252

VL - 18

SP - 152

EP - 158

JO - Crystal Growth and Design

JF - Crystal Growth and Design

SN - 1528-7483

IS - 1

ER -