Diffusion coefficient of carbon in Fe-Ni alloy during synthesis of diamond under high temperature and high pressure
Journal
Ceramics International
Journal Volume
39
Journal Issue
8
Pages
8861-8864
Date Issued
2013
Author(s)
Abstract
Synthetic diamond particles were prepared under high temperature and high pressure using arrayed seeds. A dense Fe-Ni alloy shell covered each diamond seed during synthesis; the growth of diamond particles was controlled by the diffusion of carbon through the metallic shell. The diffusion coefficient of carbon through Fe-Ni melt at 1600 K and 5.5 GPa is about 5×10-6 cm2/s, with an activation energy for diffusion of 336 kJ/mol. © 2013 Elsevier Ltd and Techna Group S.r.l.
Type
journal article