Formation and crystal structure of metallic inclusions in a HPHT as-grown diamond single crystal |
| |
| Authors: | L-W Yin N-W Wang Z-D Zou M-S Li D-S Sun P-Z Zheng Z-Y Yao |
| |
| Institution: | (1) College of Materials Science and Engineering, Shandong University of technology, Jinan 250061, P.R. China, CN;(2) Shandong College of Architecture, Jinan 250014, P.R. China, CN |
| |
| Abstract: | One of the most important characteristics associated with crystal growth technology is the entrapment of inclusions by the
growing crystal. Diamond single crystals prepared under high temperature-high pressure (HPHT) usually contain metallic inclusions.
In the present paper, metallic inclusions in a diamond grown from a Fe-Ni-C system using the HPHT method have been, for the
first time, systematically examined by transmission electron microscopy (TEM). Energy dispersive X-ray spectrometry (EDS)
, combined with selected area electron diffraction (SAD) patterns, has been used to identify the chemical composition and
crystal structure of the metallic inclusions. The metallic inclusions were found to be composed mainly of cubic γ-(FeNi),
face-centered cubic (FeNi)23C6, ortho-rhombic Fe3C and hexagonal Ni3C, which may have been formed through the entrapment of molten catalyst by the growth front or through reaction of the trapped
melt with contaminants in the diamond.
Received: 19 June 2000 / Accepted: 21 June 2000 / Published online: 16 August 2000 |
| |
| Keywords: | PACS: 61 72 – y 61 72 Qq 61 16 Bg |
| 本文献已被 SpringerLink 等数据库收录！ |
|
