Open AccessTHE DIFFUSION AND DISTRIBUTION OF CATALYST METAL NICKEL IN POLYCRYSTAL DIAMOND GROWN UNDER ULTRA HIGH PRESSURE
Author(s) -
Cheng Yue-Ying,
Chen Jing-Zhang,
Liangchen Chen
Publication year - 1980
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.29.1507
Subject(s) - materials science , nickel , catalysis , diffusion , metal , diamond , phase (matter) , layer (electronics) , chemical engineering , composite material , metallurgy , thermodynamics , chemistry , biochemistry , physics , organic chemistry , engineering
Under the pressure of 77 kb, double layer structure always appears in the polycrystal diamond grown with wireform catalyst. The distribution of catalyst metal nickel in specimen has been in vestigated.The appearence of partial precipitate peak of catalyst metal has been explained by means of the forced diffusion equation of phase transformation growth. The cause of the presence of metal partial precipitated zone, the relationship between the double layer structure and the P-T growth region have also been discussed.