Phase composition and distribution of Ni-, Co-, Fe-, Mn-, and Cr-based inclusions in carbonade polycrystals

被引：1

作者：

Kuzin, NN ^{[1
]}

机构：

[1] Russian Acad Sci, Vereshchagin Inst High Pressure Phys, Troitsk 142092, Moscow Oblast, Russia

来源：

INORGANIC MATERIALS | 2001年 / 37卷 / 01期

关键词：

Graphite; Carbide; Inorganic Chemistry; Solid Solution; Phase Composition;

D O I：

10.1023/A:1026725108477

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase composition and distribution of inclusions of the Ni, Co, Fe, Mn, and Cr metal catalysts in carbonade polycrystals 8 mm in diameter were studied. The polycrystals (>90 wt % diamond) were found to contain inclusions of solid solutions of carbon in Ni and Co and the carbides Fe3C, Mn5C2, and Cr3C2. The concentration of inclusions was shown to increase with distance from the catalyst insert. The results are interpreted in terms of the model for the growth of polycrystalline diamond via corrugation of graphite layers, their dissolution in the catalyst melt owing to structural matching with its fee lattice, and stabilization of the diamond structure at high supersaturations in the p-T stability region of diamond.

引用

页码：31 / 33

页数：3