A study of grain boundaries in a binderless cemented carbide

被引：45

作者：

Engqvist, H

Botton, GA

Axén, N

Hogmark, S

机构：

[1] Uppsala Univ, Angstrom Lab, Dept Mat Sci, S-75121 Uppsala, Sweden

[2] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 1998年 / 16卷 / 4-6期

关键词：

cemented carbides; binderless carbides; TEM; EELS; grain boundaries;

D O I：

10.1016/S0263-4368(98)00034-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of a binderless cemented carbide with <0.5 wt% Co has been analysed using transmission electron microscopy (TEM) in combination with an electron energy loss spectroscopy (EELS) detector and an imaging filter. In particular, microstructural properties of the grain boundaries were studied. The analysis identified different kinds of grain boundaries in the material: boundaries between WC grains containing nanometre-thick layers of Co; WC-WC grain boundaries with perfect lattice matching and no or very small amounts of Co; and boundaries between WC and TiC grains containing high amounts of C, but no Co. The influence of the grain boundaries on the mechanical properties is discussed. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：309 / 313

页数：5

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