Formation of Co-capping during sintering of straight WC-10 wt% Co

被引：23
|
作者：
Guo, Jun [1 ]
Fan, Peng [1 ]
Wang, Xu [1 ]
Fang, Zhigang Zak [1 ]
机构：
[1] Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2010年 / 28卷 / 03期
关键词：
Co-capping; Cemented carbide; Functionally graded materials; Liquid redistribution; Composition gradient; GRADED WC-CO; EQUILIBRIUM DISTRIBUTION; COBALT GRADIENT; LIQUID; COMPOSITES; MIGRATION; CARBIDES; SIZE;
D O I：
10.1016/j.ijrmhm.2009.11.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Co-capping is a term that refers to a thin layer of Co occasionally observed on the surface of sintered WC-Co parts. It is usually considered undesirable and needs to be removed. The mechanism of its formation has been a myth in the industry and not fully understood to date. In this study, the effects of several factors, including cooling rate, atmosphere and carbon content in specimens, on the formation of Co-capping during sintering of straight WC-Co materials were experimentally examined. The mechanism of Co-capping formation was discussed based on the principles of liquid-phase migration. (C) 2009 Elsevier Ltd. All rights reserved.
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页码：317 / 323
页数：7
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