Pseudopartial wetting of WC/WC grain boundaries in cemented carbides

被引：53

作者：

Straumal, B. B. ^{[1
,2
,3
,4
]}

Konyashin, I. ^{[3
,5
]}

Ries, B. ^{[5
]}

Straumal, A. B. ^{[1
,3
]}

Mazilkin, A. A. ^{[1
,2
]}

Kolesnikova, K. I. ^{[1
,3
]}

Gusak, A. M. ^{[6
]}

Baretzky, B. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow District, Russia

[2] Karlsruher Inst Technol, Inst Nanotechnol, Eggenstein Leopoldshafen, Germany

[3] Natl Univ Sci & Technol MISIS, Moscow, Russia

[4] State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi, Russia

[5] Element Six GmbH, Tech Dev Ctr, Burghaun, Germany

[6] Cherkasy Natl Univ, Dept Theoret Phys, Cherkassy, Ukraine

来源：

MATERIALS LETTERS | 2015年 / 147卷

基金：

俄罗斯基础研究基金会;

关键词：

Phase transitions; Cemented carbides; Grain boundaries; Wetting; PHASE-TRANSITION; CU; ALLOYS; SYSTEM; FILMS;

D O I：

10.1016/j.matlet.2015.02.029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WC-Co cemented carbides are metal-ceramic composites consisting of a ceramic phase, tungsten carbide, and a cobalt binder. The key to the exceptional properties of cemented carbides is the optimal combination of hardness and wear-resistance of WC grains, and toughness and ductility of the Co-based matrix. However, only the minority of WC/WC GBs are completely wetted by Co melt during the liquid phase sintering. We observed for the first time that other WC/WC GBs are not partially wetted and, therefore, "dry". They are pseudopartially wetted, namely they have the high contact angle with cobalt binder and, nevertheless, contain the 2-3 nm thin uniform Co-rich layer. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：105 / 108

页数：4

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