Microstructure and mechanical properties of NbC-matrix hardmetals with secondary carbide addition and different metal binders

被引：46

作者：

Huang, S. G. ^{[1
]}

Vanmeensel, K. ^{[1
]}

Mohrbacher, H. ^{[2
]}

Woydt, M. ^{[3
]}

Vleugels, J. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mat Sci MTM, B-3001 Heverlee, Belgium

[2] NiobelCon Bvba, Schilde, Belgium

[3] BAM Fed Inst Mat Res & Testing, Div Tribol & Wear Protect 63, D-12203 Berlin, Germany

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2015年 / 48卷

关键词：

Niobium carbide; Sintering; Grain growth; Microstructure; Mechanical properties; GRAIN-GROWTH INHIBITION; CO CERMETS; CEMENTED CARBIDES; WC; FRACTURE; TI(C;

D O I：

10.1016/j.ijrmhm.2014.10.014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NbC has a relatively high hardness (19.6 GPa) and melting temperature (3600 degrees C) and is usually applied as a grain growth inhibitor in WC-Co hardmetals. The current study reports on the influence of the sintering technology and overall chemical composition on the microstructure and mechanical properties of NbC-based hardmetals, using Co as a binder. The partial replacement of NbC by 5 wt.% WC, MO2C, VC or TiC allows one to significantly improve the hardness and toughness of the NbC-Co materials. The influence of different binders, i.e., Co, 316L stainless steel and Fe3Al on the microstructure and mechanical properties of NbC-based hardmetals was also investigated. The powder mixtures were sintered in the solid state by PECS and liquid state by conventional vacuum sintering. Detailed microstructural analysis was conducted by EPMA elemental mapping and WDS point analysis. Mechanical properties, including Vickers hardness and indentation toughness were assessed. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：418 / 426

页数：9

共 27 条

[1] Formation of core/rim structures in Ti(C,N)-WC-Ni cermets via a dissolution and precipitation process [J].

Ahn, SY ;

Kang, S .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2000, 83 (06) :1489-1494

[2] Microstructure of Ti(CN)-WC-NbC-Ni cermets [J].

Ahn, SY ;

Kim, SW ;

Kang, S .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2001, 84 (04) :843-849

[3]

[Anonymous], INT MET REV

[4]

Barranco J. M., 1989, INT J REFRACTORY JUN, P102

[5] ETA-CARBIDES IN TERNARY-SYSTEM FE-W-C AT 1250DEGREESC [J].

BERGSTROM, M .

MATERIALS SCIENCE AND ENGINEERING, 1977, 27 (03) :257-269

[6]

BOCK A, 1992, POWDER METALL INT, V24, P20

[7] THE WETTING OF SOLIDS BY MOLTEN METALS AND ITS RELATION TO THE PREPARATION OF METAL-MATRIX COMPOSITES [J].

DELANNAY, F ;

FROYEN, L ;

DERUYTTERE, A .

JOURNAL OF MATERIALS SCIENCE, 1987, 22 (01) :1-16

[8] T1(C,N) CERMETS - METALLURGY AND PROPERTIES [J].

ETTMAYER, P ;

KOLASKA, H ;

LENGAUER, W ;

DREYER, K .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 1995, 13 (06) :343-351

[9] SYSTEMS OF NIOBIUM MONOCARBIDE WITH TRANSITION-METALS [J].

GUHA, JP ;

KOLAR, D .

JOURNAL OF THE LESS-COMMON METALS, 1972, 29 (01) :33-&

[10] NbC as grain growth inhibitor and carbide in WC-Co hardmetals [J].

Huang, S. G. ;

Liu, R. L. ;

Li, L. ;

Van der Biest, O. ;

Vleugels, J. .

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2008, 26 (05) :389-395

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