Binderless WC and WC-VC materials obtained by pulsed electric current sintering

被引：97

作者：

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

Vanmeensel, K. ^{[1
]}

Van der Biest, O. ^{[1
]}

Vleugels, J. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Heverlee, Belgium

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2008年 / 26卷 / 01期

关键词：

tungsten carbide; vanadium carbide; binderless; grain growth; mechanical properties;

D O I：

10.1016/j.ijrmhm.2007.01.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

WC and WC VC materials without metallic binder addition were densified by pulsed electric current sintering (PECS) in the 1600-1900 degrees C range. The clensification mechanism, microstructure and mechanical properties of the pure WC and VC-doped WC carbides were investigated. The densification of WC-VC materials was accompanied with the formation of a cubic (V,W)C solid solution. Although no abnormal WC grain growth was observed, the (V,W)C grains were observed to grow rapidly with increasing VC content. A maximum Vickers hardness (HV10) of 27.39 GPa in combination with an indentation toughness of 4.38 MPa m(1/2) was obtained for the PECS pure and 1 wt% VC doped WC grades. The hardness was found to linearly decrease down to 21.41 GPa with further addition of VC up to 16 wt%, with a slightly decreased fracture toughness. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：41 / 47

页数：7

共 20 条

[1]

American Society for Testing and Materials (ASTM), 1994, ASTM ANN BOOK STAND

[2] Hard, tough and strong ZrO2-WC composites from nanosized powders [J].

Anné, G ;

Put, S ;

Vanmeensel, K ;

Jiang, DT ;

Vleugels, J ;

Van der Biest, O .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (01) :55-63

[3]

[Anonymous], CEMENTED CARBIDE SIN

[4] A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS [J].

ANSTIS, GR ;

CHANTIKUL, P ;

LAWN, BR ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) :533-538

[5]

*ASTM, 1996, ASTM ANN BOOK STAND

[6] Development of WC-ZrO2 nanocomposites by spark plasma sintering [J].

Basu, B ;

Lee, JH ;

Kim, DY .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2004, 87 (02) :317-319

[7] Microstructures of binderless tungsten carbides sintered by spark plasma sintering process [J].

Cha, SI ;

Hong, SH .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 356 (1-2) :381-389

[8]

EXNER HE, 1988, QUANTITATIVE IMAGE A

[9] Bulk ultrafine binderless WC prepared by spark plasma sintering [J].

Huang, B ;

Chen, LD ;

Bai, SQ .

SCRIPTA MATERIALIA, 2006, 54 (03) :441-445

[10] Experimental investigation and thermodynamic assessment of the V-W-C system [J].

Huang, S ;

Vleugels, J ;

Li, L ;

Van der Biest, O .

JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 395 (1-2) :68-74

← 1 2 →