Effect of 10 wt% VC on the Friction and Sliding Wear of Spark Plasma-Sintered WC-12 wt% Co Cemented Carbides

Journal article

Authors / Editors

Ogunmuyiwa, Enoch

Research Areas

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Publication Details

Author list: Ogunmuyiwa EN, Sacks N, Bergstrom L, Akhtar F

Publisher: Taylor and Francis Group

Place: PHILADELPHIA

Publication year: 2017

Journal: Tribology Transactions (1040-2004)

Journal acronym: TRIBOL T

Volume number: 60

Issue number: 2

Start page: 276

End page: 283

Number of pages: 8

ISSN: 1040-2004

eISSN: 1547-397X

Languages: English-Great Britain (EN-GB)

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Abstract

The effect of 10 wt% VC addition on the friction and sliding wear response of WC-12 wt% Co cemented carbides produced by spark plasma sintering (SPS) was studied. The SPS of WC-12 wt% Co alloys with and without 10 wt% VC, at 1100 and 1130 degrees C, respectively, yielded dense materials with minimal porosity. No eta phase was found in any of the alloys. The WC-12 wt% Co-10 wt% VC alloy showed the formation of a hard WV4C5 phase, which improved the alloy's hardness. Friction and dry sliding wear tests were done using a ball-on-disk configuration under an applied load of 10 N and sliding speed of 0.26 m.s(-1), and a 100Cr-steel ball was used as the counterface. A significant improvement in the sliding wear response of the harder and more fracture tough WC-12 wt% Co-10 wt% VC alloy compared to the WC-12 wt% Co alloy was found. Analysis of the worn surfaces by scanning electron microscopy showed that the wear mechanisms included plastic deformation, preferential binder removal, adhesion, and carbide grain cracking and fragmentation.

Keywords

Friction, Tungsten, wear mechanisms

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