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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/189

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contributor.authorVenkateswaran, T-
contributor.authorSarkar, D-
contributor.authorBasu, B-
identifier.citationWear, Vol 260, Iss 1-2, Page 1-9en
descriptionCopyright for the article belongs to Elsevier Science Ltd http://dx.doi.org/10.1016/j.wear.2004.11.005en
description.abstractIn the present work, we report the processing and properties of WC–6 wt.% ZrO2 composites, densified using the pressureless sintering route. The densification of the WC–ZrO2 composites was carried out in the temperature range of 1500–1700 °C with varying time (1–3 h) in vacuum. The experimental results indicate that significantly high hardness of 22–23 GPa and moderate fracture toughness of 5 MPa m1/2 can be obtained with 2 mol% Y-stabilized ZrO2 sinter-additive, sintered at 1600 °C for 3 h. Furthermore, the friction and wear behavior of optimized WC–ZrO2 composite is investigated on a fretting mode I wear tester. The tribological results reveal that a moderate coefficient of friction in the range from 0.15 to 0.5 can be achieved with the optimised composite. An important observation is that a transition in friction and wear with load is noted. The dominant mechanisms of material removal appear to be tribochemical wear and spalling of tribolayer.en
format.extent1315401 bytes-
subjectTungsten carbideen
subjectTribochemical wearen
titleWC–ZrO2 composites: processing and unlubricated tribological propertiesen
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