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http://hdl.handle.net/2080/189
Title: | WC–ZrO2 composites: processing and unlubricated tribological properties |
Authors: | Venkateswaran, T Sarkar, D Basu, B |
Keywords: | Tungsten carbide Zirconia Sintering Tribochemical wear |
Issue Date: | 2006 |
Publisher: | Elsevier |
Citation: | Wear, Vol 260, Iss 1-2, Page 1-9 |
Abstract: | In 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. |
Description: | Copyright for the article belongs to Elsevier Science Ltd http://dx.doi.org/10.1016/j.wear.2004.11.005 |
URI: | http://hdl.handle.net/2080/189 |
Appears in Collections: | Journal Articles |
Files in This Item:
File | Description | Size | Format | |
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sarkar3.pdf | 1.28 MB | Adobe PDF | View/Open |
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