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Ran, S.
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Publications (5/5 displayed)
- 2009Dry-sliding self-lubricating ceramics: CuO doped 3Y-TZPcitations
- 2007Effect of Microstructure on the Tribological and Mechanical Properties of CuO-Doped 3Y-TZP Ceramicscitations
- 2007Sintering behaviour and microstructure of 3Y-TZP + 8 mol% CuO nano-powder compositecitations
- 2006Sintering Behavior of 0.8 mol%-CuO-Doped 3Y-TZP Ceramicscitations
- 2006Synthesis, sintering and microstructure of 3Y-TZP/CuO nano-powder compositescitations
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article
Effect of Microstructure on the Tribological and Mechanical Properties of CuO-Doped 3Y-TZP Ceramics
Abstract
Dense 8 mol% CuO-doped 3Y-TZP ceramics were prepared by pressureless sintering for 8 h at 1500° and 1550°C, respectively. Transmission electron spectroscopy revealed that the ceramic sintered at 1500°C exhibits grain boundaries free of any amorphous phase, while crystalline copper-oxide grains were found in the zirconia matrix, whereas the sample sintered at 1550°C contains a Cu-rich amorphous grain boundary layer. The tribological behavior of these materials was tested under dry-sliding conditions using a pin-on-disk tribometer. The material sintered at 1500°C showed self-lubrication resulting in a low coefficient of friction (f) of 0.2–0.3 and a low specific wear rate (k) 10−6 mm3·(N·m)−1. In contrast, the material sintered at 1550°C showed poor tribological behavior (f=0.8–0.9; k 10−6 mm3·(N·m)−1 under the same conditions. The difference in the tribological behavior of these two materials was interpreted on the basis of mechanical properties and microstructural characteristics.