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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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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
Sintering behaviour and microstructure of 3Y-TZP + 8 mol% CuO nano-powder composite
Abstract
Nanocrystalline 3Y-TZP and copper-oxide powders were prepared by co-precipitation of metal chlorides and copper oxalate complexation– precipitation, respectively.Asignificant enhancement in sintering activity of 3Y-TZP nano-powders, without presence of liquid phase,was achieved by addition of 8 mol% CuO nano-powder, resulting in an extremely fast densification between 750 and 900 ◦C. This enhancement in sintering activity was explained by an increase in grain-boundary mobility as caused by dissolution of CuO in the 3Y-TZP matrix. The nano-powder composite was densified to 96% by pressureless sintering at 1130 ◦C for 1 h. Considerable tetragonal to monoclinic phase transformation of the zirconia phase was observed by high temperature XRD analysis. This zirconia phase transformation is discussed in terms of reactions between CuO and yttria as segregated to the 3Y-TZP grain boundaries.