Low-temperature ageing of zirconia-toughened alumina ceramics and its implication in biomedical implants
| Autor: | Deville, Sylvain, Chevalier, Jérôme, Fantozzi, Gilbert, Bartolomé, José, Requena, Joaquin, Moya, José, Torrecillas, Ramon, Diaz, Luis Antonio |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Journal of the European Ceramic Society, Volume 23, Issue 15, 2003, Pages 2975-2982 Journal of the European Ceramic Society, Volume 23, Issue 15, 2003, Pages 2975-2982 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/S0955-2219(03)00313-3 |
| Popis: | Changes in crystalline phases resulting from low-temperature ageing of different yttria doped and non-doped zirconia-toughened alumina composites and nanocomposites were investigated under controlled humidity and temperature conditions in autoclave. A classical powder mixing processing route and a new modified colloidal processing route were used to process the composites. Different compositions ranging from 2.5 wt.% zirconia in a matrix of alumina to pure zirconia (3Y-TZP) were studied. It was observed that Al2O3+yttria stabilised ZrO2 composites exhibited significant ageing. However, ageing was much slower than traditionally observed for Y-TZP ceramics, due to the presence of the alumina matrix. Ageing was clearly limited for zirconia content beyond 25 wt.%. On the other side of the spectrum, Al2O3+2.5 wt.% ZrO2 initially presented a monoclinic fraction but did not show any ageing degradation. These composites seem to represent the best choice between slow crack growth and ageing resistance. Comment: 15 pages, 7 figures |
| Databáze: | arXiv |
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