| Title | Lifetime estimation of a zirconia-alumina composite for biomedical applications |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2014 |
| Authors | Fabbri, Paride, Piconi C., Burresi Emiliano, Magnani G., Mazzanti Francesca, and Mingazzini C. |
| Journal | Dental Materials |
| Volume | 30 |
| Pagination | 138-142 |
| ISSN | 01095641 |
| Keywords | Activation energy, Alumina, Alumina-zirconia composites, aluminum oxide, Arrhenius plots, chemistry, electron, Hydrothermal stabilities, Kinetics, Lifetime prediction, Low-temperature degradations, Medical applications, Microscopy, Nucleation and growth model, Scanning, Scanning electron microscopy, Tetragonal-to-monoclinic transformation, X ray diffraction, X-Ray Diffraction, Zirconia, Zirconia toughened alumina, Zirconia-alumina composites, zirconium, zirconium oxide |
| Abstract | Objectives In this work long term stability of a zirconia toughened alumina (ZTA) composite was investigated. Methods Accelerated aging tests under hydrothermal environment, in autoclave and hot water, at different temperature, was conducted on material sample. Tetragonal to monoclinic transformation was evaluated by XRD analysis and the monoclinic content was plot as a function of the exposure time. The kinetic of transformation was studied by means Mehl-Avrami-Johnson (MAJ) nucleation and growth model. Results An activation energy for tetragonal to monoclinic transformation of 99 kJ/mol was found by the Arrhenius plot of reaction rate, value in agreement with other bibliography works regarding Y-TZP and alumina-zirconia composites. The in vivo hydrothermal stability simulation, estimated by the obtained activation energy, predicts in 65 years the time necessary to reach 25 vol% of monoclinic phase. Significance These results support the material suitability in biomedical field, especially in dentistry applications as implantology. © 2013 Academy of Dental Materials. |
| Notes | cited By 11 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84892675119&doi=10.1016%2fj.dental.2013.10.006&partnerID=40&md5=b47129f239c4ccef6d1d77014a97c6ad |
| DOI | 10.1016/j.dental.2013.10.006 |
| Citation Key | Fabbri2014138 |
