Mechanical properties and resistance to low temperature degradation of surface nitrided 3Y-TZP
| Autor: | Marc Anglada, A. Mestra, Fernando García Marro, J. Valle |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Fiabilitat i Micromecànica dels Materials, Universitat Politècnica de Catalunya. CIEFMA - Centre d'Integritat Estructural, Micromecànica i Fiabilitat dels Materials |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Biocompatibility Diffusion Metallurgy Mechanical properties Enginyeria dels materials [Àrees temàtiques de la UPC] Hydrothermal circulation Biomedical applications Materials ceràmics -- Propietats mecàniques Fracture toughness visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium ZrO2 Degradation (geology) Ceramic Implant Composite material Nitriding |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2013.06.007 |
| Popis: | 3Y-TZP has been one of the most applied ceramics in the biomedical field, specifically for hip, knee and dental implants, given its high strength, moderate fracture toughness and excellent biocompatibility. However, hydrothermal degradation has meant an important disadvantage, as surface t–m transformation, followed by microcracking, can lead to the premature failure of the implant. In this work, surface nitriding at 1600, 1500 and 1400 °C for 1, 2 and 4 h with N2 gas and ZrN powder was applied and optimised to avoid hydrothermal degradation. Nitriding at 1600 and 1500 °C produces a harder low-toughness surface, not adequate for structural implants. It is shown that the most favourable condition is nitriding at 1400 °C for 1 h, since the mechanical properties of the original 3Y-TZP are not affected with the advantage of retarding hydrothermal degradation by a factor close to 10. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect