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http://dx.doi.org/10.18419/opus-14936
Autor(en): | Kern, Frank Osswald, Bettina |
Titel: | Mechanical properties of an extremely tough 1.5 mol% yttria-stabilized zirconia material |
Erscheinungsdatum: | 2024 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 1066-1084 |
Erschienen in: | Ceramics 7 (2024), S. 1066-1084 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-149551 http://elib.uni-stuttgart.de/handle/11682/14955 http://dx.doi.org/10.18419/opus-14936 |
ISSN: | 2571-6131 |
Zusammenfassung: | Yttria-stabilized zirconia (Y-TZP) ceramics with a drastically reduced yttria content have been introduced by different manufacturers, aiming at improving the damage tolerance of ceramic components. In this study, an alumina-doped 1.5Y-TZP was axially pressed, pressureless sintered in air at 1250–1400 °C for 2 h and characterized with respect to mechanical properties, microstructure, and phase composition. The material exhibits a combination of a high strength of 1000 MPa and a high toughness of 8.5-10 MPa√m. The measured fracture toughness is, however, extremely dependent on the measurement protocol. Direct crack length measurements overestimate toughness due to trapping effects. The initially purely tetragonal material has a high transformability of >80%, the transformation behavior is predominantly dilational, and the measured R-curve-related toughness increments are in good agreement with the transformation toughness increments derived from XRD data. |
Enthalten in den Sammlungen: | 07 Fakultät Konstruktions-, Produktions- und Fahrzeugtechnik |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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ceramics-07-00070-v2.pdf | 5,21 MB | Adobe PDF | Öffnen/Anzeigen |
Diese Ressource wurde unter folgender Copyright-Bestimmung veröffentlicht: Lizenz von Creative Commons