Title
3Y-TZP ceramics with improved hydrothermal degradation resistance and fracture toughness 3Y-TZP ceramics with improved hydrothermal degradation resistance and fracture toughness
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Barking ,
Subject
Physics
Chemistry
Source (journal)
Journal of the European Ceramic Society. - Barking
Volume/pages
34(2014) :10 , p. 2453-2463
ISSN
0955-2219
ISI
000336352500033
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Different factors such as the way of incorporating the Y2O3 stabilizer, alumina addition and sintering temperature were assessed with the goal to improve the low temperature degradation (LTD) resistance of 3Y-TZP without compromising on the mechanical properties. The degradation of hydrothermally treated specimens was studied by X-ray diffraction, micro-Raman spectroscopy and scanning electron microscopy. Decreasing the sintering temperature decreased the LTD susceptibility of 3Y-TZPs but did not allow to obtain a LTD resistant 3Y-TZP with optimized mechanical properties. Alumina addition along with the use of Y2O3 stabilizer coated starting powder allowed to combine both an excellent toughness and LTD resistance, as compared to alumina-free and stabilizer co-precipitated powder based equivalents. Transmission electron microscopy revealed that the improved LTD resistance could be attributed to the segregation of Al3+ at the grain boundary and the heterogeneously distributed Y3+ stabilizer.
E-info
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