Title: Critical influence of alumina content on the low temperature degradation of 2-3 mol% yttria-stabilized TZP for dental restorations
Authors: Zhang, Fei ×
Vanmeensel, Kim
Inokoshi, Masanao
Batuk, M
Hadermann, J
Van Meerbeek, Bart
Naert, Ignace
Vleugels, Jef #
Issue Date: 2015
Publisher: Elsevier Science Publishers
Series Title: Journal of the European Ceramic Society vol:35 issue:2 pages:741-750
Abstract: The influence of 0.25, 2 and 5 wt.% alumina addition on the mechanical properties and low temperature degradation (LTD) of 3, 2.5 and 2 mol% yttria-stabilized TZP ceramics was investigated. The amount of alumina addition was observed to have a crucial impact on the degradation of Y-TZP ceramics.
Independent on the yttria stabilizer content, 0.25 wt.% alumina had a higher degradation retarding effect to Y-TZP ceramics than 2 and 5 wt.% of alumina addition, which had a comparable effect. The apparent activation energy for the degradation process was increased by adding alumina, but it was the same for 0.25–5 wt.% alumina doped 3Y-TZP ceramics. For Y-TZPs containing a small amount of alumina addition, only the segregated Al3+ at the grain boundaries of the zirconia grains was effective to retard the degradation of Y-TZPs. The secondary phase Al2O3 grains increased the degradation kinetics, which might be attributed to the residual stresses.
ISSN: 0955-2219
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Biomaterials - BIOMAT
Surface and Interface Engineered Materials
Sustainable Metals Processing and Recycling
× corresponding author
# (joint) last author

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