Journal
ACTA BIOMATERIALIA
Volume 10, Issue 2, Pages 951-959Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.actbio.2013.09.033
Keywords
Zirconia; Phase transformation; Low-temperature degradation; Aging kinetics; X-Ray diffraction
Funding
- German Research Association DFG [Ni-299/23-1]
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We present new findings on the low-temperature degradation of yttria-stabilized zirconia at 37 degrees C over several years and at high and low partial pressures of water. With the aid of focused ion beam cross-section confirmation studies we are able to show an extensive linear, continuous degradation without retardation, even at low temperatures and low water pressures. The characteristic layer growth and its inferred rate constant imply a lifetime of tens of years under simple tension and open the possibility of studying the longevity of these ceramics more rigorously. In addition, we show reproducibility complications of accelerated aging tests by the use of different autoclaves and possible implications for standardized procedures. (C) 2013 Acts Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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