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Materials 2010, 3(2), 800-814; doi:10.3390/ma3020800

Stability of Nanocrystalline Spark Plasma Sintered 3Y-TZP

1,* , 1
1 Center for Structural Integrity and Reliability of Materials, Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain 2 School of Engineering and Materials Science, Queen Mary College, University of London, Mile End Road, London E1 4NS, UK 3 Nanoforce Technology Ltd, Mile End Rd, London E1 4NS, UK
* Authors to whom correspondence should be addressed.
Received: 2 December 2009 / Revised: 21 January 2010 / Accepted: 25 January 2010 / Published: 28 January 2010
(This article belongs to the Special Issue Ceramics for Healthcare)
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Spark plasma sintered 3Y-TZP has been investigated with respect to hydrothermal ageing and grinding. The sintering was performed between the temperatures of 1,100 and 1,600 °C for a soaking time of 5 minutes and the resulting materials were obtained with grain sizes between 65 to 800 nm and relative densities between 88.5 to 98.8%. Experiments on hydrothermal ageing in water vapour at 131 °C, 2 bars during 60 hours shows that phase stability is retained, elastic modulus and hardness of near surface region measured by nanoindentation does not change in fine grain (<200 nm) materials, in spite of porosity. In ground specimens, very small amount of transformation was found for all grain sizes studied.
Keywords: 3Y-TZP; grain size; degradation; phase transformation 3Y-TZP; grain size; degradation; phase transformation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Chintapalli, R.; Mestra, A.; García Marro, F.; Yan, H.; Reece, M.; Anglada, M. Stability of Nanocrystalline Spark Plasma Sintered 3Y-TZP. Materials 2010, 3, 800-814.

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