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

Stability of Nanocrystalline Spark Plasma Sintered 3Y-TZP

1,* , 1
,
1
,
2,3
,
2,3
 and
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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Abstract

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 (CC BY 3.0).

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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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