Low-temperature degradation (LTD) behaviour of CuO-Doped tetragonal zirconia ceramic

Ramesh, S. and Purbolaksono, J. and Hamdi, M. and Sopyan, I. and Tolouei, R. and Amiriyan, M. and Tarlochan, F. and Teng, W.D. (2012) Low-temperature degradation (LTD) behaviour of CuO-Doped tetragonal zirconia ceramic. Ceramics-Silikáty, 56 (1). pp. 15-19. ISSN 0862-5468

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Abstract

In the present work, the low-temperature degradation (LTD) behavior of undoped and copper oxide (CuO) doped yttria-tetragonal zirconia polycrystals ceramics sintered at 1300 degrees C was investigated. The zirconia samples were tested in three different media i.e. superheated steam at 180 degrees C/10 bar refluxing conditions in 20 hydrochloric solution at 110 degrees C and in hot air at 180 degrees C to determine the effect of hydroxyl content in triggering the tetragonal to monoclinic phase transformation. The study found that the additions of CuO significantly reduced the rate of LTD phase transformation in all media tested. The undoped zirconia exhibited severe LTD when exposed to media containing 100 hydroxyl content. Although the CuO-doped samples were generally found to have better LTD characteristics, cross-sections of aged specimens (after 200 hours of exposure in superheated steam) revealed that very thin measurable monoclinic layers were developed. The presence of hydroxyl in the test media was found to have played a significant role in controlling the LTD of zirconia ceramics.

Item Type: Article
Additional Information: You can e-mail to me for the full text of my jurnal at ramesh79@um.edu.my
Uncontrolled Keywords: Y-Tzp Zirconia Low-Temperature Degradation Corrosion Phase Transformation Hydrothermal Degradation Mechanical-Properties Tzp Ceramics Y-Tzp Microstructure Surface Oxide
Subjects: T Technology > TS Manufactures
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 02 Jul 2013 04:25
Last Modified: 02 Jul 2013 04:25
URI: http://eprints.um.edu.my/id/eprint/6296

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