Low-temperature degradation and defect relationship in yttria-tetragonal zirconia polycrystal ceramic

Sutharsini, U. and Ramesh, S. and Purbolaksono, J. and Tan, C.Y. and Teng, W.D. and Amiriyan, M. (2014) Low-temperature degradation and defect relationship in yttria-tetragonal zirconia polycrystal ceramic. Materials Research Innovations, 18 (S6). pp. 131-134.

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Abstract

In this work, the relationship between tetragonal to monoclinic phase transformation and photoluminescence spectrum were studied for 3 mol% yttria-tetragonal zirconia polycrystal samples sintered in air and argon atmosphere at 1500 degrees C. A low-temperature degradation study was conducted under autoclave conditions containing superheated steam at 180 degrees C and 10 bar vapour pressure for periods up to 12 hours. Photoluminescence studies were conducted using a photoluminescence spectroscope with helium-cadmium laser at a wavelength of 325 nm as the excitation source, and the phase content in the zirconia samples was measured using X-ray diffractometer. The studies concluded that argon gas sintered samples have higher structural vacancy than air sintered samples; the argon gas sintered sample showed a more rapid phase transformation than the air sintered sample and also showed that the defect associated with oxygen vacancies in the zirconia lattice increases with increasing aging time.

Item Type: Article
Uncontrolled Keywords: Aging; Photoluminescence spectrum; Oxygen vacancy; Argon gas sintering; Defects
Subjects: Q Science > Q Science (General)
Depositing User: MR Faizal II H
Date Deposited: 30 Dec 2015 08:51
Last Modified: 30 Dec 2015 08:51
URI: http://eprints.um.edu.my/id/eprint/15460

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