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Transition metals increase hydrothermal stability of yttria-tetragonal zirconia polycrystals (3Y-TZP) |
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| Authors: | Wenliang Zhu Aiko Fujiwara Naomichi Nishiike Elia Marin Nobuhiko Sugano Giuseppe Pezzotti |
| Affiliation: | 1. Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan;2. Institute for the Promotion of University Strategy, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, 606-8585 Kyoto, Japan;3. Department of Dental Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, 602-8566 Kyoto, Japan;4. Department of Medical Engineering for Treatment of Bone and Joint Disorders, Osaka University, 2-2 Yamadaoka, Suita, 565-0854 Osaka, Japan;5. Department of Orthopaedic Surgery, Tokyo Medical University, 6-7-1, Nishi-Shinjuku, Shinjuku-ku, 160-0023 Tokyo, Japan;6. The Center for Advanced Medical Engineering and Informatics, Osaka University, Yamadaoka, Suita, 565-0871 Osaka, Japan |
| Abstract: | In this paper, the influence of transition metals on phase stability of zirconia in 3?mol% Y2O3 doped tetragonal zirconia polycrystals (3Y-TZP) in hydrothermal environments was reported. 3Y-TZP with and without stainless-steel or CoCr metal stains on the sample surface were subjected to different isothermal treatments in water vapor, and their respective monoclinic fractions were quantified by confocal Raman spectroscopy. The outputs of these spectroscopic experiments revealed transition metals conspicuously could stabilize the tetragonal zirconia polymorph in the monolithic zirconia, possibly due to the occurrence of off-stoichiometric chemistry in the presence of metal stains. |
| Keywords: | 3Y-TZP Low temperature aging Polymorphic transformation Transition metals Oxygen vacancy |
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