- Effect of Grain Size and Heat-treating Atmosphere on the Phase Stability of Y-TZP
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Tai-Joo Chung, Seung-Su Ahn, Eun-Wha Song, Kyung-Sik Oh, Jong-Sook Lee, Young-Sik Kim
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J Korean Powder Metall Inst. 2006;13(5):360-365.
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DOI: https://doi.org/10.4150/KPMI.2006.13.5.360
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- The phase stability of tetragonal phase in Y-TZP was investigated in terms of the distribution of grain sizes and heat-treating atmosphere. Y-TZP with various grain sizes were prepared using duration time at 1600°C as experimental parameter. Accumulated grain size distributions were built from the SEM micrographs and the amount of tetragonal phase were measured using XRD. Both results were compared to determine the critical grain size before and after heat-treatment in vacuum. The critical grain size drastically decreased compared with the small increase of average grain size due to the autocatalytic effect which critically affects the tetragonal to monoclinic phase transformation. After heat-treatment in reductive atmosphere critical grain size relatively increased due to the stabilization of tetragonal phase. The formation of oxygen vacancies during heat-treatment was ascribed to the increase of stability.
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Citations
Citations to this article as recorded by  - Direct Observation on the Low Temperature Degradation Due to Surface Treatment in Y-TZP
Tai-Joo Chung, Hye-Sung Kim
Journal of Korean Powder Metallurgy Institute.2010; 17(3): 197. CrossRef
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