Theoretical description of zirconia ceramics aging kinetics
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An analytical approach for fraction calculation of monoclinic phase on zirconia surface under aging conditions was developed. The approach is based on a model of nucleation and growth of areas which underwent tetragonal to monoclinic transformation. Nucleation in this model takes place only at the material surface with nucleation rate proportional to the area of non-transformed zone. The nuclei are conical in shape; their initial dimensions and growth rate are constant. The resulting equations describe factual and observed monoclinic phase content on the surface of zirconia ceramics. The equations correlate well with experimental data on tetragonal zirconia ceramics aging kinetics.
KeywordsZirconia TZP Aging Modeling
This work was supported by the Ministry of Education and Science of the Russian Federation (project no. 16.2100.2017/ПЧ, literature access) and by the Russian Science Foundation (project no. 16-19-10405, modeling expenses).
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