Insight into t->m transition of MW treated 3Y-PSZ ceramics by grazing incidence X-ray diffraction
| Autor: | Dino Norberto Boccaccini, Cristina Leonelli, Marco Maioli, Vincenzo Riva, Marcello Romagnoli, Maria Cannio, Cecilia Mortalò, Massimiliano Valle |
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| Rok vydání: | 2022 |
| Předmět: |
Diffraction
Materials science Analytical chemistry monoclinic fraction depth Sintering grazing incident X-ray diffraction technique (GIXRD) microwave hybrid heating Casting Tetragonal crystal system Grain growth X-ray crystallography Materials Chemistry Ceramics and Composites 3%mol Yttria partially stabilized zirconia tetragonal zirconia Porosity Monoclinic crystal system |
| Zdroj: | Journal of the European Ceramic Society. 42:227-237 |
| ISSN: | 0955-2219 |
| Popis: | The influence of a microwave hybrid heat treatment (MHH) on the surface and in-depth mineralogical transformation of pre-sintered 3Y-PSZ was investigated. 3Y-PSZ samples were prepared by slip casting and sintered by conventional firing (1270 °C). Then, different MHH treatments from 5 to 15 min. at 1200 °C were applied to obtain a fully stabilized 3Y-TZP. The monoclinic fraction depth profiles in the first micrometres (up to 5) of thickness were investigated by means of the grazing incident X-ray diffraction technique (GIXRD). A good sintering degree with practically nil closed porosity and grain growth was achieved after MHH of 15 min. MHH increases the tetragonal phase content both in the surface and in-depth, reducing completely the monoclinic phase shell typically found after conventional sintering. A new parabolic model is proposed for the convoluted monoclinic fraction depth profile, which through the value of its horizontal asymptote allows the determination of the monoclinic shell thickness. |
| Databáze: | OpenAIRE |
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