Investigation on the habit plane of martensitic transformation in zirconia coatings
| Autor: | Marcel Winhold, Mingguang Kong, Christian H. Schwalb, Yongzhe Wang, Matiullah Khan, P. Frank, Yi Zeng |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Crystallography Tetragonal crystal system Coating Residual stress Metastability Diffusionless transformation 0103 physical sciences engineering Cubic zirconia 0210 nano-technology Monoclinic crystal system Electron backscatter diffraction |
| Zdroj: | Journal of the Australian Ceramic Society. 56:257-264 |
| ISSN: | 2510-1579 2510-1560 |
| Popis: | Martensitic transformation was investigated by the combination of electron backscatter diffraction and in situ atomic force microscope (AFM). The metastable tetragonal phase in the plasma-sprayed 3 mol% Y2O3-ZrO2 coating showed a strong basal texture with the {001}t plane parallel to the surface. The habit plane (108)t of a pair of V-arranged monoclinic variants was determined on the basis of the lattice correspondence of (001)m//(100)t, [100]m//[010]t, and [010]m//[001]t and an included angle of 14°. Additionally, the direction of residual stress in the coatings was revealed by the periodic corrugation patterns of AFM, which matched approximately with 10° deflection of the basal texture. This was further confirmed by an in situ reverse transformation from the monoclinic phase to tetragonal phase and the formation of parallel microcracks after stress release during heat treatment. |
| Databáze: | OpenAIRE |
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