Enhanced nucleation undercooling and surface self-nanocrystallization of Al2O3-ZrO2(Y2O3) eutectic ceramics
| Autor: | Yong-Hui Ma, Zhi-Gang Wang, Jia-Hu Ouyang, Yujin Wang, Ling-Yun Xie, Zhan-Guo Liu, Abdelkhalek Henniche |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Nucleation 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences visual_art 0103 physical sciences Thermal Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Irradiation Ceramic Composite material 0210 nano-technology Supercooling Nanoscopic scale Eutectic system |
| Zdroj: | Journal of the European Ceramic Society. 39:1707-1711 |
| ISSN: | 0955-2219 |
| Popis: | This present work explores initially the feasibility of producing in-situ surface nanoeutectic Al2O3-ZrO2(Y2O3) (SNAZ) ceramics via the oxyacetylene flame remelting (OAFR) process. Singular cellular nanoeutectics consist of nanoscale lamellae, which prevail in the samples formed under different irradiation times. Ultrafine nanoeutectics are achieved by prolonging the irradiation time, and their formation mechanisms associated with eutectic refinement are proposed to obtain a better understanding on the melt thermal history and microstructural inheritance. The enhanced nucleation undercooling is the essential mechanism associated with the microstructural refinement. SNAZ formed by the OAFR-based rapid solidification seem to offer an inexpensive route to realize in-situ microstructure tailoring or surface shaping. |
| Databáze: | OpenAIRE |
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