Dilatometric study of anisotropic sintering of alumina/zirconia laminates with controlled fracture behaviour |
| |
| Affiliation: | 1. CEITEC BUT, Brno University of Technology, Purkynova 123, 61669 Brno, Czech Republic;2. Institute of Materials Science and Engineering, Brno University of Technology, Technicka 2896/2, 61669 Brno, Czech Republic;3. CEITEC IPM, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 513/22, 61662 Brno, Czech Republic;1. Yokohama National University, Japan;2. Kanagawa Academy of Science and Technology, Japan;1. Central European Institute of Technology, Brno University of Technology, Czech Republic;2. Central European Institute of Technology—Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Czech Republic;1. CEITEC – Central European Institute of Technology, Brno University of Technology, Purkynova 123, 612 00 Brno, Czechia;2. CEITEC IPM, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 513/22, 616 62 Brno, Czechia;1. Department of Physics, Presidency College, Chennai 600005, India;2. Department of Physics, Panimalar Engineering College, Chennai 600123, India;3. Materials Characterization Division, National Physical Laboratory, New Delhi 110012, India;4. Crystal Growth Centre, Anna University, Chennai 600025, India |
| |
| Abstract: | Al2O3 and ZrO2 monoliths as well as layered Al2O3/ZrO2 composites with a varying layer thickness ratio were prepared by electrophoretic deposition. The sintering shrinkage of these materials in the transversal (perpendicular to the layers, i.e. in the direction of deposition) as well as in the longitudinal (parallel with layers interfaces) direction were monitored using high-temperature dilatometry. The sintering of layered composites exhibited anisotropic behaviour. The detailed study revealed that sintering shrinkage in the longitudinal direction was governed by alumina (material with a higher sintering temperature), whilst in the transversal direction it was accelerated by the directional sintering of zirconia layers. For interpretation of such anisotropic sintering kinetics, the Master Shrinkage Curve model was developed and applied. Crack propagation through laminates with a different alumina/zirconia thickness ratio was described with the help of scanning electron microscopy and confocal laser microscopy. |
| |
| Keywords: | Alumina/zirconia laminate Sintering shrinkage Master sintering curve Crack deflection |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
