Effects of sintering curves on microstructure,physical and mechanical properties and on low temperature degradation of zirconia-toughened alumina |
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| Affiliation: | 1. National Research Tomsk Polytechnic University, Tomsk, Lenin Avenue, 30, 634050, Russia;2. Siberian State Medical University, Tomsk, Moscovskiy tract, 2, 634050, Russia;3. Boreskov Institute of Catalysis, Novosibirsk, Lavrentiev Avenue, 5, 630090, Russia;1. Department of Conservation Science, the Palace Museum, Beijing, 100009, People’s Republic of China;2. Zhejiang Provincial Institute of Cultural Relics and Archaeology, Hangzhou, Zhejiang, 310013, People’s Republic of China;3. Object Department, the Palace Museum, Beijing, 100009, People’s Republic of China;1. Institute of Solid State Physics, University of Latvia, Latvia;2. Center For Quantum Devices, Niels Bohr Institute, University of Copenhagen, Denmark;1. Department of Mechanical Science, Division of Science and Technology, Graduate School of Sciences and Technology for Innovation, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;2. Graduate School of Advanced Technology and Sciences, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;3. Department of Mechanical Science, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijyousanjima, Tokushima 770-8506, Japan;1. School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam, 51140, Republic of Korea;2. Department of Energy Engineering, Hanyang University, Seoul, 04763, Republic of Korea;3. Department of Materials Convergence and System Engineering, Changwon National University, Changwon, Gyeongnam, 51140, Republic of Korea;4. School of Materials and Metallurgy Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, 114051, China;5. Steelmaking Research Group, Technical Research Laboratories, POSCO 1, Goedong-dong, Nam-gu, Pohang-shi, Gyeongbuk, Republic of Korea;1. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;2. Chiba Institute of Technology, 2-17-1 Tsudanuma,Narashino, Chiba 275-0016, Japan;1. KU Leuven (University of Leuven), Department of Materials Engineering, Kasteelpark Arenberg 44, B-3001, Leuven, Belgium;2. KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT -Biomaterials Research Group & UZ Leuven (University Hospitals Leuven), Dentistry, Kapucijnenvoer 7 Block A, B-3000, Leuven, Belgium |
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| Abstract: | The objective of this work was to study two-step sintering as a means of controlling the microstructure of coarse Al2O3 matrix composites containing submicrometric and nanometric inclusions of ZrO2 ranging from 0–30 wt. % by weight based on commercially available powders and evaluate its hydrothermal degradation as function of a water vapour pressure and its mechanical properties. The results showed that two-step sintering allowed a more efficient microstructural control than single-step sintering, resulting in good mechanical properties. The highest flexural strength was achieved for ZTA samples sintered in two-stage sintering conditions TSS2 with T1 = 1560 °C for 3 h, T2 = 1460 °C for 8 h. The studied composites showed good resistance to hydrothermal degradation compared to composites sintered in single step sintering conditions. |
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| Keywords: | Zirconia toughened alumina Two step sintering Low temperature degradation Phase composition |
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