Effect of low content sintering aids addition on β-SiC sintered by spark plasma sintering |
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| Affiliation: | 1. French-German Research Institute of Saint-Louis, Saint-Louis, France;2. ICSM, CEA, CNRS, ENSCM, Univ Montpellier, Marcoule, France;3. IEM, CNRS, ENSCM, Univ Montpellier, Montpellier, France;1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, Anhui, China;2. National Key Laboratory of Science and Technology on Vacuum Technology & Physics, Lanzhou Institute of Physics, Lanzhou 730000, China;3. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, PR China;2. Institute of Intelligent Manufacturing Technology, Shenzhen Polytechnic, Shenzhen 518055, PR China;3. Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, PR China;4. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, PR China;5. School of Materials, Sun Yat-sen University, Guangzhou 510275, PR China;1. Department of Aerospace Engineering, Indian Institute of Science, Bangalore, India;2. Department of Aerospace Engineering, Auburn University, Auburn, AL, USA;3. Material Science Division, National Aerospace Laboratories, Bangalore, India;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China;2. State Key Laboratory of High Performance Ceramics and Super?ne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, PR China;1. Advanced Interdisciplinary Technology Research Center, National Innovation Institute of Defense Technology, Beijing 100010, China;2. Science and Technology on Advanced Ceramic fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China;3. School of Materials, Sun Yat-Sen University, Guangzhou 510275, China |
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| Abstract: | The influence of low content of sintering aids addition on the properties of β-SiC sintered by spark plasma sintering was studied based on X-ray diffraction and SEM observations. Three dopants, respectively Al2O3, Al2O3-Y2O3 and Al2O3-AlN were chosen, and the investigation was undertaken in the 0.5–5 wt%] content range. The analyses revealed the possibility to increase the density of sintered pellets close to 100% of theoretical density (T.D.), even with the addition of very low sintering aids contents, as low as 0.5 wt%, for each dopant. The combination with high sintering pressure allowed keeping a fine microstructure and a pristine cubic crystalline structure while avoiding the formation of secondary phases. |
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| Keywords: | Silicon carbide Spark plasma sintering Sintering aids |
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