Influence of silicon carbide as a mineralizer on mechanical and thermal properties of silica-based ceramic cores |
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| Affiliation: | 1. Advanced Materials and Devices Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea;2. Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;1. School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Kyungnam, Republic of Korea;2. Engineering Ceramic Center, Korea Institute of Ceramic EEG. & TECH., Digital-ro 10-Gil, Guemcheon-gu, Seoul 153-801, Republic of Korea;1. Institute of Physics-CND, Silesian University of Technology, Konarskiego 22B, Gliwice 44-100, Poland;2. Institute of Non Ferrous Metals, Sowińskiego 5, Gliwice 44-100, Poland;1. Institute of Power Engineering Ceramic Department CEREL, Research Institute, 1 Techniczna St., 36-040 Boguchwa?a, Poland;2. Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wo?oska St., 02-507 Warsaw, Poland;3. WSK “PZL – Rzeszów” S.A., 120 Hetmańska St., 35-078 Rzeszów, Poland;1. Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea;2. School of Materials Science and Engineeing, Changwon National University, 20 Changwondaehak-ro, Changwon, Gyeongnam 51140, Republic of Korea |
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| Abstract: | Ceramic cores have been designed with compounds based on fused silica due to its excellent thermal stability and chemical inertness against molten metals. To endure the high temperatures present during investment casting, mineralizers have been widely used to enhance the flexural strength and shrinkage of ceramic cores. In this study, we demonstrated a silica-based ceramic core with silicon carbide as a mineralizer for improving the mechanical and thermal properties. The SiC in the silica-based ceramic cores can enhance the mechanical properties (i.e., flexural strength and linear shrinkage) by playing a role as a seed for the crystallization of fused silica to cristobalite. The SiC also improves the thermal conductivity due to its higher value compared with fused silica. The results suggest that using the optimal amount of silicon carbide in silica-based ceramic cores can provide excellent mechanical properties of flexural strength and linear shrinkage and improved thermal conductivity. |
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| Keywords: | Ceramic core Fused silica Silicon carbide Flexural strength Linear shrinkage Thermal conductivity |
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