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J. Korean Ceram. Soc. > Volume 47(6); 2010 > Article
Journal of the Korean Ceramic Society 2010;47(6): 509.
doi: https://doi.org/10.4191/kcers.2010.47.6.509
기공형성제 함량이 다공질 Mullite-Bonded SiC 세라믹스의 미세구조와 강도에 미치는 영향
최영훈, 김영욱, 우상국1, 한인섭1
서울시립대학교 신소재공학과
1한국에너지기술연구원 에너지재료연구센터
Effect of Template Content on Microstructure and Flexural Strength of Porous Mullite-Bonded Silicon Carbide Ceramics
Young-Hoon Choi, Young-Wook Kim, Sang-Kuk Woo1, In-Sub Han1
Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul
1Energy Materials Research Center, Korea Institute of Energy Research
Porous mullite-bonded SiC (MBSC) ceramics were fabricated at temperatures ranging from 1400 to $1500^{circ}C$ for 2 h using silicon carbide (SiC), alumina ($Al_2O_3$), strontium oxide (SrO), and poly (methyl methacrylate-coethylene glycol dimethacrylate) (PMMA) microbeads. The effect of template content on porosity, pore morphology, and flexural strength were investigated. The porosity increased with increasing the template content at the same sintering temperature. The flexural strength showed maximum after sintering at $1450^{circ}C$/2 h for all specimens due to small pores and dense strut. By controlling the template content and sintering temperature, it was possible to produce porous MBSC ceramics with porosities ranging from 30% to 54%. A maximum flexural strength of ~51MPa was obtained at 30% porosity when no template were used and specimens sintered at $1450^{circ}C$/2 h.
Key words: Silicon carbide, Mullite, Mullite-bonded silicon carbide, Porosity, Flexural strength
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