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J. Korean Ceram. Soc. > Volume 38(9); 2001 > Article
Journal of the Korean Ceramic Society 2001;38(9): 799.
용융침투법으로 제조한 유리-알루미나 복합체: Ⅰ. 알루미나 입도 효과
이득용, 장주웅1, 김대준2, 박일석3, 이준강2, 이명현4, 김배연5
대림대학 재료정보공학과
1(주)우리동명 치과재료연구소
2KIST 복합기능세라믹센터
3KIST 복합기능세라믹센터,연세대학교 세라믹공학과
4KICET 차세대사업단
5인천대학교 재료공학과
Glass-alumina Composites Prepared by Melt-infiltration: Ⅰ. Effect of Alumina Particle Size
Deuk-Yong Lee, Ju-Woong Jang1, Dae-Joon Kim2, Il-Seok Park3, Jun-Kwang Lee2, Myung-Hyun Lee4, Bae-Yeon Kim5
Department of Materials Engineering, Daelim College of Technology
1Dental Material Research Center, We DongMyung Co., Ltd.
2Multifunctional Ceramics Research Center, Korea Institute of Science and Technology
3Multifunctional Ceramics Research Center, Korea Institute of Science and Technology, Department of Ceramic Engineering, Yonsei University
4Next Generation Enterprise Group, Korea Institute of Ceramic Engineering and Technology
5Department of Materials Engineering, Univerisity of Incheon
Two commercial alumina powders having different particle size of $0.5{mu}m$ and 3${mu}$m were presintered at 1120$^{circ}$C for 2h and then lanthanum aluminosilicate glass was infiltrated at 1100$^{circ}$C for up to 4h to obtain the densified glass-alumina composites. The effect of alumina particle size on packing factor, microstructure, wetting, porosity and pore size, and mechanical properties of the composite was investigated. The optimum mechanical properties and compaction behavior were observed for the 3${mu}$m alumina particle dispersed composite. The 3${mu}$m alumina particle size and distribution for he preform were within 0.1 to 48${mu}$m and bimodal and random orientation. The strength and the fracture toughness of the composite having 3${mu}$m alumina particles were 519MPa and $4.5MPa{cdot}m^{1/2}$, respectively.
Key words: Alumina, Lanthanum-aluminosilicate glass, Melt-infiltration, Die-pressing, Mean particle spacing
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