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J. Korean Ceram. Soc. > Volume 39(2); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(2): 199.
doi: https://doi.org/10.4191/kcers.2002.39.2.199
소결분위기 제어에 의한 Al2O3/Fe-Ni 나노복합재료의 제조 및 특성
이홍재, 정영근, 오승탁1, 이재성1, Tohru Sekino2
요업기술원 나노세라믹센터
1한양대학교 금속재료공학과
2오사카대학교 산업과학연구소
Fabrication of Al2O3/Fe-Ni Nanocomposites by Atmosphere-controlled Sintering and their Properties
Hong-Jae Lee, Young-Keun Jeong, Sung-Tag Oh1, Jai-Sung Lee1, Tohru Sekino2
Korea Institute of Ceramic Engineering and Technology
1Department of Metallurgy and Materials Engineering, Hanyang University
2Institute of Scientific and Industrial Research, Osaka University
To investigate an effect of sintering atmosphere on microstructure and properties of metallic particle dispersed ceramic based composites, the powder mixtures of $Al_2O_3$/Fe-Ni, synthesized by chemical solution process, were hot-pressed under different atmospheres such as hydrogen or argon gas and different sintering temperature. Hot-pressed composite in a hydrogen atmosphere exhibited less reaction phase of $FeAl_2O_4$ and enhanced mechanical properties than that in an argon atmosphere. Furthermore, decreasing hot-pressing temperature produced a refinement of ceramic matrix and metallic dispersion particles as well as improvement of mechanical properties. The change of mechanical properties in the composites with different sintering conditions was explained by microstructural characteristics relating to reaction phase formation.
Key words: $Al_2O_3$-based Fe-Ni Nanocomposites, Hot-pressing, Sintering atmosphere, Microstructure, Mechanical property
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