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SiC/2014Al 복합재료의 계면현상 : (1) 계면특성 개질 (I) Modification of Interfacial Characteristics
이재철,이호인,안재평,시충양 대한금속재료학회(대한금속학회) 1999 대한금속·재료학회지 Vol.37 No.11
Methodologies both to avoid the formation of Al₄C₃ and to tailor the interfacial structures in the SiC/2014Al composite were demonstrated. Modification of the interfacial structures in the SiC/2014Al composite were made by forming SiO₂ layers on the surfaces of SiC via the passive oxidation at elevated temperatures. In the 2014Al composite reinforced oxidized SiC, nano-sized MgAl₂O₄ and Si crystals were observed to form at the interfacial region as a result of the reaction between the SiO₂ layer and the matrix. On the other hand, in the case of the 2014Al composite reinforced unoxidized SiC, SiC were found to react with Al to form both Al₄C₃ and Si. Crystallographic structures of the observed interfacial products were characterized using EDS and CBED of TEM.