발간논문

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Vol.38, No.10, 1360 ~ 1367, 2000
Title
Material Properties of the Short Fiber Reinforced Al Alloy Composite 2 : Effect of the Interfacial Reaction
석현광Hyun Kwang Seok,하용식Yong Sik Ha,이호인Ho In Lee,이재철Jae Chul Lee
Abstract
Effect of interfacial reaction on the mechanical properties of the AC8A Al alloy reinforced with ASZ short fibers(ASZ/AC8A composite) was studied. In the ASZ/AC8A composite, the interfacial reaction was observed to proceed between the SiO₂ binder layer and Mg of the matrix to form MgAl₂O₄ at the interface. Formation of MgAl₂O₄ was believed to enhance the interfacial bonding strength resulting in the improved composite strength. However, the interfacial reaction in the ASZ/AC8A composite always took place at the expense of Mg in the matrix, resulting in composite devoid of the precipitates containing Mg such as Al₂CuMg and Mg₂Si. Interfacial reaction mechanisms were investigated for composites containing various amount of Mg contents. The resultant mechanical properties of the composite were measured to determine the adequate amount of Mg contents within the composites. Microstructural changes of the composite were observed using TEM and DSC to provide qualitative analyses on the experimental observations.
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