발간논문

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Vol.33, No.8, 1101 ~ 1110, 1995
Title
Pressureless Infiltration Behavior and Microstructures of SiCp / Al Matrix Composite
이건배K . B . Lee, 권훈H . Kwon
Abstract
Infiltration behavior of the molten metal and microstructure of the SiC particulate reinforced Al alloy composites which were fabricated by pressureless infiltration technique have been studied. Under the nitrogen atmosphere spontaneous infiltration of the molten Al alloy into the SiC powder bed occurred at lower temperatures as the Mg content of the matrix alloy increased. However, no spontaneous infiltration occurred in the conditions of Mg-containing Al alloy under the argon atmosphere and of pure Al containing no Mg under the nitrogen atmosphere. Thus the presence of both Mg and nitrogen atmosphere must be needed to produce the spontaneous infiltration under the pressureless condition. The primary Si nucleated and grew coarsely on the SiC surface with decreasing cooling rate. It is observed that the reaction products, such as MgAl₂O₄ and Al₄C₃ formed as a result of the interfacial reaction between Al matrix and SiC.
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