SiCp/Al Composites Fabricated by Modified Squeeze Casting Technique |
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Authors: | Shoujiang QU Lin GENG Jiecai HAN |
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Affiliation: | Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China... |
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Abstract: | A cost effective method was introduced to fabricate pure aluminum matrix composites reinforced with 20% volume fraction of 3.5 μm SiC particles by squeeze casting followed by hot extrusion. In order to lower volume fraction of the composites, a mixed preform containing pure aluminum powder and the SiC particles was used. The suitable processing parameters for the infiltration of pure aluminum melt into the mixed preform are: melt temperature 800℃, infiltration pressure 5 MPa, and solidification pressure 50 MPa. Microstructure and properties of the composites in both as-cast and hot extruded states were investigated. The results indicate that hot extrusion can obviously improve the mechanical properties of the composite. |
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Keywords: | Aluminum Particulate reinforced composites Casting Liquid infiltration |
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