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材料研究学报 2004
Fabrication and room--temperature compressive behavior of TiCp/Mg matrix composites by $in$ $situ$ reactive infiltration technique
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Abstract:
The in situ exothermic reaction between Ti and C elements combined with infiltration of molten magnesium into TiCp was adopted to fabricate TiCp/Mg and TiCp/AZ91D magnesium ma- trix composites.The phase composition of the in situ formed reinforcement TiC and their morphologies were analyzed,and the room-temperature compressive behaviors were also studied for these two mag- nesium matrix composites.The results showed that dense composite microstructures were obtained by the present reactive infiltration process.The in situ TiCp reinforcement particulates uniformly formed within the Mg matrix and took in forms of fine particles,flakes and interpenetrating networks.The compressive strengths for the as-fabricated TiCp/Mg and TiCp/AZ91D composites reach about 598 and 650 MPa,respectively,at room temperature and a strain rate of 0.01s~(-1).