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利用熔铸－原位反应和压铸成形技术制备了ＴｉＣ／Ａｌ－９Ｓｉ－１．４Ｃｕ－０．５Ｍｇ复合材料，测试了复合材料的拉伸性能．结果表明：ＴｉＣ／Ａｌ－９Ｓｉ－１．４Ｃｕ－０．５Ｍｇ复合材料的室温极限拉伸强度为３５４ＭＰａ，比基体合金提高２６％；２６０℃时复合材料的极限拉伸强度为２７２ＭＰａ，比基体合金提高４６％．复合材料的延伸率与Ａｌ－９Ｓｉ－１．４Ｃｕ－０．５Ｍｇ合金相当．讨论了进一步提高熔铸一原位反应ＴｉＣ／Ａｌ－９Ｓｉ－１．４Ｃｕ－０．５Ｍｇ复合材料拉伸强度的途径．
TiC / Al-9Si-1.4Cu-0.5Mg composites were prepared by casting-in-situ reaction and die-casting forming technology. The tensile properties of the composites were tested. The results show that the ultimate tensile strength at room temperature of TiC / Al-9Si-1.4Cu-0.5Mg composites is 354MPa, which is 26% higher than that of the matrix alloy. The ultimate tensile strength of the composites at 260 ℃ is 272MPa, Increased by 46%. The elongation of the composites is comparable with Al-9Si-1.4Cu-0.5Mg alloy. The ways to further increase the tensile strength of the in-situ TiC / Al-9Si-1.4Cu-0.5Mg composites by melt casting were discussed.