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利用熔铸－原位反应喷射沉积成形技术制备了 ＴｉＣ颗粒增强 ７０７５ Ａｌ基复合材料．测试了复合材料的拉伸性能．结 果表明：在预制块中选取 Ｔｉ：Ｃ＝１：１配比，复合材料中存在较多的条、块状 Ａｌ３Ｔｉ相，致使复合材料的拉伸强度和延伸率均比未 增强合金低；选取Ｔｉ：Ｃ＝１：１．３的配比，有助于消除Ａｌ３Ｔｉ脆性相，提高复合材料的拉伸强度．进一步讨论了提高熔铸－原位反 应喷射沉积成形 ７０７５／ＴｉＣ Ａｌ基复合材料拉伸强度的途径．
TiC particle reinforced 7075 Al matrix composites were prepared by melt casting - in situ reactive spray deposition. Tensile properties of the composites were tested. The results show that: in the pre-block selected Ti: C = 1: 1 ratio, the composite material is more bar, block Al3Ti phase, resulting in the tensile strength and elongation of the composite materials are lower than the non-enhanced alloy; selection Ti: C = 1: 1.3 ratio, helps to eliminate Al3Ti brittle phase, improve the tensile strength of the composite material. The ways to improve the tensile strength of 7075 / TiC Al matrix composites by melt casting-in-situ reactive spray deposition were also discussed.