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采用真空热压法制备了体积分数为30%的Si Cp/2024Al复合材料,研究了该复合材料的显微组织结构及力学性能。结果表明,复合材料组织致密,颗粒与基体界面结合状况较好,Si C颗粒在铝基体中基本上分布均匀。经490℃、2 h固溶处理和170℃、8 h人工时效后,Si Cp/2024Al复合材料的抗拉强度、屈服强度和伸长率分别为409 MPa、325 MPa和4.9%,基体中存在大量的纳米析出相为S’(Al2Cu Mg)。随Si C颗粒加入,复合材料力学性能提高,其断裂方式为基体开裂和界面处撕裂。
The volume fraction of 30% Si Cp / 2024Al composite was prepared by vacuum hot pressing. The microstructure and mechanical properties of the composite were investigated. The results show that the composites are dense and the interface between the particles and the matrix is well bonded. The Si C particles are distributed uniformly in the aluminum matrix. The tensile strength, yield strength and elongation of Si Cp / 2024Al composites were 409 MPa, 325 MPa and 4.9% after 2 h solution treatment at 490 ℃ for 2 h and artificial aging at 170 ℃ for 8 h. Of the nano-precipitated phase is S ’(Al2Cu Mg). With the addition of Si C particles, the mechanical properties of the composites increase, and the fracture modes are cracking of the matrix and tearing at the interface.