分别以ZL102、ZL114A、ZL205A及ZL301这4种合金为基体，以SiC纤维为增强体，采用真空气压浸渗法制备SiCf体积分数为40%的连续SiCf/Al复合材料。采用TEM和SEM对不同基体合金的SiCf/Al复合材料界面及断口形貌进行观察，并测试其拉伸强度。结果表明：不同基体合金的连续 SiCf/Al 复合材料界面形貌存在明显差异，其力学性能及断口形貌亦存在较大的差异。其中，SiCf/ZL102复合材料的界面存在细小的针状 Al4C3相，无明显界面层，呈弱界面结合，平均拉伸强度为615.7 MPa，断口纤维拔出现象明显；SiCf/ZL205A复合材料的界面存在块状的Al4C3相及CuAl2相，呈强界面结合，平均拉伸强度为385.1 MPa，断口平齐；SiCf/ZL114A复合材料的界面结合较SiCf/ZL102复合材料的强，平均拉伸强度为475.9 MPa；SiCf/ZL301复合材料的界面存在棒状Al4C3相，大量Mg元素的富集降低界面反应，界面结合强度适中，平均拉伸强度为769.3 MPa，断口出现韧窝，基体改变裂纹横向传播的方向。
By using four different matrix alloys, such as ZL102, ZL114A, ZL205A and ZL301, as substrate, SiCf/Al composite with volume fraction of 40% SiCf were prepared by vacuum pressure impregnation. The interface characteristics and fracture morphology of SiCf/Al composite were observed by TEM and SEM, and the tensile strength was tested. The results show that, the interfaces of continuous SiCf/Al composite of different matrix alloys exist significant differences in their interface morphology, mechanical properties and fracture morphology. Among them, the SiCf/ZL102 composite with tiny needle Al4C3 at the interface and without obvious interface layer, the interfacial bonding is weak, with average tensile strength of 615.7 MPa and obvious fracture fiber pull phenomenon. A large bulk of CuAl2 and Al4C3 phase exist at the interface of the SiCf/ZL205A composite, the interfacial bonding is strong, with average tensile strength of 385.1 MPa, and flush fracture. The interface of SiCf/ZL114A composite is slightly stronger than that of SiCf/ZL102 composite material, the average tensile strength is 475.9 MPa. The rod-like Al4C3 phase exists at the interface to SiCf/ZL301 composite, a large number of Mg element enrichment reduces the interfacial reaction, the average tensile strength is 769.3 MPa, the fracture exists dimple, the matrix changes the direction of horizontal crack.
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