Abstract
Two-dimensional T300 carbon fiber-reinforced aluminum alloy matrix (2D CF/Al) composites were prepared by the liquid extrusion infiltration (LEI) process with the matrices of 6061Al and ZL102 alloys. Scanning electron microscopy (SEM) detected a satisfactory infiltration effect for both composites. The fiber distribution was uniform, and casting microdefects were not revealed. Transmission electron microscopy (TEM) analysis disclosed the matrix-carbon fibers interface reaction, the brittle Al4C3 phase. Al4C3 sizes were found to be about 150 and 400 nm in 2D CF/6061Al and 2D CF/ZL102 composites, respectively, the interface reaction of a ZL102 matrix was more pronounced. As compared to pure cast alloys, the ultimate tensile strength increased by 134.5. SEM analysis of the tensile specimen fracture demonstrated that the fracture of a 2D CF/6061Al composite was reasonable and for a 2D CF/ZL102 composite it was via the brittle mode, these were caused by the interface bonding.
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