Microstructure and mechanical properties of 2A12 Al alloy powder reinforced with continuous carbon fibers manufactured by hot isostatic pressing

Hot isostatic pressing (HIP) method was used to prepare a composite material consisting of M40JB continuous carbon fibers (C-f) in 2A12 Al alloy powder, to study its mechanical properties and interface bonding situation of composite materials. The microstructure, fracture surface and C-f/Al interface characteristics were analyzed by optical microscope(OM), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results show that: the tensile strength and plasticity of the composite increase by 5% and 54% respectively; the fracture mechanism of the composite is brittle fracture; the fractures of the aluminum alloy are along the powder particle interface; carbon fibers are pulled out and fractured in C-f/AI interface fracture place; the interfacial reaction of C-f/AI mainly occurs between C and Al atoms, and the diffusion reaction product is Al4C3 intermetallic compound.