Abstract: Three-dimensional five-dimensional braided M40J carbon fiber preform was used as reinforcement and ZL301 as matrix alloy. Three-dimensional five-dimensional Cf/Al composites were fabricated by vacuum pressure infiltration. The microstructure and phase composition of three-dimensional five-dimensional Cf/Al composites were studied. The mechanical behavior of axial bending deformation and the macro-morphology of bending failure were analyzed.The results show that the axial distribution of fibers is uniform and there is a small amount of infiltration defects in the braided yarns. The brittle Al4C3 phase exists at the interface, which is the key to the bending mechanical properties.The mechanical behavior of composites under axial bending deformation presents remarkable non-linear characteristics. The deformation process of composites at room temperature, 350 ℃ and 400 ℃ can be divided into three stages:elastic deformation stage, elastic-plastic deformation stage and plastic fracture stage.
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2020, Vol. 34 
