Preparation of SiCf/Ti Composites and Its Failure Behavior of In-situ Three-point Bending
Using continuous ceramic SiC fibers and TA2 metallic foil as raw materials,continuous ceramic SiC fiber reinforced Ti matrix composites were prepared by foil-fiber-foil method.The microstructure,interfacial behavior and in-situ three-point bending failure analysis of the prepared composites were carried out.The results show that,at 900 ℃/45 MPa/30 min,the reinforced SiC fiber achieves good metallurgical bonding with the matrix metal Ti,and the element diffusion occurs at the fiber/matrix interface,and TiC is the main product at the interface.In the process of bending load,the crack propagation form of the composite is dendritic polyline bifurcation,and the reinforced fiber deflects and passivates the longitudinal propagation crack,which effectively prolongs the propagation path of the crack.
万方数据
维普
