Characterization of domestic high performance carbon fibers and mechanical properties of carbon fibers reinforced matrix composites

The morphologies and surface chemical properties of domestic T800 grade carbon fibers A and imported Toray T800H were characterized by means of scanning electronic microscopy(SEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS). The mechanical properties of two kinds of carbon fiber reinforced high toughness epoxy resin matrix composites were studied. The results show that the surface properties of carbon fiber have a significant effect on the interface properties of the composite. The surface roughness and surface chemical activity of domestic carbon fiber A are close to those of Toray T800H carbon fiber, and the interfacial properties of the two kinds of carbon fiber composites are basically the same at room temperature, which indicates that domestic carbon fiber composite M-A has good interfacial properties. Under the condition of 130 degrees C and wet state, both the retention rate of interlaminar shear strength and 90 degrees tensile strength of domestic carbon fiber composite M-A are slightly higher than that of Toray carbon fiber composite M-T800H, which indicates that the domestic carbon fiber composite M-A has good hydrothermal property.