Improved Performances of SiBCN Powders Modified Phenolic Resins-Carbon Fiber Composites

The effect of SiBCN powder on properties phenolic resins and composites was analyzed. Compared with resins, the thermal stability modified (the resins) by characterization thermogravimetric analysis (TGA) improved clearly. It found X-ray photoelectron spectroscopy (XPS) that reactions between pyrolysis product were main factor increased residual weight. TGA static ablation a muffle furnace used to illustrate roles increasing oxidation resistance powder-modified resin–carbon fiber (SiBCN–phenolic/C composites), oxidative analyzed diffraction (XRD), scanning electron microscopy (SEM) Fourier transform infrared (FTIR). For SiBCN–phenolic/C composites, occurrence reaction formation protective crust contributed improving resistance. result oxygen-acetylene test showed linear rate (LAR) mass (MAR) reduced from 0.052 ± 0.005 mm/s 0.038 0.004 0.050 g/s 0.043 0.001 introducing powder, respectively. mechanism after introduction investigated. high melt-viscosity caused remain surface protect internal carbon fibers. volatilization oxide can consume energy oxygen, thus SiBCN–Ph composite improved.