Friction and wear properties of potassium titanate whisker-glass fiber/benzoxazine hybrid composites

Potassium titanate whisker (K₂O·6TiO₂) was utilized to modifiy the friction and wear properties of benzoxazine (BOZ) resin and glass fiber/benzoxzine (GF/BOZ)composites. Friction and wear properties and modification mechanism of K₂O·6TiO₂/BOZ composites and K₂O·6TiO₂-GF/BOZ hybrid composites were analyzed. The results show that the friction coefficients and specific wear rates of K₂O·6TiO₂/BOZ composites and K₂O·6TiO₂-GF/BOZ hybrid composites decrease significantly compared with BOZ resin and GF/BOZ composites due to the addition of K₂O·6TiO₂. K₂O·6TiO₂ significantly alleviate the friction adhesion of BOZ resin and GF/BOZ composites and reduce the friction coefficients. Meanwhile the abrasive wear are also alleviated. During the friction process of the GF/BOZ composites, friction stress firstly break the interface between GF and BOZ resin, and then induce the destruction of BOZ resins in and between the GF bundles and GF interlaminations, making the friction coefficient of GF/BOZ composites lower than that of BOZ resin but the specific wear rates higher than that of BOZ resin. With the incorporation of K₂O·6TiO₂, the specific wear rate of K₂O·6TiO₂-GF/BOZ hybrid composites effectively reduces. The friction coefficients and specific wear rates of BOZ resin, GF/BOZ composites and K₂O·6TiO₂-GF/BOZ hybrid composites are 0.34 and 0.66×10^-6 mm³·(N·m)^-1, 0.19 and 1.2×10^-6 mm³·(N·m)^-1, 0.09 and 0.69×10^-6 mm³·(N·m)^-1, respectively.