Silicon carbide whisker modified boron nitride composite material, preparation method and application thereof, boron nitride complex and preparation method thereof

The invention belongs to the technical field of superhard compounding, and particularly relates to a silicon carbide whisker modified boron nitride composite material, a preparation method and application thereof, a boron nitride complex and a preparation method thereof. The invention provides a preparation method of a silicon carbide whisker modified boron nitride composite material, which comprises the following steps: mixing a boron nitride aqueous dispersion, a first alcohol solvent, an alcohol solution containing a silicon source and a pH value regulator, and carrying out hydrolysis reaction to obtain silicon dioxide coated boron nitride; and mixing the silicon dioxide coated boron nitride with a carbon source, and calcining to obtain the silicon carbide whisker modified boron nitride composite material. The silicon carbide whiskers grow on the surface of the boron nitride in an in-situ growth mode, and the obtained silicon carbide whiskers and boron nitride have good bonding performance and dispersity.