Polysilazane high-temperature-resistant coating for carbon fiber composite material and preparation method of polysilazane high-temperature-resistant coating

The invention discloses a polysilazane high-temperature-resistant coating for a carbon fiber composite material and a preparation method of the polysilazane high-temperature-resistant coating. The high-temperature-resistant coating is composed of 30 parts-40 parts of organosilazane resin, 45 parts-60 parts of butyl acetate, 12 parts-20 parts of a high-temperature-resistant pigment, 2 parts-5 parts of an anti-settling agent, 1 part-2 parts of fumed silica and 1 part-2 parts of a dispersing agent. When the surface of a carbon fiber composite material is coated with the high-temperature-resistant coating, the coating layer does not change color, crack or fall off under the condition that the coating is heated for 1 hour in a muffle furnace at the temperature of 800 DEG C. The organosilazane resin can be subjected to ceramic conversion at high temperature to produce a cross-linked network of silicon nitride, silicon oxide and the like, and has excellent physical properties such as high temperature resistance, wea