Preparation method of heat-resisting plate for bias plate

Abstract

The invention belongs to the technical field of bias plates, and discloses a preparation method of a heat-resisting plate for a bias plate. The method comprises the following steps: (1) processing a carbon fiber preform according to the structure of a heat-resistant plate; (2) preparing a pyrolytic carbon interface layer on the surface of the carbon fiber preform by a CVI method; (3) repeating the steps of dipping, curing and low-temperature cracking for 2-4 times; (4) repeating the steps of dipping, curing and high-temperature cracking for 1-3 times; (5) carrying out mechanical rough machining; (6) repeating the steps of dipping, curing and low-temperature cracking for 2-4 times; (7) repeating the steps of dipping, curing and high-temperature cracking for 1-3 times; (8) carrying out mechanical finish machining; and (9) depositing a SiC coating by using a CVD method to obtain the heat-resistant plate for the bias plate. The method is short in preparation period, and the prepared heat-resisting plate is high in density, small in density gradient, extremely low in ablation rate, low in emissivity, good in oxidation resistance and scouring resistance and excellent in mechanical property.

Description

technical field [0001] The invention belongs to the technical field of deflector plates, and in particular relates to a method for preparing a heat-resistant plate used for deflector plates. Background technique [0002] The deflector deflects the high-temperature, high-pressure, and high-speed gas flow generated by the aircraft engine on the aircraft carrier to the outside, preventing the tail flame from threatening the aircraft carrier's equipment, other aircraft and personnel. The heat-resistant plate is the upper panel where the deflector plate is in direct contact with the exhaust flame of the engine. It mainly bears the scouring force of the aircraft exhaust flame and deflects the fuel flow in all directions. It is required to have high temperature resistance, seawater corrosion resistance, ablation resistance, and erosion resistance. . [0003] At present, metal materials are generally used for deflectors, and coatings with heat resistance and heat dissipation proper...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiencies of poor corrosion resistance, short life, and high thermal conductivity of the deflector plate, the purpose of the present invention is to provide a method for preparing a heat-resistant plate for the deflector plate. The present invention uses carbon fiber reinforced ceramic matrix composite material, The weight of the deflector can be greatly reduced, and the thermal conductivity of the deflector can be reduced; the present invention uses chemical vapor infiltration to prepare a pyrolytic carbon interface layer with a thickness of 1-2 μm, which is relatively thick, and the interface layer is uniform and continuous, and tends to be smooth. , the toughening effect is good, the interface layer is a continuous layered structure, and the combination with carbon fibers is good, which can effectively avoid the cracks that cannot be deflected at the interface and cross the fibers due to the strong bonding interface effect; use high and low temperature cycle impregnation-cracking process, improve the impregnation efficiency, reduce the production cycle, and thus reduce the cost; the introduction of nano-ceramic powder into the precursor slurry can greatly improve the sealing efficiency, improve the high temperature resistance, seawater corrosion resistance, erosion resistance and oxidation resistance of the material, Extended service life

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