A method for forming a thin-walled conical cylindrical ceramic matrix composite component

Abstract

The invention relates to a forming method of a ceramic matrix composite, in particular to a forming method of a thin-walled conical cylinder-shaped ceramic matrix composite component. According to theforming method, a combined setting mode of autoclave setting and graphite die shape maintenance is adopted; an autoclave technology is more suitable for formation of a resin matrix composite, the pressure in the autoclave is smaller than 1MPa generally, the temperature in the autoclave is smaller than 300 DEG C generally, and formation is completed once for all. The forming method provided by theinvention can solve the problem of large difficulty in formation of the thin-walled conical cylinder-shaped ceramic matrix composite component; and compared with the existing forming method, the forming method can be used for forming the thin-walled conical cylinder-shaped ceramic matrix composite component with uniform volume fraction of fibers and high contour accuracy. The forming method fullyutilizes the advantage of being suitable for forming the thin-walled conical cylinder-shaped component of the autoclave and the advantages of temperature resistance and stabilization in setting of agraphite die, the component is transferred into the graphite die for shape maintenance after being subjected to setting with the autoclave, and the component forming accuracy in a subsequent high-temperature dense technology is ensured.

Description

technical field [0001] The invention relates to a molding method of a ceramic matrix composite material, in particular to a molding method of a thin-walled conical cylindrical ceramic matrix composite material component. Background technique [0002] Ceramic matrix composites not only have many advantages such as high temperature resistance, oxidation resistance, wear resistance and corrosion resistance of ceramic materials, but also use the reinforcement and toughening effect of continuous fiber and other reinforcements to greatly improve the fracture toughness and external impact load resistance of ceramic materials. performance. Continuous fiber-reinforced silicon carbide ceramic matrix composites are more and more widely used in the fields of high thrust-to-weight ratio aero-engine hot-end components and hypersonic aircraft thermal protection systems due to their good high-temperature stability and high-temperature mechanical properties. [0003] In the manufacturing pr...

AI Technical Summary

Problems solved by technology

The reason why molding and shaping are not suitable for thin-walled conical and cylindrical components is that the working mode of flat plate pressurization of the molding machine is mostly suitable for the shaping of plate-shaped components; Due to the limitation, there is a certain deviation between the actual size and the design size. When the molding is finalized, the inner and outer surfaces are rigid molds. When the mold is closed, it is easy to produce molding defects such as wrinkles due to the deviation between the size of the preform and the size of the mold cavity.

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