Liquid forming preparation method of composite material with powder filler

Abstract

The invention relates to a liquid forming preparation method of a composite material with powder filler. The method includes the steps that a fiber fabric and an isolation film are cut according to adesigned shape and size and laid in a graphite mold, the fabric is laid on the surface of the isolation film, filler powder is evenly scattered on the surface of the fabric in proportion, then the operations of isolation film laying, fabric laying and powder scattering are sequentially carried out, and the operations are repeated until a designed number of layers and thickness are obtained; aftermold assembly, the graphite mold is transferred into an ultrasonic processor for ultrasonic oscillation processing; then the graphite mold and the material inside the graphite mold are placed in a high-temperature furnace to burn the isolation film in the high-temperature furnace, the material is transferred into a liquid forming mold after cooling, and resin injection, curing, demoulding and other liquid forming operations are sequentially carried out; finally, the composite material with the powder filler is obtained. By means of the method, through ultrasonic oscillation, the powder fillerenters fiber bundles and is evenly dispersed more quickly, and then the composite material of a uniform structure is obtained through liquid forming.

Description

technical field [0001] The invention relates to a liquid molding preparation method of a composite material with powder filler, which belongs to the technical field of composite material preparation. Background technique [0002] Composite materials are widely used in the aerospace field due to their light weight, high strength, and strong designability. Composite materials are generally composed of resin (organic and inorganic) matrix continuous phases and fiber-reinforced phases. Based on certain structural or functional requirements For example, in order to improve the wear resistance or temperature resistance grade of the resin, increase the solid content or yield of the resin, and reduce the shrinkage of the ceramic matrix composite material in the subsequent molding or sintering process, it is usually necessary to add corresponding Powder filler. According to different needs, the types, particle sizes and proportions of powder fillers are different, and powders are us...

AI Technical Summary

Problems solved by technology

The main problem of this method is that the resin slurry is mainly brushed on the surface of the fabric, and the powder cannot fully enter the interior of the fiber bundles, and it cannot be uniformly dispersed in the entire range of the composite material.

In addition, there is a winding molding preparation method of ceramic matrix composite materials. The powder and resin matrix are mixed according to the proportion to prepare a slurry and placed in the glue tank, and then the fiber bundles are flattened and fully dipped in the glue tank. After extrusion, the prepreg is directly wound or rearranged for use. Since the fiber bundle is flattened and then passed through the slurry, this method can promote the powder filler to enter the fiber bundle and disperse evenly, but this method is only applicable For fiber bundles, only unidirectional prepreg tape can be prepared, which is not suitable for composite materials that require two-dimensional or three-dimensional fabric reinforcement phase, and special wet prepreg equipment is required, and the process is relatively complicated