Ablative material formed by compounding fiber cloth and preparation method of ablative material

Abstract

The invention relates to an ablative material formed by compounding fiber cloth and a preparation method of the ablative material. The outer layer of the ablative material is an ablative layer mainly composed of viscose-based carbon fiber cloth and phenolic resin, and the inner layer of the ablative material is a heat insulation layer composed of phenolic resin and microspheres. The viscose-based carbon fiber cloth is formed by interweaving warp yarns and weft yarns, all the warp yarns on the viscose-based carbon fiber cloth are parallel to the plane where any bent warp yarn is located, all the weft yarns on the viscose-based carbon fiber cloth are parallel to the plane where any bent weft yarn is located, and the warp densities and the weft densities of all the warp yarns and the weft yarns are the same. The preparation method comprises the following steps that a plurality of layers of viscose-based carbon fiber cloth are sewn by using a plurality of strands of polyacrylonitrile carbon fibers to obtain a prefabricated part; the prefabricated part is soaked with phenolic resin, and an ablation layer is obtained after hardening treatment; the ablative layer and the heat insulation layer are subjected to mold pressing, and the ablative material is obtained; and the method can be used for preparing the viscose-based carbon fiber cloth with a specific curved surface form. The ablative material formed by compounding the fiber cloth is sufficient in thermal protection capability and light in weight, and does not break down in use.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to an ablation material compounded by fiber cloth and a preparation method thereof. Background technique [0002] With the rapid development of aerospace technology in recent years, the research on near-space vehicles and long-duration flight weapons has attracted widespread attention from all over the world. When the aircraft cruises at supersonic speed, breaks out of the atmosphere, and returns to the ground, its surface often faces harsh working environments with high temperature, high pressure, high heat flow, and high enthalpy. The surface temperature of the material can reach thousands of degrees Celsius; therefore, in order to protect the aircraft and its In order to prevent the internal structure from being burned, it is necessary to take thermal protection measures to make the aircraft and its internal structure work within a safe temperature range. On the other ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem of safety caused by the weak point of the ablation material in the prior art, and to provide an ablation material composited by fiber cloth and its preparation method

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