Method for rapid preparation of c/sic ceramic composites with matrix pre-introduction

Abstract

The invention discloses a method for rapidly preparing a C / SIC ceramic composite material with a pre-introduced matrix, and relates to a ceramic matrix composite material and a preparing method thereof. According to the method, the structure of a fabric body is improved, mold pressing and matrix pre-introducing method are creatively provided, the period of the C / SIC ceramic composite material prepared with the PIP technology is greatly shortened, and therefore the aim that the preparing cost is reduced is achieved. The method includes the steps of fabric body processing, fabric body pretreating, precursor soaking, solidifying, mold pressing, high-temperature splitting, soaking, solidifying and splitting; after the increased mass is smaller than 1% of the raw mass, soaking and splitting are stopped, and material preparing is completed. According to the C / SIC ceramic composite material, on the premise that the production period is shortened by 30% to 50%, and the cost is reduced by 30% to 40%, the highest bending strength can reach 325 MPa, and the highest tensile strength can reach 180 MPa.

Description

technical field [0001] The invention relates to the technical field of composite ceramic materials, in particular to a method for rapidly preparing C / SiC ceramic composite materials by pre-introducing a matrix. Background technique [0002] C / SiC ceramic composites have the characteristics of high strength, high toughness, good corrosion resistance and low density at high temperature. In high temperature, high erosion and some harsh environments, especially in the leading edge of the sharpened wing of aerospace vehicles It has great potential for special parts on high-speed aircraft that need to withstand extremely high temperatures, anti-ablation, and anti-scouring conditions. As the main heat-resistant material, silicon carbide ceramic composite materials are widely used in aviation, aerospace and other fields. [0003] At present, the most common methods for preparing C / SiC composites are precursor impregnation pyrolysis (PIP) and chemical vapor infiltration (CVI), both ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of long preparation period and high cost in the existing C / SiC ceramic composite materials, and propose a method for rapidly preparing C / SiC ceramic composite materials with the matrix pre-introduced, compared with the traditional PIP process , this method achieves the purpose of reducing raw materials, shortening the production cycle, and reducing product costs by improving the weaving method of the braided body, adding molding, and pre-introducing the matrix.

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