SiCf/SiC composite material flame tube and automatic preparation method thereof

Abstract

The invention discloses an automatic preparation method of a SiCf / SiC composite material flame tube. The preparation method comprises the following steps: preparing an interface layer from SiC fibersby adopting chemical vapor deposition, so as to obtain SiC fibers with a continuous interface layer; performing unidirectional tape laying and filament winding on the SiC fibers with the continuous interface layer according to the fiber volume and fiber orientation obtained by simulation calculation, so as to obtain net size forming preform; performing densifying treatment on the obtained preformby adopting a reactive melt infiltration process and the chemical vapor deposition process; preparing an environmental barrier coating on the surface of the obtained preform; finally, continuously preparing a thermal barrier coating on the surface, thereby fully intelligently obtaining the high-density SiCf / SiC composite material flame tube. The SiCf / SiC composite material flame tube prepared withthe method disclosed by the invention has the characteristics of high temperature resistance and long service life and also has the advantages such as low thermal expansion coefficient, high thermalconductivity, high thermal shock resistance and excellent mechanical property. Meanwhile, the preparation method is high in degree of automation, short in production cycle, low in cost and controllable in quality.

Description

technical field

[0001] The invention relates to the technical field of aviation structural materials, in particular to a SiC f / SiC composite material flame cylinder and its automatic preparation method. Background technique

[0002] The combustion chamber is one of the core components of an aero-engine. Its main function is to convert the chemical energy of the fuel into heat energy through combustion, so as to improve the ability of the gas to expand in the turbine and nozzle. In the structural composition of the combustion chamber, the flame tube is The place where the combustion is organized is a key component to ensure air splitting, sufficient combustion, uniform mixing and effective cooling of the wall. The reliability, economy and life of the combustion chamber depend to a large extent on the reliability and reliability of the flame tube. Therefore, the development of a high-performance and long-life combustor flame cylinder plays a vital role in improving engine pe...

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