Ceramic-based composite material full-ring flame tube, shaping mold and preparation method of ceramic-based composite material full-ring flame tube

Abstract

The invention relates to a ceramic-based composite material full-ring flame tube, a shaping mold and a preparation method of the flame tube, and aims to solve the technical problems that an existing high-temperature alloy material flame tube is high in density, and the densification degree of the ceramic-based composite material flame tube prepared by adopting CVI and PIP technologies is low. The flame tube comprises an inner tube, an outer tube and a connecting rod, wherein the inner tube and the outer tube are an integrated rotary body and comprise an inner fiber layer, an interface layer and an outer silicon carbide base layer from inside to outside. The shaping mold comprises an inner cylinder inner mold shaping mold, an inner cylinder outer mold shaping mold, an inner cylinder base plate shaping mold, an inner cylinder shape correction shaping mold, an outer cylinder inner mold shaping mold, an outer cylinder outer mold shaping mold, an outer cylinder base plate shaping mold and an outer cylinder shape correction shaping mold. The preparation method comprises the following steps: 1, weaving fiber cloth; 2, preparing a fiber preform; 3, preparing an interface layer; 4, preparing a silicon carbide base layer; 5, processing into a semi-finished product; 6, carrying out homogeneous ligation; and 7, performing densification treatment to obtain the target flame tube.

Description

technical field [0001] The invention relates to a shaping preparation method of a full-ring flame cylinder of a ceramic matrix composite material, in particular to a full-ring flame cylinder of a ceramic matrix composite material, a shaping mold and a preparation method thereof. Background technique [0002] The combustion chamber of an aero-engine includes an air intake device, a shell, a flame cylinder, a nozzle, and an igniter. The flame cylinder is the core component containing the main gas flow in the combustion chamber, and is most severely eroded by the high-heat environment and air flow. At present, the commonly used high-temperature alloy material flame tube usually has problems such as heat resistance temperature not higher than 1100°C and heavy weight. [0003] Ceramic matrix composites have low density (2.2~3.0g / cm 3) , corrosion resistance, high strength and toughness, high heat-resistant temperature (1150-1350 ° C), etc., the density of ceramic matrix composit...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the high density of the flame tube of the current superalloy material leads to the excessive weight of the flame tube, and the technology of preparing the full-ring flame tube of ceramic matrix composite material with a low densification degree by using chemical vapor deposition + precursor impregnated cracking technology problem, a ceramic matrix composite full-ring flame cylinder, a shaping mold and a preparation method thereof are proposed

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