Reinforcing method of continuous carbon fiber toughened ceramic matrix composite material

Abstract

The invention relates to the technical field of ceramic composite materials, and provides a reinforcing method of a continuous carbon fiber toughened ceramic matrix composite material. The reinforcing method comprises the following steps: connecting the connecting parts of continuous carbon fiber toughened ceramic matrix composite material components by using a patch material to complete the reinforcing. According to the method, the patch with better ablation resistance is adopted to reinforce the component, the patch is ablated firstly in the test, and the component below is not ablated or is ablated slightly, so that the continuity of carbon fibers of the whole component is ensured, and the use performance of the whole component is effectively improved. Compared with patches made of the same material as the component, the patch used in the invention can adapt to a more stringent test environment; under the same test environment, the patch used in the invention is smaller in size and lighter in weight; and the applicable use environment range is wide.

Description

technical field [0001] The invention relates to the technical field of ceramic composite materials, in particular to a reinforcement method for continuous carbon fiber toughened ceramic matrix composite materials. Background technique [0002] Continuous carbon fiber toughened silicon carbide ceramic matrix composite is an ideal high-temperature structural material, which has a series of advantages such as high temperature resistance, low density, high strength, and thermal shock resistance. It has a wide range of applications and prospects in the aerospace field. When continuous carbon fiber toughened silicon carbide ceramic matrix composites are used in high-temperature air flow and particle erosion environments, the components will suffer from wear and oxidation damage, resulting in damage to the components and making them unable to continue to be used. During the service of composite components, usually only the parts with the most severe local service conditions (such a...

AI Technical Summary

Problems solved by technology

When continuous carbon fiber toughened silicon carbide ceramic matrix composites are used in high-temperature airflow and particle erosion environments, the components will suffer from wear and oxidation damage, resulting in damage to the components that cannot continue to be used

During the service of composite components, usually only the parts with the most severe local service conditions (such as the highest local temperature, a large number of local particle erosion) have serious defects, which makes the components unusable; even under extreme conditions, the components are severely damaged locally Can cause composite components to fail to meet harsh service conditions

Great waste of development time and cost

[0003] CN106986664A discloses a method of repeatedly impregnating and cracking polycarbosilane using carbon cloth and SiC micropowder to C f / The method of repairing the damaged area of ​​SiC composite material, this method only repairs the damaged component, and the repaired area is close to the mechanical properties of the overall component composite material, which cannot effectively prevent the repaired area from being damaged and failed again. At the same time, the repaired area and the material body The lack of physical connection between the patches causes the patch to fall off easily in the heat environment during use, resulting in repair failure; CN104150958A uses carbon fiber prepreg cloth to fill the defective part, then molds and solidifies, coats the slurry, and then pyrolyzes and deposits SiC coating The method of repairing ceramic matrix composites, but this method also lacks physical connection, and it is easy to fall off and fail in the heat environment