Carbon/carbon composite material densification method, stock column tool and assembling method

Abstract

The invention belongs to the technical field of carbon material preparation, and particularly discloses a carbon / carbon composite material densification method, a stock column tool and an assembling method.The method comprises the steps that a base, a tray, an air inlet splitter plate and a plurality of crucible side preforms are subjected to stock column assembling according to a preset sequence; after the assembled stock column is lifted into a deposition furnace through a lifting appliance to be sealed, a first deposition process is executed according to a preset first gradient heating and pressurizing process, after the first deposition process is executed to reach a first time threshold value, the stock column is cooled and taken out, and surface impurities are removed; and carrying out stock column assembly on the base, the tray, the air inlet splitter plate and the plurality of crucible upper preforms subjected to impurity cleaning according to a preset sequence, carrying out a second-time deposition process according to a second gradient heating and pressurizing flow, cooling the stock column and taking out the stock column after the second-time deposition process is carried out to reach a second time threshold, and thus obtaining the crucible upper. And cleaning surface impurities to obtain the carbon / carbon composite material. And through two times of deposition, the compactness of the composite material is improved, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a carbon / carbon composite material densification method, material column tooling and assembly method. Background technique [0002] Carbon / carbon composite material refers to a type of composite material with carbon fiber as the reinforcement and carbon as the matrix. As an important member of the carbon fiber composite family, carbon / carbon composites have the characteristics of low density, high specific strength, high specific modulus, high thermal conductivity, low thermal expansion coefficient, good fracture toughness, wear resistance, and ablation resistance, especially It is the material with the best high temperature resistance among all known materials, and has been widely used in aerospace, nuclear energy, chemical industry, military, medical , engineering manufacturing and other high-tech fields, but due to the long production cycle, co...

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Problems solved by technology

As an important member of the carbon fiber composite material family, carbon / carbon composite materials have the characteristics of low density, high specific strength, high specific modulus, high thermal conductivity, low thermal expansion coefficient, good fracture toughness, wear resistance, and ablation resistance. Its strength will not decrease but will increase with the increase of temperature. It is the material with the best high temperature resistance among all known materials. It has been widely used in aerospace, nuclear energy, chemical industry, military and medical treatment. , engineering manufacturing and other high-tech fields, but due to the long production cycle, complex process and expensive production costs, the wide application of carbon / carbon composite materials has been severely restricted

[0003]Therefore, the low-cost dense production method of carbon / carbon composites has become the key technology for large-scale application and production, and the key research of carbon / carbon composites One of the directions, and its long production cycle and expensive production cost are mainly due to the long densification cycle. The traditional densification process needs to go through repeated chemical vapor deposition → furnace → machining and other processes, and it takes 1000-2000 to reach the design density. Hours to complete, and the number of products produced in a single batch is small

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