Process for preparing carbon-carbon precast member for carbon-carbon/aluminium composite material

Abstract

The invention designs a kind of carbon - carbon / aluminum compound material with the carbon - carbon pre- workpiece preparation method, specially involves a kind the carbon - carbon pre- workpiece preparation method which prepares the high heat conduction, the low inflation carbon - carbon / aluminum compound material uses, is the inorganic compound material manufacture craft area of technology. The invention a kind of carbon - carbon / aluminum compound material uses the carbon - carbon pre- workpiece the preparation method, including following craft step: Pre- workpiece skeleton material preparation: May use in the following three kind of structures the person a kind, namely carbon fiber overall felt, or polypropylene nitrile pre- oxycellulose (PANOF) overall felt, or carbon fiber and textile fiber net in turn lamellar structure; Carries on the heat treatment to the pre- workpiece skeleton material; The heat treatment temperature is 970~1000deg.C, keeps warm for 2 hours; Take six hydrogenation three carbon as the forerunner body. Carries on chemistry gas phase seepage to the pre- workpiece skeleton, causes under the hot conditions the thermal decomposition, forms the thermal decomposition carbon to permeate in the pre- workpiece skeleton material and the deposition to the carbon fiber surface; Carries on the high temperature heat treatment to the above pre- workpiece under the 2200~~2300deg.C temperature, like this may prepare the carbon - carbon pre- workpiece. It may supply the high heat conduction, the inflation performance requirement carbon - carbon / aluminum compound material use. The invention craft is simple, the ease of operation, may reduce the cost.

Description

technical field [0001] The invention relates to a method for preparing a carbon-carbon prefabricated part for a carbon-carbon / aluminum composite material, in particular to a method for preparing a carbon-carbon prefabricated part for a carbon-carbon / aluminum composite material with high thermal conductivity and low expansion. It belongs to the technical field of inorganic composite material manufacturing technology. Background technique [0002] Carbon fiber reinforced aluminum matrix composites have excellent comprehensive properties such as high strength, high modulus, high thermal conductivity, and low thermal expansion. They have very important application prospects in the fields of aerospace, electronic information, and precision instruments. At present, the known method of preparing carbon / aluminum composite materials is to combine carbon fiber prefabricated parts and aluminum together at high temperature. One of the main problems of the used carbon fiber prefabricated...

AI Technical Summary

Problems solved by technology

At present, the known method of preparing carbon / aluminum composite materials is to combine carbon fiber prefabricated parts and aluminum together at high temperature. One of the main problems of the used carbon fiber prefabricated parts is that the strength of the made carbon fiber prefabricated parts is relatively poor, mainly relying on the frame , molds and other external means to maintain the structure and porosity of the prefabricated part; in the subsequent process of compounding with aluminum, under the influence of factors such as pressure and aluminum liquid infiltration, the carbon fiber prefabricated part is prone to deformation, thereby reducing the uniformity of fiber distribution , which is not conducive to the preparation of high-performance composite materials

On the other hand, under the condition of carbon fiber without coating protection, in order to control the interfacial reaction between carbon and aluminum, various process parameters need to be strictly controlled, so that the requirements for the preparation process conditions are particularly harsh, which affects the carbon / aluminum composite material. The rapid development and application of

At present, there are no relevant reports on the preparation of carbon-carbon / aluminum composite materials using carbon-carbon as prefabricated parts