Process for manufacturing carbon/carbon composite material with needling structure

Abstract

The invention belongs to a process for manufacturing a carbon / carbon composite material, and particularly relates to a process for manufacturing a carbon / carbon composite material with a needling structure. The invention aims to provide a process for manufacturing a carbon / carbon composite material with a needling structure, which can adopt a pre-oxidized fiber as a raw material of a prefabricated member and has controllable size and large stretching strength. The process has the advantages that a relation between the contraction coefficient of a pre-oxidized fiber felt and a carbonization process parameter is mastered through fine control of a carbonization process after the pre-oxidized fiber felt and a carbon fiber felt are mixed according to a certain proportion, and the carbon fiber felt plays a certain limitation role of contraction in the carbonization process of the pre-oxidized fiber through content control of the carbon fiber felt, namely equivalently providing a carbonization traction force to the pre-oxidized fiber so as to play a role in improving the strength of the material.

Description

technical field [0001] The invention belongs to a carbon / carbon composite material manufacturing process, in particular to a needle-punched structure carbon / carbon composite material manufacturing process. Background technique [0002] Carbon / carbon composites are mainly composed of prefabricated reinforced skeleton and matrix carbon. The shape of carbon / carbon products is made of chopped fibers, continuous fibers or a mixture of the two in a certain proportion in the form of weaving or molding, as a reinforced skeleton of carbon / carbon composite materials, and this reinforced skeleton is called a prefabricated part. The raw materials and structures of prefabricated parts are different, resulting in great differences in material properties. As the raw material of prefabricated parts, pre-oxidized wire can greatly reduce the cost of raw materials. Although pre-oxidized wire is cheaper, carbon fiber is mainly used as the main raw material to manufacture carbon / carbon composit...

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Problems solved by technology

As the raw material of prefabricated parts, pre-oxidized wire can greatly reduce the cost of raw materials. Although pre-oxidized wire is cheaper, carbon fiber is mainly used as the main raw material to manufacture carbon / carbon composite materials at present, because pre-oxidized wire shrinks in the carbonization process. Large, the size change and deformation of the prefabricated parts bring great trouble to the control of the shape of the material, and at the same time, carbonization without traction, the strength of the obtained carbon fiber is obviously low, resulting in low performance of the prepared carbon-carbon / composite material. Tensile strength is generally only 6 ~ 7MPa

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