High-performance carbon fiber needling preform and preparation method thereof

Abstract

The invention discloses a high-performance carbon fiber needling preform and a preparation method thereof, and the preparation method comprises the following steps: broadening common long carbon fiber tows to form broadened continuous long carbon fibers with the fiber tows within a preset range; preparing a short carbon fiber net tire by adopting broadened continuous long carbon fibers; multiple types of unit layers are prepared from broadened continuous long carbon fibers and chopped carbon fibers through needling; and performing composite needling on the unit layers of the same type to prepare the high-performance carbon fiber needling preform. According to the technical scheme, the problems that the loss of the fiber strength is large due to the preparation mode of an existing carbon fiber integral needling preform, the densification degree is limited, the density of a finally formed product is not high, the strength is not high and the like are solved, and the problems existing in various applications are solved.

Description

technical field [0001] The invention relates to but not limited to the technical field of carbon fiber composite materials, in particular to a high-performance carbon fiber needle-punched preform and a preparation method thereof. Background technique [0002] Carbon / carbon or carbon / ceramic composite materials can be widely used in aviation, rail transit, automobiles and other brake materials, and aerospace high-temperature ablation-resistant Structural materials and thermal structural materials for high-temperature equipment and other fields have broad application prospects. Carbon fiber integral needle-punched prefabricated body is a type of prefabricated body structure widely used in carbon / carbon or carbon / ceramic composite materials at present. This structure overcomes the shortcomings of weak interlayer strength of 2D laminated prefabricated The weaving prefabricated body has the disadvantages of complex process and high cost. [0003] However, the carbon fiber integ...

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Problems solved by technology

[0004] The purpose of the present invention: the embodiment of the present invention provides a high-performance carbon fiber needle-punched preform and its preparation method to solve the problem that the existing carbon fiber integral needle-punched preform has a large loss of fiber strength due to its preparation method. And the degree of densification is limited, the density of the final product is not high, and the strength is not high, and the problems in various applications

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