Composite material of silicon carbide and carbon nanotube and preparation method thereof

Abstract

The invention relates to a composite material of silicon carbide and carbon nanotube and a preparation method thereof. Macroscopic bodies of the carbon nanotubes are used as performs, a chemical vapor deposition method is used for pyrolysis of a silicon-containing precursor, and then the silicon carbide is deposited on the carbon nanotube to prepared the composite material of the silicon carbide and the carbon nanotube, with a mass percent of the carbon nanotube being 0.5-90 %. By selecting the macroscopic bodies of the carbon nanotubes of various orientations and arrangements as performs, the composite material of the silicon carbide and the carbon nanotube with high dispersion, high volume content and various orientations and arrangements can be obtained. By designing fiber performs, the composite material of the silicon carbide and the carbon nanotube with various forms such as fibers and blocks and various sizes can be constructed and prepared. The composite material of the silicon carbide and the carbon nanotube with various mechanical and electrical properties can be obtained, and may be used as high-performance composite materials, conductive and thermal conductivity materials and functional materials in fields of aerospace, national defense equipment, functional material devices, etc.

Description

technical field [0001] The invention relates to a composite material of silicon carbide and carbon nanotubes and a preparation method thereof. Specifically, a carbon nanotube macroscopic body is used as a prefabricated body, and silicon carbide is deposited on carbon nanotubes by pyrolyzing a silicon-containing precursor by chemical vapor deposition. The macroscopic body prepares a composite material of silicon carbide and carbon nanotubes, and belongs to the field of nanomaterials. Background technique [0002] Silicon carbide composite materials have excellent mechanical and high temperature properties such as light weight, high strength, high toughness, high temperature resistance, thermal shock resistance, etc., and have physical properties such as high electrical conductivity and high thermal conductivity, and are widely used in aerospace, national defense equipment and other high-tech It is also widely used in machinery, chemical industry, electronic industry and othe...

AI Technical Summary

Problems solved by technology

This method uses a catalyst, the process is complicated, the conditions are relatively harsh, and the cost is high

[0007] There is no report on the preparation of composite materials of silicon carbide and carbon nanotubes by using the chemical vapor deposition method with the macroscopic body composed of carbon nanotubes as the preform.

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