Preparation method of continuous silicon carbide micro-nano fiber bundle

Abstract

The invention discloses a preparation method of a continuous silicon carbide micro-nano fiber bundle. The method comprises the following steps of (1) conducting precursor synthesis: synthesizing polyaluminocarbosilane; (2) preparing an electrostatic spinning solution, namely preparing the polyaluminocarbosilane into the electrostatic spinning solution, and storing for later use; (3) preparing a precursor fiber bundle to obtain a precursor micro-nano fiber bundle; and (4) preparing a silicon carbide micro-nano fiber bundle by high-temperature sintering: performing high-temperature sintering onthe precursor micro-nano fiber bundle by adopting a sectional heat treatment mode to prepare the continuous silicon carbide micro-nano fiber bundle. According to the method, electrostatic spinning anda precursor conversion method are combined together, so that the continuous silicon carbide micro-nano fiber bundle can be obtained, and the silicon carbide micro-nano fiber bundle prepared through the method is high in orientation degree and strength, can be used as high-performance composite material reinforced fibers, and is applied to the high-tech fields of aerospace, weapons, ships, nuclearindustry and the like.

Description

technical field [0001] The invention relates to a method for preparing continuous silicon carbide micro-nano fiber bundles. Background technique [0002] With the continuous advancement of science and technology, the military industry has higher and higher requirements for materials, especially in the demand for materials with high temperature resistance, oxidation resistance, high tensile strength, and good creep resistance. However, due to the lack of independent intellectual property rights for high-performance composite materials, materials with mature technology cannot meet the design and manufacture of advanced military equipment, which seriously restricts the development of some high-tech fields such as aerospace, weapons, ships and nuclear industries. . Therefore, there is an urgent need to carry out research on an ideal high-performance composite reinforcement fiber. [0003] Continuous silicon carbide micro-nano fiber bundles (including continuous silicon carbide...

AI Technical Summary

Problems solved by technology

On the one hand, as far as the research of silicon carbide nanofibers is concerned, the methods for preparing continuous silicon carbide nanofibers at home and abroad mainly include precursor conversion method, chemical vapor deposition method, activated carbon fiber conversion method, etc., but the silicon carbide prepared by these methods Nanofibers are mostly whiskers, which greatly limits the application level of materials

On the other hand, the current fiber bundles prepared by electrospinning are all polymer fiber bundles, and there is no research on the use of electrospun polymer fiber bundles to form SiC micro-nano fiber bundles through continuous spinning and high-temperature sintering.

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