A kind of preparation method of silicon carbide film continuous carbon fiber plate

Abstract

A method for preparing a continuous carbon fiber plate with a silicon carbide film, characterized in that the continuous carbon fiber plate is formed by continuously depositing silicon carbide on the surface of a heated carbon fiber bundle to form a silicon carbide film by introducing process gas into a continuous carbon fiber plate coating machine for silicon carbide film, With the thickening of the silicon carbide film, the adjacent carbon fiber bundles are linked together to form a continuous carbon fiber plate of silicon carbide film. The present invention uses a silicon carbide film continuous carbon fiber plate coating machine to directly heat the carbon fiber bundles. Most of the silicon carbide generated by the high-temperature cracking of the process gas is deposited on the surface of the carbon fiber bundles, and a very small part is deposited on the heat shield. The distance between the carbon fiber bundles, The thickness of the silicon carbide film continuous carbon fiber plate and the silicon carbide film can be randomly selected, which not only saves raw materials, saves energy, but also has high production efficiency.

Description

technical field [0001] The invention relates to a preparation method of carbon fiber and ceramic composite material, belonging to the technical field of composite material preparation. Background technique [0002] The silicon carbide film deposited on the surface of carbon fiber is usually prepared intermittently by placing carbon fiber in a deposition furnace, which is very inefficient, and the length and shape of carbon fiber cannot meet the needs of diversity. In addition, carbon fiber is passively heated in the batch furnace, and most of the silicon carbide is deposited on the inner wall of the crucible at a higher temperature, which consumes a lot of energy and gets twice the result with half the effort. In addition, large-scale thermal equipment uses silicon carbide ceramic plates, silicon carbide ceramic tubes, silicon carbide ceramic square beams, etc., whose structural strength is low, and high-strength carbon fiber-ceramic composite materials are urgently needed t...

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Problems solved by technology

[0002] The silicon carbide film deposited on the surface of carbon fiber is usually prepared intermittently by placing carbon fiber in a deposition furnace, which is very inefficient, and the length and shape of carbon fiber cannot meet the needs of diversity

In addition, carbon fiber is passively heated in the batch furnace, and most of the silicon carbide is deposited on the inner wall of the crucible at a higher temperature, which consumes a lot of energy and gets twice the result with half the effort

In addition, large-scale thermal equipment uses silicon carbide ceramic plates, silicon carbide ceramic tubes, silicon carbide ceramic square beams, etc., whose structural strength is low, and high-strength carbon fiber-ceramic composite materials are urgently needed to replace

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