A carbon-carbon prefabricated body and preparation method thereof

Abstract

The present invention provides a carbon-carbon prefabricated body and a preparation method thereof, comprising: based on the buffer layer, fixedly connecting the first carbon cloth layer, the continuous fiber layer and the first mesh tire layer to obtain a discontinuous layer; based on the discontinuous layer , the multi-layer second carbon cloth layer and the multi-layer second net tire layer are fixedly connected to obtain a continuous layer; the multi-layer discontinuous layer and the multi-layer continuous layer are fixed on the surface of the buffer layer; the buffer layer is removed to obtain a carbon carbon Prefabricated body; wherein, the first carbon cloth layer is in contact with the buffer layer, one continuous layer is arranged between two adjacent discontinuous layers, and the second carbon cloth layer in the continuous layer and the first net tire layer in the discontinuous layer touch. In the present invention, the carbon-carbon prefabricated body is prepared by alternately arranging multi-layer discontinuous layers and continuous layers on the buffer layer on the mold, which reduces the joints between carbon fiber cloth and carbon fiber mesh tires, and improves the mechanical properties of the carbon-carbon prefabricated body. performance, and at the same time, the tension in the continuous layers is released, further improving the mechanical properties of the carbon-carbon preform.

Description

technical field [0001] The invention relates to the technical field of composite material prefabricated body preparation, in particular to a carbon-carbon prefabricated body and a preparation method thereof. Background technique [0002] With the continuous consumption of traditional energy and its negative impact on the environment, monocrystalline silicon wafers, as a basic material for photovoltaic power generation, have a wide market demand. When using single crystal furnaces to draw single crystal silicon rods, The crucible side in the single crystal furnace needs to have certain mechanical properties, and at the same time, it must be able to withstand the high temperature, cold and heat cycle and corrosive environment in the furnace. [0003] At present, carbon-carbon composite materials with high strength, high thermal conductivity, low expansion coefficient, and good thermal shock resistance are often used as materials for making crucible sides, and the overall perfo...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the carbon-carbon prefabricated body prepared by continuous lamination, because the tension force of the composite cloth cannot be released after continuous needle punching, the carbon-carbon prefabricated body appears "dragon ridge" and "bulge". And "delamination" and other defects, which will reduce the mechanical properties of carbon-carbon prefabricated body

However, the carbon-carbon prefabricated body is prepared by discontinuous plies, and the mechanical properties of the carbon-carbon prefabricated body are reduced due to the large number of joints between the carbon fiber cloth and the carbon fiber mesh tire.

Images