Preparation method of C/C composite tube of optical telescope

Abstract

The invention discloses a preparation method of a C / C composite tube of an optical telescope. The method comprises the following steps: 1) carbon fiber fabrics and carbon fiber felts are spread layer by layer, needle-punching is performed on each layer to prepare a preformed reinforcement body, the density of the preformed reinforcement body is estimated before layer spreading and the radial density of the preformed reinforcement body is calculated according to the estimation result; 2) composite densifying is performed; 3) high temperature treatment is performed; and 4) the subsequent treatment is performed. The densifying process comprises the following steps: 201) performing gas-phase carbon-settling densifying treatment, namely using a gas-phase carbon-settling device to perform gas-phase carbon-settling treatment; and 202) performing resin impregnation, curing and carbonization treatment, namely performing further densifying treatment on the preformed reinforcement body after thegas-phase carbon-settling densifying treatment. The method has reasonable design, simple processing steps, low input cost, simpleness in operation and convenience in quality control; and the processed C / C composite tube has good performance, higher overall strength and stability and an ultralow thermal expansion coefficient.

Description

technical field [0001] The invention belongs to the technical field of C / C composite material processing and manufacturing, and in particular relates to a method for manufacturing an optical telescope C / C composite material lens barrel. Background technique [0002] C / C composite material is a general type of synthetic pure carbon material reinforced by carbon fiber. It has light weight, good thermal shock resistance, low thermal expansion coefficient, high high temperature strength retention rate, high resistance A series of outstanding features such as impact and high rigidity are especially suitable for use in environments that require materials to have high physical and chemical stability at extreme temperatures. They have been successfully used in spacecraft nose cones, wing leading edges, and solid motors. Important fields such as throat liners, expansion sections and aircraft brake discs are widely used. Since the 1980s, with the successful research and development o...

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Problems solved by technology

[0007] Due to the late start in my country, the application of composite materials for optical telescopes is still in the exploratory stage, mainly focusing on basic theory or small sample test research, and there is a certain gap in engineering applications

Invention patent application 200910309234.3 published on April 21, 2010 disclosed a method for forming a fiber-reinforced resin-based composite sunshade with an inner grid, and utility model patent 200920313962.7 published on August 18, 2010 disclosed A fiber-reinforced resin-based composite material hood with an inner grid. The above two patent application documents introduce the use of carbon fiber-reinforced resin-based composite materials to manufacture the space remote sensing camera multi-spectral scanner hood, but its application site and material The systems are quite different from the structural parts of the optical telescope, and there is no report on the manufacturing method of the C / C composite lens barrel structure of the moon-based optical telescope.

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