A transition layer on the inner surface of a carbon fiber composite material pipe fitting and its preparation method

Abstract

The invention discloses a carbon fiber composite material pipe inner surface transition layer and a preparation method thereof, relates to a transition layer design method for directly obtaining a gold plated layer on the inner surface of a high-draw-ratio carbon fiber composite material pipe through 'transition', in particular to a preparation method for high-precision gold plated layers appliedto the inner surfaces of spacecraft satellite borne carbon fiber composite material waveguide array antennas and horn array antennas, and belongs to the technical field of surface engineering. The draw ratio of a carbon fiber composite material pipe is not smaller than 20. By designing the transition layer, the effect that the difference between the configuration forming precision of a carbon fiber composite material and the machining size precision of a metal material die is controlled to be + / -5[mu]m can be achieved, gold plated layers can be directly obtained through transition on the innersurfaces of carbon fiber composite material waveguide and horn antennas with any draw ratio and any configuration, and the gold plated layers are uniform in appearance color and high in binding forceand can bear 100 times of high and low temperature impacts at the temperature of -196-120 DEG C.

Description

technical field [0001] The invention relates to a transition layer on the inner surface of a carbon fiber composite material pipe fitting and a preparation method thereof, a design method of a transition layer for directly "transferring" a gold plating layer on the inner surface of a carbon fiber composite material pipe fitting with a high aspect ratio, in particular to a transition layer applied to a spacecraft star A method for preparing a high-precision gold coating on the inner surface of a carbon fiber composite material waveguide array antenna and a horn array antenna belongs to the technical field of surface engineering, and the aspect ratio of the carbon fiber composite material pipe fitting is not less than 20. Background technique [0002] With the development of spacecraft spaceborne phased array antennas and SAR antennas, the number of radiation array elements such as waveguides and horn antennas has increased significantly, resulting in a large overall weight of ...

AI Technical Summary

Problems solved by technology

Due to the existence of resin, carbon fiber composite materials have poor surface electrical properties and cannot meet the functional requirements of electromagnetic wave transmission. Therefore, it is necessary to prepare a metal film layer with excellent electrical properties on its inner surface.

[0005] Due to the low surface chemical activity of carbon fiber composite materials, effective chemical bonding between the metal film layer and the matrix material cannot be formed during the deposition process, so the technical difficulty of preparing metal film layers on the surface of carbon fiber composite materials is relatively large.

In addition, in order to realize the specific functional requirements of electromagnetic wave transmission, the cavity configuration of waveguide and horn antenna design is extremely complex, and the dimensional accuracy is high, which is a typical complex configuration of high aspect ratio and high precision deep cavity

When conventional chemical plating, electroplating and other processes are used, due to factors such as poor solution circulation and power line shielding, the metal film layer has poor continuity and poor bonding force, which makes it difficult to meet the technical index requirements for spacecraft model development

More importantly, the molding of carbon fiber composite waveguide and horn antenna mainly adopts the method of mold pressurization. Due to the extremely complicated inner cavity configuration, it is impossible to realize the demoulding of the mold. Therefore, the molding of carbon fiber composite material waveguide and horn antenna also has problems. great technical difficulty