Microwave curing formation method for carbon fiber/epoxy resin composite materials and laminated plate made of composite materials

Abstract

The invention provides a microwave curing formation method for a laminated plate made of carbon fiber / epoxy resin composite materials. The microwave curing formation method for the laminated plate made of the carbon fiber / epoxy resin composite materials comprises the steps that a laid carbon fiber / epoxy resin prepreg laminated plate is placed in a vacuum bag, the upper / lower surface of the laminated plate is isolated from the inner wall of the vacuum bag through a plate mold, and the interior of the vacuum bag is vacuumized, so that the laminated plate is compacted by means of external atmospheric pressure; and then under the condition that the vacuum degree in the vacuum bag is maintained, microwave curing formation is conducted under at least one stepwise-increasing power, wherein the microwave frequency range is 2.25-2.65 GHz, the microwave power range is 40-400 W, and the total microwave radiation time is 50-100 min. In this way, the obtained microwave curing-formed carbon fiber / epoxy resin laminated plate has the characteristics of being smooth in surface and good in forming quality; and meanwhile, compared with a traditional thermocuring method, the cycle of the curing process is obviously shortened while uniform and complete curing is guaranteed, and approximate or higher glass-transition temperature and compression strength are achieved.

Description

technical field [0001] The invention relates to a microwave curing forming method of carbon fiber / epoxy resin composite materials, in particular to a vacuum bag pressure microwave curing forming method of carbon fiber / epoxy prepreg laminates, and the carbon fiber / epoxy resin obtained by this method Resin composite laminate. Background technique [0002] Carbon fiber reinforced epoxy resin-based composite materials have the advantages of high specific strength, high specific stiffness, corrosion resistance, fatigue resistance, vibration reduction and dimensional stability, and are widely used in aerospace, transportation, wind power generation, marine shipbuilding and other industrial fields. Attention and large-scale application. [0003] Generally, the curing of carbon fiber / epoxy composites (such as carbon fiber / epoxy resin prepreg laminates) adopts traditional heat curing methods. However, this thermosetting forming method has problems such as slow heat transfer rate, l...

AI Technical Summary

Problems solved by technology

The patent whose publication number is CN102729490, the patent whose publication number is CN103057013 and the patent whose publication number is CN103192536 all relate to the processing device and method of microwave-cured fiber-reinforced resin-based composite materials. In the past, microwave curing was used to replace traditional heating curing, and their focus was on devices and methods, and they did not target specific composite material systems, nor did they mention specific process parameters in the forming process, such as microwave power, radiation time, etc.

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