Verfahren zur Herstellung einer kohlenfaserverstärkte Wabenstruktur

摘要

A method for preparing a carbon honeycomb structure comprises the steps of alternately stacking a plurality of corrugated sheets, each of which is produced by corrugating a supporting base of carbon fibers impregnated with an epoxy resin prepolymer and then curing the prepolymer, and a plurality of flat sheets, each of which is prepared by curing a supporting base of carbon fibers impregnated with an epoxy resin prepolymer, through a node bond adhesive; curing the adhesive to form a honeycomb structure; dipping the resulting honeycomb structure in a phenolic resin prepolymer solution; evaporating the solvent; then curing the phenolic resin prepolymer; repeating these dip, evaporation and curing processes to coat the honeycomb structure with a predetermined amount of the phenolic resin; and cutting the coated honeycomb structure to a predetermined thickness. The method permits the use of a dipping solution having a high concentration and as a result, the number of steps required for dipping may substantially be reduced. Moreover, the dipping solution is never repelled even if the dipping steps are repeatedly carried out. In addition, only a small quantity of burrs are formed when cutting the honeycomb structure. The honeycomb structure shows only slight reduction in the strength under high humidity conditions.