48results about How to "Improved interlaminar shear performance" patented technology

The invention discloses a grid stacking structure capable of optimizing the performances of a composite material laminated plate and a production method. The stacking structure is characterized by being composed of a plurality of perpendicular longitudinal prepreg strips and transversal prepreg strips in a crossing manner, wherein the length of the stacking structure is 2<m>-1 times of the width of rectangular strips, the width of the stacking structure is 2<n>-1 times of the width of the rectangular strips, and m and n are natural numbers. According to the stacking structure and the production method disclosed by the invention, the feature of structure designability of composite materials is ingeniously utilized, and a reasonable stacking design is carried out in a new stacking manner, so as to design a structure which is approximately three-dimensionally weaved, and on the premise of using the same prepreg, the tensile strength, flexural strength, shear strength and the like of the stacking structure can be obviously improved compared with the existing stacking structure after being subjected to curing formation; and the tensile, flexural and interlayer shear performances of the laminated plate obtained in the weaving manner are improved to a certain extent relative to conventional laminated plates, thus achieving great promotion significance on development of a three-dimensional enhancement technology for the composite materials.

The invention discloses a carbon-silicon carbide double-ingredient substrate carbon fiber composite material as well as a preparation method and application thereof. The method comprises the followingsteps of (1) performing weaving and high-temperature heat treatment on a carbon fiber prefabricated body; (2) preparing a porous carbon / carbon blank body; (3) introducing carbon elements and siliconelements into the carbon / carbon blank body in an impregnating mode; after the soaking and pyrolysis circulation period, obtaining a Cf / Cm-Sim porous intermediate; (4) performing embedded fusion Si seeping on the Cf / Cm-Sim porous intermediate to obtain a Cf / Cm-SiCm composite material. The inside SiC distribution of the composite is uniform; the residue Si content is 1.2 to 3.3 percent; the bendingintensity is 236 to 275MPa; the compression intensity is 322 to 364MPa; the dynamic friction coefficient is 0.32 to 0.48; the mechanical / friction performance is excellent; the thermal stability and the environment applicability are high; the material is applicable to the manufacturing of automobile braking discs / sheets.

The invention relates to a carbon fiber composite material with interlayer shear performance and a preparation method thereof. The composite material includes carbon fibers, an epoxy resin matrix material and micro-nano materials dispersed in the epoxy resin matrix material in an orientation; the micro-nano materials are Refers to graphene oxide surface modified with magnetic nanoparticles. The invention uses graphene oxide modified by magnetic field orientation magnetic particles to enhance the interlayer shear performance of the carbon fiber composite material, while strengthening the matrix resin, the interface between the matrix resin and the carbon fiber is combined more firmly, so that the prepared composite material has Excellent interlaminar shear properties.