Carbon fiber preform, method for manufacturing the same, carbon ceramic brake disc, and vehicle

By arranging carbon fiber bundles in a Z-shape and alternating layers of carbon fiber bundles, the problem of insufficient strength in non-major directions of existing carbon fiber preforms is solved, and carbon ceramic brake discs with high interlayer shear strength and tensile strength are achieved.

CN122105741APending Publication Date: 2026-05-29BYD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BYD CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing carbon fiber preforms with alternating 0° and 90° unidirectional fabrics exhibit high radial and weft strength, but insufficient strength in other directions, resulting in low interlaminar shear and tensile properties.

Method used

The carbon fiber bundles are arranged in a Z-shape, and the angle between adjacent carbon fiber bundles is limited by alternating layers of carbon fiber bundles and mesh layers to form multiple carbon fiber bundle groups, which enhances the fiber bundles to pass through the interface and perform needle-punching connection.

Benefits of technology

This improved the interlaminar shear strength and tensile strength of the carbon fiber preform, achieved isotropy, reduced chemical vapor infiltration time, lowered costs, and maintained other physicochemical properties.

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Abstract

The present disclosure relates to a carbon fiber prepreg, a preparation method thereof, a carbon ceramic brake disc, and a vehicle, the carbon fiber prepreg comprising a plurality of carbon fiber bundle layers and net tire layers arranged alternately in layers; at least one of the carbon fiber bundle layers comprises one or more carbon fiber bundle groups, each of the carbon fiber bundle groups comprises a plurality of carbon fiber bundle segments arranged in a zigzag manner, and the included angle a between any two adjacent carbon fiber bundle segments is an acute angle. The carbon ceramic brake disc prepared by using the carbon fiber prepreg has high interlaminar shear strength and tensile strength.
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