Method for promoting electrical conduction between a metal part and a composite material

By coating the surface of composite materials with conductive ink or paint, a conductive layer is formed using conductive particles, which solves the problem of poor conductivity of composite materials, achieves low-cost and high-efficiency electrical connection, and simplifies the installation process.

CN122276159APending Publication Date: 2026-06-26THE BOEING CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE BOEING CO
Filing Date
2017-09-12
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The composite materials used in modern aircraft, such as carbon fiber reinforced polymer (CFRP), have poor electrical conductivity, leading to arcing and sparking problems. Existing solutions, such as sleeve fasteners, are expensive and complex to install, liquid metals are prone to forming brittle compounds, and conductive paints are not very effective.

Method used

The composite material is coated with conductive ink or paint, and conductive particles such as copper or silver are used to form a conductive layer on the surface of the composite material through a low-temperature sintering agent. Combined with screen printing and other technologies, the electrical connection between the metal parts and the composite material is achieved.

Benefits of technology

It achieves improved electrical conductivity between metal parts and composite materials at low cost and low weight, avoids electric arcs and sparks, simplifies the installation process, and reduces cost and time requirements.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to a method for promoting electrical conductivity between metal parts and composite materials. A composite is coated with an adhesive layer comprising a conductive material, and when the metal parts are attached to the composite, the metal parts are electrically connected to the conductive material of the adhesive layer. The adhesive layer is deposited inside pores in the composite, and / or along the edges of the pores, and / or deposited on a portion of the surface of the composite. The composite is a structure of an aircraft or other vehicle composed of a composite material formed from carbon fiber reinforced polymer (CFRP), the metal parts being fasteners or placed at the interface between the fasteners and the composite, and the electrical connection is fabricated as part of a lightning protection system, an electromagnetic effect (EME) management system, or a grounding system.
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