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Preparation process for high impact toughness carbon-copper composite material

A composite material and preparation technology, applied in the field of composite materials, can solve the problems of aggravated pantograph and wire wear, pantograph-catenary contact interface lubrication failure, etc., achieve enhanced interlocking effect, improve copper-carbon interface bonding force, and improve impact The effect of toughness

Inactive Publication Date: 2014-12-10
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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Problems solved by technology

As a result, the lubrication failure of the pantograph-catenary contact interface will aggravate the wear of the pantograph and wires

Method used

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Embodiment Construction

[0026] The interfacial effect of composite materials is a characteristic that any single material does not have, and it plays an important role in composite materials. The interface effect is not only related to the interface binding state, morphology and physical and chemical properties, but also closely related to the wettability, compatibility and diffusivity of the components of the composite material. The wettability between copper and carbon is poor, no chemical reaction occurs, and the connection is purely mechanical. The rougher the connection surface is, the stronger the interlocking effect is, and the more effective the mechanical bonding is. In order to enhance the bonding force of the copper-carbon interface, the present invention designs an interface bonding layer that connects the copper-carbon interface with carbon fibers and copper fibers. The key process is to first granulate the uniformly mixed phenolic resin colloidal graphite powder, chopped carbon fiber an...

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Abstract

The invention discloses a preparation process for a high impact toughness carbon-copper composite material. The preparation process comprises the following steps: weighing graphite powder, phenolic resin, carbon fibers, copper fibers and other lubricating components according to the proportions and adding alcohol for mixing; removing alcohol solvent out of a pot and drying, and then powdering to obtain colloidal graphite powder; granulating the colloidal graphite powder and placing the colloidal graphite powder into a twin-cone mixer to obtain granulated graphite particles with burred structures; weighing the burred granulated graphite particles and copper powder according to the requirement on the proportions of all components in final products, adding a release agent and mixing for 1-3 hours to obtain press powder; finally, pressing and forming, and sintering to obtain the high impact toughness carbon-copper composite material. According to the preparation process disclosed by the invention, the surface roughness of the graphite particles can be remarkably increased, so that the interlocking action of a copper-carbon interface is enhanced, and further the binding force of the copper-carbon interface is improved, and finally the impact toughness of the copper-carbon composite material is improved.

Description

technical field [0001] The invention relates to the preparation of composite materials, in particular to a preparation process of a carbon-copper composite material with high impact toughness. The composite material is mainly used for pantograph slide plates of electric locomotives and belongs to the technical field of composite materials. [0002] Background technique [0003] Copper / graphite composite material not only has the high electrical conductivity, high strength and good ductility of copper, but also has the characteristics of good lubricity, corrosion resistance, low expansion coefficient and small specific gravity of graphite, so it has good electrical conductivity, thermal conductivity, Wear-resistant, arc-resistant and anti-welding properties, widely used in various welding electrodes, contacts of electrical engineering switches, collector rings of generators, motor brushes and pantograph slides of electric locomotives. [0004] When preparing copper / graphite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/14C22C47/02C22C101/10C22C121/00
Inventor 李春林李静雯陈建赵勇刘成东
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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