A kind of copper-coated graphene-reinforced copper-based electrical contact material and preparation method thereof

A technology of electrical contact materials and copper-coated graphene, which is applied in the direction of cable/conductor manufacturing, equipment for manufacturing conductive/semiconductive layers, circuits, etc., can solve the problem of reducing the electrical and thermal conductivity of copper contact materials, and the difficulty in obtaining Comprehensive performance of copper-based contact materials and other issues, to achieve the effect suitable for large-scale mass production, high hardness, high comprehensive performance

Active Publication Date: 2017-08-25
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Both of the above two patents improve the corrosion resistance and oxidation resistance of copper alloys by adding rare earth or rare earth oxides, but at the same time, due to the addition of low-conductivity materials such as ceramic particles and chromium, the copper contacts are reduced to a certain extent. The electrical and thermal conductivity of the material makes it difficult to obtain a copper-based contact material with excellent comprehensive properties

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  • A kind of copper-coated graphene-reinforced copper-based electrical contact material and preparation method thereof

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Effect test

Embodiment 1

[0035] (1) Copper-coated graphene was prepared by depositing metallic copper on the surface of graphene (number of layers 1-10) by DC magnetron sputtering. The copper target with a purity of 99.99% was first ground with fine sandpaper to remove the surface oxide film before installation, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering. Graphene separates, removes metal oxides and other impurities on the target surface, and ensures the purity of the copper film deposited on the subsequent graphene surface. The process parameters of DC magnetron sputtering are: when the vacuum degree reaches 0.1*10 -3 At Pa, argon gas with a purity of 99.99% was introduced, the working pressure was 0.5Pa, the sputtering power was 100W, and the deposition time was 30min.

[0036] (2) The copper-rare earth alloy is made into 200-mesh alloy powder by centrifugal atomization method, the rare earth in the copper-rare earth is cerium-ric...

Embodiment 2

[0041] (1) Copper-coated graphene was prepared by depositing metallic copper on the surface of graphene (number of layers 1-10) by DC magnetron sputtering. The copper target with a purity of 99.99% was first ground with fine sandpaper to remove the surface oxide film before installation, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering. Graphene separates, removes metal oxides and other impurities on the target surface, and ensures the purity of the copper film deposited on the subsequent graphene surface. The process parameters of DC magnetron sputtering are: when the vacuum degree reaches 1*10 -3At Pa, argon gas with a purity of 99.99% was introduced, the working pressure was 1.2Pa, the sputtering power was 150W, and the deposition time was 5min.

[0042] (2) The copper-rare earth alloy is made into 300-mesh alloy powder by ultrasonic atomization. The rare earth in the copper-rare earth is lanthanum-rich mixed ra...

Embodiment 3

[0047] (1) Copper-coated graphene was prepared by depositing metallic copper on the surface of graphene (number of layers 1-10) by DC magnetron sputtering. The copper target with a purity of 99.99% was first ground with fine sandpaper to remove the surface oxide film before installation, then cleaned with acetone, dried, and pre-sputtered for 5 minutes before deposition by DC magnetron sputtering. Graphene separates, removes metal oxides and other impurities on the target surface, and ensures the purity of the copper film deposited on the subsequent graphene surface. The process parameters of DC magnetron sputtering are: when the vacuum degree reaches 0.3*10-3 Pa, argon gas with a purity of 99.99% is introduced, the working pressure is 0.8Pa, the sputtering power is 120W, and the deposition time is 5min.

[0048] (2) The copper-rare earth alloy is made into 200-mesh alloy powder by gas atomization method, the rare earth in the copper-rare earth is cerium-rich mixed rare earth ...

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Abstract

The invention relates to a copper-plated graphene reinforced copper-based electrical contact material and a preparation method thereof. The electrical contact material comprises 0.1-5.0 wt% of copper-plated graphene and 95.0-99.9 wt% of copper-rare earth alloy, and the weight ratio of rare earth in the copper-rare earth alloy accounts for 0.03-2.0%. The preparation method comprises the following steps of graphene copper plating, atomization for powder making, ball milling and power mixing, cold-press forming, sintering, secondary forming and sintering. A copper-plated graphene reinforced body is added into the copper alloy and taken as a framework, so that the material has the advantages of high hardness, high wear resistance, mechanical impact resistant performance and welding resistance; and with the addition of the rare earth, the oxidation resistance and the arc burning resistant capability of the copper alloy electrical contact material are improved.

Description

technical field [0001] The invention relates to an electrical contact material, in particular to a copper-coated graphene-reinforced copper-based electrical contact material, and a preparation method of the above-mentioned material. Background technique [0002] Electrical contact materials are key components of instruments and meters, and play an important role in the life and reliability of instruments and meters. Copper-based contact materials have partially replaced silver-based contacts in recent years due to their low price, electrical conductivity, and thermal conductivity similar to silver, reducing the loss of precious metal silver. However, because the copper contact material is easily oxidized, copper oxide and cuprous oxide with low resistivity are produced, which increases the contact resistance of the contact element and makes it easy to heat up during use, resulting in the reliability of the contact material. and reduced service life. [0003] The existing p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/02H01B1/06H01B13/00H01R13/02H01R13/03
CPCH01B1/02H01B1/06H01B13/0026H01R13/02H01R13/03
Inventor 冷金凤周庆波法源王子钦
Owner UNIV OF JINAN
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