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

An electrical contact material, copper-plated graphene technology, applied in the direction of metal material coating process, contacts, circuits, etc., can solve the problem of difficulty in obtaining comprehensive performance copper-based contact materials, and reduce the electrical and thermal conductivity of copper contact materials. and other problems to achieve the effect of improving interface wettability, good wear resistance and high wear resistance

Active Publication Date: 2018-05-25
UNIV OF JINAN
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  • Summary
  • 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/copper-based electrical contact material and preparation method thereof

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Effect test

Embodiment 1

[0034] (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% is 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 to remove the metal oxide on the target surface substances and other impurities to ensure 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.

[0035] (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 lanthanum-rich mixe...

Embodiment 2

[0040] (1) Metal copper is deposited on the surface of graphene (number of layers 1-10) by DC magnetron sputtering to make copper-coated graphene. The copper target with a purity of 99.99% is 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 to remove the metal oxide on the target surface substances and other impurities to ensure 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 -3 At 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.

[0041] (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 rare earth metal, ...

Embodiment 3

[0046] (1) Metal copper is deposited on the surface of graphene (number of layers 1-10) by DC magnetron sputtering to make copper-coated graphene. The copper target with a purity of 99.99% is 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 to remove the metal oxide on the target surface substances and other impurities to ensure 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 At Pa, argon gas with a purity of 99.99% was introduced, the working pressure was 0.8Pa, the sputtering power was 120W, and the deposition time was 15min.

[0047] (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 lanthanum-rich mixed rare earth meta...

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Abstract

The invention relates to a copper-plated graphene / copper-based electrical contact material and a preparation method thereof. The electrical contact material comprises the following components in percentage by weight: 0.1-2.0% of copper-plated graphene, and 98.0-99.9% of copper-rare earth alloy, wherein the weight ratio of rare earth to the copper-rare earth alloy is 0.03-3.0%. The preparation method comprises the following steps: plating copper on graphene, pulverizing to produce powder, ball-mixing and mixing powder, cold pressing and forming, and performing electric arc melting in vacuum. According to the invention, a copper-plated graphene reinforcing body as a framework is added into the copper alloy; therefore, the material has high hardness, abrasive resistance, mechanical shock resistance and melting-welding resistance; and, due to addition of the rare earth, the oxidation resistance and the electric arc erosion resistance 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 / 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 patent docum...

Claims

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Application Information

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IPC IPC(8): H01H1/025H01H11/04C22C9/00C22C1/10C23C14/18C23C14/35
CPCC22C1/101C22C9/00C23C14/185C23C14/35H01H1/025H01H11/048
Inventor 冷金凤邵月文王润龙赵德刚王艳
Owner UNIV OF JINAN
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