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Electric contact material and preparation method thereof

A technology of electrical contact material and copper alloy, which is applied in the direction of contacts, circuits, electric switches, etc., can solve the problems of reducing the conductivity of materials, reduce agglomeration, improve corrosion resistance and welding resistance, and avoid oxidation Effect

Active Publication Date: 2016-04-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By adding an appropriate amount of boron, tin and antimony powder, the strength and wear resistance of the finished electrical contact can be improved, but the electrical conductivity of the material is reduced to a certain extent

Method used

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  • Electric contact material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Nickel-coated graphene powder was prepared by depositing metallic nickel on the surface of graphene (1-10 layers) by DC magnetron sputtering. The nickel target with a purity of 99.99% is first polished with fine sandpaper to remove the surface oxide film before installation, then cleaned with acetone and dried. Pre-sputtering is carried out for 5 minutes before DC magnetron sputtering deposition to remove metal oxides and other impurities on the target surface to ensure the purity of the nickel film deposited on the subsequent graphene surface. The sputtering parameters are as follows: the vacuum degree reaches 0.1*10 -3 At Pa, high-purity argon gas was introduced, the vacuum chamber pressure was 0.5 Pa, the sputtering power was 100 W, and the deposition time was 30 min.

[0021] (2) The alloy powder containing 0.15% bismuth, 0.1% zinc and 99.75% copper is made into 200 mesh copper alloy powder by gas atomization method.

[0022] (3) Nickel-plated graphene and cop...

Embodiment 2

[0026] (1) Use DC magnetron sputtering method to deposit metallic nickel on the surface of graphene (1-5 layers) to prepare nickel-coated graphene powder. The nickel target with a purity of 99.99% is ground and removed with fine sandpaper before installation. The oxide film was cleaned with acetone, dried, and pre-sputtered for 5 minutes before DC magnetron sputtering deposition to remove metal oxides and other impurities on the target surface to ensure the purity of the nickel film deposited on the subsequent graphene surface. The sputtering parameters are as follows: when the vacuum reaches 1.0×10-3Pa, high-purity argon gas is introduced, the vacuum chamber pressure is 1.2Pa, the sputtering power is 150W, and the deposition time is 10min.

[0027] (2) The alloy powder containing 0.5% bismuth, 3.0% zinc and 96.5% copper is made into 300 mesh copper alloy powder by gas atomization method.

[0028] (3) Nickel-plated graphene and copper-0.5% bismuth-3.0% zinc alloy powder are lo...

Embodiment 3

[0032] (1) Nickel-coated graphene was prepared by depositing metallic nickel on the surface of graphene (1-10 layers) by DC magnetron sputtering. The target with a purity of 99.99% is ground with fine sandpaper to remove the surface oxide film before installation, then cleaned with acetone and dried. Pre-sputtering is carried out for 5 minutes before DC magnetron sputtering deposition to remove metal oxides and other impurities on the target surface to ensure the purity of the nickel film deposited on the subsequent graphene surface. The sputtering parameters are as follows: the vacuum degree reaches 0.5*10 -3 At Pa, high-purity argon gas was introduced, the vacuum chamber pressure was 1.0 Pa, the sputtering power was 140 W, and the deposition time was 15 min.

[0033] (2) The alloy powder containing 0.2% bismuth, 3.0% aluminum and 96.8% copper is made into 200 mesh copper alloy powder by gas atomization method.

[0034] (3) Put nickel-plated graphene: copper-0.2% bismuth-3....

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Abstract

The invention relates to an electric contact material, in particular to a graphene reinforced copper-matrix electric contact composite material and a preparation method of the material. The electric contact material consists of the following components in percentage by weight: 0.1-1.0% of nickelized graphene and 99.0-99.9% of copper alloy. The preparation method comprises the steps of graphene nickelizing, copper alloy pulverizing, ball-milling and powder mixing, densification processing and vacuum electric arc smelting. According to the electric contact material disclosed by the invention, the nickelized graphene is added in the copper alloy and serves as the framework, so that the material has high hardness, mechanical impact-resistance and electric arc ablation resistance; and the lowering of the electric conductivity and the heat conductivity is avoided. Vacuum electric arc smelting is adopted, so that the smelting time is short; segregation of graphene particles is avoided; and the oxidation of the copper matrix is effectively prevented.

Description

technical field [0001] The invention relates to an electric contact material and a preparation method thereof, in particular to a graphene-reinforced copper-based electric contact composite material and a preparation method thereof. Background technique [0002] The vacuum contact material is an important factor affecting the breaking performance of the vacuum switch. The contact material is required to have high electrical conductivity, high thermal conductivity, high mechanical strength and low contact resistance. The vacuum switch does not need to be overhauled, and the contacts need to withstand at least 8-12 times, and the rated short-circuit current of 30-50 times will burn the contacts, so the contact material should have good arc resistance and melting resistance. Solderability. Currently commonly used copper-bismuth alloy has good welding resistance, low current carrying value, and certain breaking capacity, but its strength is low, and the arc erosion is large, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C9/04C22C9/02C22C9/01C22C9/06C22C1/10H01H1/025
CPCH01H1/025C22C1/101C22C1/1036C22C1/1084C22C9/00C22C9/01C22C9/02C22C9/04C22C9/06C22C32/0084C22C1/1047
Inventor 冷金凤刘易李晨雪滕新营耿浩然
Owner UNIV OF JINAN
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