Copper-coated-with-silver graphene composite rivet contact and preparation method therefor

A silver-graphite, contact technology, applied in the direction of contacts, electrical components, electrical switches, etc., can solve problems such as upper damage, and achieve the effects of high electrical life, simple method and obvious electrical performance

Inactive Publication Date: 2015-12-23
SHANGHAI HIWAVE COMPOSITE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-composite rivet contact not only improves the comprehensive performance of the rivet, but also reduces the production cost, but the composite layer in this invention is AgCdO 10 , cadmium will cause great harm to the human body or the environment

Method used

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  • Copper-coated-with-silver graphene composite rivet contact and preparation method therefor
  • Copper-coated-with-silver graphene composite rivet contact and preparation method therefor
  • Copper-coated-with-silver graphene composite rivet contact and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The steps for preparing the AgGR / Cu double composite rivet contact in Example 1 are as follows:

[0047] Ⅰ) Material composition of silver graphene filaments

[0048]The material components of the silver graphene wire are mainly metallic silver and graphene, wherein the content of graphene is 0.5wt%-5wt%. Of course, in other embodiments, specific material components of the silver graphene filament can also be selected according to actual needs, and are not limited to those listed in the embodiments of the present invention.

[0049] Ⅱ) Steps for preparing AgGR / Cu double composite rivet contacts

[0050] 1) After the silver graphene powder was prepared by the chemical reduction method, the silver graphene wire with a diameter of 4mm was prepared by powder metallurgy and hot extrusion technology; the performance test of the obtained wire was found to have a resistivity of 1.53Ω· m×10 -8 ;The density is 10.31g / cm 3 ; Tensile strength of 190MPa; elongation of 42%.

[0...

Embodiment 2

[0054] The main difference from Example 1 is that this Example 2 increases the thickness of the silver-graphene composite layer.

[0055] The basic steps for preparing AgGR / Cu double composite rivet contacts in Example 2 are as follows:

[0056] Ⅰ) Material composition of silver graphene filaments

[0057] The material composition of the silver graphene filament is mainly metallic silver and graphene, wherein metallic silver accounts for 98wt%; graphene accounts for 2wt%.

[0058] Ⅱ) Steps for preparing AgGR / Cu double composite rivet contacts

[0059] 1) After the silver graphene powder was prepared by the chemical reduction method, the silver graphene wire with a diameter of 4mm was prepared by powder metallurgy and hot extrusion technology; the performance test of the obtained wire was found to have a resistivity of 1.53Ω· m×10 -8 ;The density is 10.31g / cm 3 ; Tensile strength of 190MPa; elongation of 42%.

[0060] 2) The silver graphene filament is placed in a hydrogen...

Embodiment 3

[0066] The steps for preparing the AgGR / Cu / AgGR three-composite rivet contact in Example 3 are as follows:

[0067] 1) After the silver graphene powder was prepared by the chemical reduction method, the silver graphene wire with a diameter of 4mm was prepared by powder metallurgy and hot extrusion technology; the performance test of the obtained wire was found to have a resistivity of 1.53Ω· m×10 -8 ;The density is 10.31g / cm 3 ; Tensile strength of 190MPa; elongation of 42%.

[0068] 2) The silver graphene filament is placed in a hydrogen environment, and annealed at 500° C. for 3 hours. Using a wire drawing machine, the silver graphene wire with a diameter of 4 mm is drawn into a silver graphene wire with a diameter of 2.5 mm.

[0069] 3) Using a three-composite rivet machine, the AgGR / Cu / AgGR three-composite rivet contact is prepared by compounding the silver graphene wire and the copper wire. The thickness of the silver-graphene composite layer on the upper surface of th...

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Abstract

The invention provides a copper-coated-with-silver graphene composite rivet contact and a preparation method therefor. The contact comprises a main body, and the head part and/or tail part of the main body are/is provided with a silver graphene composite layer. Silver graphene is used for a covering material of the head part or tail part of a rivet, and the prepared contact is good in conductivity, is high in hardness, and is long in service life. Meanwhile, the method is simple, is good in technological controllability, is easy to achieve scale production, is uniform in material organization, and is stable in performance.

Description

technical field [0001] The invention belongs to the field of electrical devices, specifically, a copper-coated silver-coated graphene composite rivet contact and a preparation method thereof, such as a copper-coated silver-coated graphene double-composite rivet contact (AgGR / Cu), a triple-composite rivet contact (AgGR / Cu / AgGR). Background technique [0002] In low-voltage electrical appliances, silver-based composite materials are currently the most widely used electrical contact materials. In order to save silver resources and reduce the cost of enterprises, some enterprises began to use double-composite rivet contacts and triple-compound rivet contacts. However, due to the limitations of the performance of silver and its alloys, copper-clad silver rivet contacts still have many deficiencies. At present, the main cladding materials used are silver-nickel, silver / tin oxide, etc. The addition of alloying element nickel or reinforcement tin oxide reduces the conductivity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/025H01H1/027H01H11/04
CPCH01H1/025H01H1/027H01H11/048
Inventor 陈乐生王鹏鹏刘伟利
Owner SHANGHAI HIWAVE COMPOSITE MATERIALS CO LTD
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