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Metal-graphene composite product and preparation method thereof

A graphene composite, composite product technology, applied in metal processing equipment, transportation and packaging, contacts, etc., can solve the problems of composite material hardness and density limitations, high wear rate of Ag-graphite components, low adhesion, etc.

Active Publication Date: 2020-12-25
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hardness and density of such composites would be limited due to the low adhesion of the carbon surface to the Ag matrix.
This results in a high wear rate of the Ag-graphite components and generates a large amount of particles

Method used

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  • Metal-graphene composite product and preparation method thereof
  • Metal-graphene composite product and preparation method thereof
  • Metal-graphene composite product and preparation method thereof

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Embodiment Construction

[0026] Embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments are shown. However, other embodiments in many different forms are possible within the scope of this disclosure. Rather, the following embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like numbers refer to like elements throughout the specification.

[0027] While silver is preferred and used as an example of a base metal for the metal-graphene composites discussed herein, any other suitable conductive metal or combination thereof, such as Al or Cu, may alternatively be used.

[0028] When discussing graphene flakes such as NSs herein, it is understood that at least some of the graphene in the flakes is in the form of GO unless otherwise stated. Graphene flakes as well as rGO usually contain a mixture of G and GO.

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Abstract

The present disclosure relates to a metal-graphene composite product in the form of a sliding contact for electrical applications, in which graphene flakes are dispersed in a matrix of metal, and a method of obtaining such a composite product.

Description

technical field [0001] The present disclosure relates to a metal composite material for a sliding contact of a power switch. Background technique [0002] Silver (Ag) based contact materials are commonly used in various power switching devices where low loss and lifetime stable contact performance are critical. Due to its electrical properties, Ag is used as a base material in arc and sliding contact systems. However, the mechanical and tribological properties of Ag are not impressive. It is soft and easily wraps around the dual face. For sliding contacts, this usually means high wear rates and high friction. [0003] When Ag is used in a sliding contact configuration against a copper (Cu) or Ag dual face, a large amount of Ag must be added to the contact in consideration of wear. Ag coating onto the dual surface will essentially create Ag-Ag contacts. In a lubricant-free environment, such contacts have a coefficient of friction (COF) as high as 1.5 or higher. In a mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C32/00C22C26/00H01H1/023H01H11/04H01H1/025B22F1/054B22F1/0545B22F1/10B22F1/12
CPCC22C26/00B22F2998/10H01H1/027H01H1/0237H01H1/021H01H11/048H01H2300/036B22F1/0545B22F1/054B22F1/10B22F1/12B22F3/10B22F3/02H01H1/023H01H1/025B22F9/24B82Y30/00B22F3/16B22F2302/40
Inventor A·安德松M·塔希尔L·塔希尔沙姆西H·格伦贝里U·扬松M·瓦赫兰德尔
Owner HITACHI ENERGY SWITZERLAND AG