Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Copper-carbon composite material and preparing method thereof

A composite material and carbon material technology, applied in the field of copper-carbon composite material and its preparation, can solve the problems of peeling, poor wettability, peeling, etc., and achieve the effects of improving interface bonding, improving comprehensive performance, and reducing porosity

Active Publication Date: 2017-02-22
CENT SOUTH UNIV
View PDF9 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper and carbon do not react even at high temperatures, and the wettability is extremely poor. The wetting angle reaches 140° at a high temperature of 1100°C. However, the existing copper / graphite materials cannot be prepared by copper / carbon Effective control of the interface continuity and interfacial bond strength seriously restricts the improvement of material strength and lubricating performance. When loaded, it often causes graphite particles to pull out, peel off and fall off.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Copper-carbon composite material and preparing method thereof
  • Copper-carbon composite material and preparing method thereof
  • Copper-carbon composite material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Choose natural flake graphite as raw material, the particle size range is 50-150μm, the thickness is 5-20μm, and the nickel plating + copper graphite powder is prepared under electromagnetic stirring according to the following steps: (1) The natural flake graphite is in 3mol / L concentrated sulfuric acid + 3mol / L concentrated nitric acid was oxidized, the temperature was 100℃, the treatment time was 2h, then washed with deionized water to neutrality and dried; (2) The graphite oxide powder was in 0.3mol / L tin dichloride solution Carry out sensitization treatment at a temperature of 20℃ and a treatment time of 30min, then wash with deionized water to neutrality and dry; (3) Activate the sensitized graphite powder in 0.2mol / L silver nitrate solution at a temperature of 20℃, treatment time is 30min, then rinse with deionized water to neutrality and dry; (4) Electroless plating of activated graphite powder in nickel sulfate solution, reducing agent is ethylenediamine, adding r...

Embodiment 2

[0033] Select carbon fiber as raw material, with a diameter range of 10-50μm and a length of 20-100μm. Prepare nickel+copper-plated carbon fiber under electromagnetic stirring according to the following steps: (1) The carbon fiber is oxidized in 3mol / L concentrated sulfuric acid + 0.5mol / L potassium chromate, the temperature is 50℃, and the treatment time is 3h. Then rinse with deionized water until it is neutral and dry; (2) sensitize the oxidized carbon fiber in a 0.3mol / L tin dichloride solution at a temperature of 20℃ and a treatment time of 30min, then use deionized water Wash to neutral and dry; (3) Activate the sensitized carbon fiber in a 0.2mol / L silver nitrate solution at a temperature of 20°C and a treatment time of 30min, then rinse with deionized water to neutral and dry; ( 4) The activated graphite powder is electrolessly plated in a nickel sulfate solution, the reducing agent is ethylenediamine, the addition rate is 2g / L, the plating temperature is 20°C, and the ...

Embodiment 3

[0035] Using nano graphite as raw material, the particle size range is 1-5μm, and the nickel-plated graphite powder is prepared under electromagnetic stirring according to the following steps: (1) Colloidal flake graphite is processed in 3mol / L concentrated sulfuric acid + 3mol / L concentrated nitric acid Oxidation treatment, the temperature is 100℃, the treatment time is 1h, then rinse with deionized water to neutrality and dry; (2) Sensitize graphite oxide powder in 0.3mol / L tin dichloride solution, temperature The temperature is 20℃, the treatment time is 30min, and then it is washed with deionized water to neutrality and dried; (3) The sensitized graphite powder is activated in a 0.2mol / L silver nitrate solution, the temperature is 20℃, and the treatment time is 30min, then wash with deionized water to neutrality and dry; (4) Electroless plating of activated graphite powder in nickel sulfate solution, reducing agent is ethylenediamine, adding rate is 2g / L, plating temperature...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a copper-carbon composite material and a preparing method thereof. Natural flake graphite, colloidal graphite, nano graphite, carbon fiber and the like can be selected as a carbon material in the copper-carbon composite material. The preparing method of the copper-carbon composite material includes the steps that firstly, a chemical nickel plating method is used for preparing a nickel plating carbon material; then a chemical copper plating method is used for plating copper on the nickel plating carbon material; and finally, vacuum semi-solid-state low-pressure sintering is conducted on the copper plating carbon material under the copper melting point temperature, and the copper-carbon composite material is prepared. The copper-carbon composite material and the preparing method thereof have the beneficial effects that a layer of even thin nickel plating layer is formed on the surface of carbon through the nickel plating method so as to reduce the wetting angle of the carbon material, the copper plating layer is formed on the surface of the nickel plating carbon material through the copper plating method so that a three-dimensional copper network can be formed by the material in the sintering process, and the bonding strength of a base body is improved through vacuum semi-solid-state low-pressure sintering. The two phases of the base body and the carbon of the copper-carbon composite material prepared through the method are distributed evenly and are well combined, and the good electricity and mechanical properties and the good frictional wear performance are achieved.

Description

Technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a copper-carbon composite material and a preparation method thereof. Background technique [0002] Copper-carbon composite material is a very promising metal matrix composite material. It not only has the good strength and hardness of copper, excellent electrical conductivity, thermal conductivity, and corrosion resistance, but also has good carbon self-lubricity, high melting point, Welding resistance and arc ablation resistance have been widely used in electrical contact materials, friction materials, oil-impregnated bearings, conductive materials and mechanical parts materials. With the rapid development of science and technology, on the one hand, the demand for copper-carbon composite materials has soared, and on the other hand, industrial upgrading puts forward higher requirements on the performance of copper-carbon composite materials. Therefore, domestic and foreign ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C23C18/40C23C18/34C23C18/18B22F3/14C22C1/04C22C1/10C22C47/04C22C47/14C22C49/14C22C101/10
CPCC22C1/04C22C1/101C22C47/04C22C47/14C22C49/14C23C18/1651C23C18/1893C23C18/34C23C18/40C23C18/405B22F3/14B22F2003/145B22F1/17
Inventor 肖柱李周龚深甘雪萍刘斯玮黄胤杰陈如丝
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products