Unlock instant, AI-driven research and patent intelligence for your innovation.

Three-dimensional network copper-copper/ graphite composite material and preparation method thereof

A three-dimensional network and composite material technology, applied in the field of three-dimensional network copper-copper/graphite composite materials and their preparation, can solve the problems affecting the comprehensive performance of composite materials, high porosity of composite materials, uneven distribution of graphite, etc. The effect of strong performance, simple and easy-to-obtain raw materials, and good mechanical properties

Inactive Publication Date: 2019-01-01
CENT SOUTH UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that graphite and copper are not wet to each other, and the density difference is large, the distribution of graphite in the copper matrix is ​​uneven, and it is easy to cause local segregation during the preparation process.
Moreover, in order to make the graphite evenly distributed in the whole semi-solid copper, the molten copper matrix will be vigorously stirred, and gas will be brought in during the stirring process, on the one hand, the copper will be oxidized, on the other hand, the prepared composite The high porosity of the material affects the comprehensive performance of the composite material

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
  • Three-dimensional network copper-copper/ graphite composite material and preparation method thereof
  • Three-dimensional network copper-copper/ graphite composite material and preparation method thereof
  • Three-dimensional network copper-copper/ graphite composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Cut the polyurethane sponge (PU) into a size of 50mm×10mm×25mm, immerse the polyurethane sponge in 100g / L NaOH aqueous solution, soak at 50°C for 10min, and wash until neutral; the alkali-washed polyurethane sponge precursor Immerse in 5g / L SnCl 2 and 0.05mol / L HCl mixed solution, sensitized at 50°C for 30min, washed with water until neutral; soaked the sensitized polyurethane sponge precursor in 0.05g / L PdCl 2 and 0.05mol / L HCl mixed solution, activated at 50°C for 30 minutes, washed with water until neutral, and the activated polyurethane sponge precursor was obtained. The activated polyurethane sponge precursor is placed in a chemical bath with a pH value of 12.5 to 13, and electroless plated at 50°C for 32 hours to obtain a three-dimensional network copper-plated / polyurethane sponge. The composition of the electroless bath is: 16g / LCuSO 4 ·5H 2 O, 19g / L EDTA-2Na, 12g / L NaKC 4 h 4 o 6 4H 2 O, 20mg / L 2,2′-bipyridine, 20mg / L K 4 Fe(CN) 6 , 13mL / L CH 2 O;...

Embodiment 2

[0051] (1) Cut the polyurethane sponge (PU) into a size of 50mm×10mm×25mm, immerse the polyurethane sponge in 100g / L NaOH aqueous solution, soak at 50°C for 10min, and wash until neutral; the alkali-washed polyurethane sponge precursor Immerse in 5g / L SnCl 2 and 0.05mol / L HCl mixed solution, sensitized at 50°C for 30min, washed with water until neutral; soaked the sensitized polyurethane sponge precursor in 0.05g / L PdCl 2 and 0.05mol / L HCl mixed solution, activated at 50°C for 30 minutes, washed with water until neutral, and the activated polyurethane sponge precursor was obtained. The activated polyurethane sponge precursor is placed in a chemical bath with a pH value of 12.5 to 13, and electroless plated at 50°C for 32 hours to obtain a three-dimensional network copper-plated / polyurethane sponge. The composition of the electroless bath is: 16g / LCuSO 4 ·5H 2 O, 19g / L EDTA-2Na, 12g / L NaKC 4 h 4 o 6 4H 2 O, 20mg / L 2,2′-bipyridine, 20mg / L K 4 Fe(CN) 6 , 13mL / LCH 2 O; ...

Embodiment 3

[0057] (1) Cut the polyurethane sponge (PU) into a size of 50mm×10mm×25mm, immerse the polyurethane sponge in 100g / L NaOH aqueous solution, soak at 50°C for 10min, and wash with water until neutral; the alkali-washed polyurethane sponge precursor Immerse in 5g / L SnCl 2 and 0.05mol / L HCl mixed solution, sensitized at 50°C for 30min, washed with water until neutral; soaked the sensitized polyurethane sponge precursor in 0.05g / L PdCl 2 and 0.05mol / L HCl mixed solution, activated at 50°C for 30 minutes, washed with water until neutral, and the activated polyurethane sponge precursor was obtained. The activated polyurethane sponge precursor is placed in a chemical bath with a pH value of 12.5 to 13, and electroless plated at 50°C for 32 hours to obtain a three-dimensional network copper-plated / polyurethane sponge. The composition of the electroless bath is: 16g / LCuSO 4 ·5H 2 O, 19g / L EDTA-2Na, 12g / L NaKC 4 h 4 o 6 4H 2 O, 20mg / L 2,2′-bipyridine, 20mg / L K 4 Fe(CN) 6 , 13mL...

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
densityaaaaaaaaaa
flexural strengthaaaaaaaaaa
electrical resistivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a three-dimensional network copper-copper / graphite composite material. The material is characteristic in that three-dimensional network copper is served as a framework, the framework is filled with electrolytic copper and graphite copper powder to form the three-dimensional network copper-copper / graphite composite material. According to the material and the method, the three-dimensional network copper is applied to a graphite / cooper composite material, the cooper powder and the graphite powder are uniformly distributed in the composite material; and the composite material combines good mechanical property, good conductivity and friction and abrasion performance.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to the technical field of electrical contact materials, in particular to a three-dimensional network copper-copper / graphite composite material and a preparation method thereof. Background technique [0002] Graphite / copper composite materials have good electrical conductivity, low friction coefficient and wear rate, and are ideal materials for preparing modern self-lubricating friction parts and electrical contact conductive parts. Its demand field is very large, and it is widely used in generator motors, rail transit, aerospace and other fields that have special requirements for wear resistance, friction reduction, and electrical conductivity. At present, among the preparation methods of graphite / copper composite materials, the most widely used methods in the industrial field are powder metallurgy and melting casting. [1,2] . powder metallurgy [3] Copper p...

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): B22F3/11C22C1/08C22C9/00C22C32/00C23C18/38
CPCB22F3/114C22C9/00C22C32/0084C23C18/38
Inventor 冉丽萍王黎明朱林英陈伸干易茂中
Owner CENT SOUTH UNIV