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A preparation method of copper/carbon-based composite material for pantograph sliding plate

A technology for pantograph slides and composite materials, applied in carbon preparation/purification, metal material coating process, coating, etc., can solve the problems of limited application range, easy cracks, etc., to improve interface bonding and avoid cracks Produces the effect of low coefficient of friction

Active Publication Date: 2019-04-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there have been patents mentioning the use of resin-impregnated copper foam to prepare foam copper / carbon-based composite materials, but the developed products are prone to cracks, which limits its scope of application.

Method used

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  • A preparation method of copper/carbon-based composite material for pantograph sliding plate
  • A preparation method of copper/carbon-based composite material for pantograph sliding plate
  • A preparation method of copper/carbon-based composite material for pantograph sliding plate

Examples

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Effect test

example 1

[0067] The preparation process and process parameters are:

[0068] (1) Select the size and performance of copper foam: pore diameter 1mm, porosity 90%, copper content greater than 99%, pore number 30PPI, connectivity rate greater than 98%, density 0.45g / cm 2 , the size is 40mm*100mm*100mm. Use 10% dilute hydrochloric acid to deoxidize and activate the copper foam under ultrasonic waves, then wash it with distilled water, and dry it for later use.

[0069] (2) The chemical vapor infiltration process is used to densify the foamed copper preform with pyrolytic carbon. The reaction gas is prepared from carbon source gas and dilution gas. The carbon source gas is propylene and the dilution gas is N. 2 , the dilution ratio is carbon source gas: dilution gas = 1:6, the deposition temperature is 800°C, and the total deposition time is 50 hours;

[0070] (3) The content of pitch coke is 20%, and the pitch coke is 100 mesh; the content of chopped carbon fiber is 8%, and the length of...

example 2

[0074] The preparation process and process parameters are:

[0075] (1) Select the size and performance of copper foam: pore diameter 1mm, porosity 90%, copper content greater than 99%, pore number 20PPI, connectivity rate greater than 98%, density 0.45g / cm 2 , the size is 40mm*100mm*100mm. Use 10% dilute hydrochloric acid to deoxidize and activate the copper foam under ultrasonic waves, then wash it with distilled water, and dry it for later use.

[0076] (2) The chemical vapor infiltration process is used to densify the foamed copper preform with pyrolytic carbon. The reaction gas is prepared from carbon source gas and dilution gas. The carbon source gas is propylene and the dilution gas is N. 2 , the dilution ratio is carbon source gas: dilution gas = 1:6, the deposition temperature is 800°C, and the total deposition time is 50 hours;

[0077] (3) The content of pitch coke is 30%, and the pitch coke is 100 mesh; the content of chopped carbon fiber is 8%, and the length of...

example 3

[0081] The preparation process and process parameters are:

[0082] (1) Select the size and performance of copper foam: pore diameter 1mm, porosity 85%, copper content greater than 99%, pore number 30PPI, connectivity rate greater than 98%, density 0.51g / cm 2 , the size is 40mm*100mm*100mm. Use 10% dilute hydrochloric acid to deoxidize and activate the copper foam under ultrasonic waves, then wash it with distilled water, and dry it for later use.

[0083] (2) The chemical vapor infiltration process is used to densify the foamed copper preform with pyrolytic carbon. The reaction gas is prepared from carbon source gas and dilution gas. The carbon source gas is propylene and the dilution gas is N. 2 , the dilution ratio is carbon source gas: dilution gas = 1:6, the deposition temperature is 800°C, and the total deposition time is 50 hours;

[0084] (3) The pitch coke content is 20%, and the pitch coke is 100 mesh; the chopped carbon fiber content is 15%, and the short fiber le...

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Abstract

The present invention relates to preparation of a novel copper / carbon-based composite material. According to the preparation method, foamed copper is used as a copper source, and a semi-finished product is obtained by depositing pores on the foamed copper through chemical vapor deposition and depositing pyrolytic carbon on the surface, wherein the porosity of the foamed copper is 60-98%, and the through pore rate is higher than 98%; the obtained semi-finished product is embedded in mixed powder A, pressurization immersion is performed at a temperature of 540-560 DEG C under a pressure of 3-10 MPa, heating is performed to achieve a temperature of 800-950 DEG C after the immersion is completed, and carbonization is performed to obtain a pre-finished product, wherein the mixed powder A comprises pitch coke, short fiber, graphite and kerosene asphalt according to a mass ratio of 5-25:5-15:3-20:50-87; and the semi-finished product is repeatedly subjected to the pressurization immersion and the carbonization at least two times to obtain the finished product. The product of the present invention has the excellent performance, and the preparation process is simple, and is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to the preparation of a novel copper / carbon-based composite material, in particular to a method for preparing a self-lubricating material with high electrical conductivity and high thermal conductivity. Background technique [0002] In recent years, in order to alleviate the contradiction between the increasing number of passengers and insufficient railway capacity, and improve the operational efficiency of railways, my country has successively opened high-speed EMU trains with speeds of 250km / h and 350km / h. High-speed EMU trains have become the fastest and most efficient means of transportation on the road. The pantograph / catenary system is the source of power for the electric locomotive. The two introduce current into the locomotive through sliding contact to drive the locomotive to run, and the transmission power is as high as 10,000KW. With the development of high-speed and electrified railways, pantograph sliding plate mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C23C16/26
CPCC01P2004/01C23C16/26
Inventor 张红波王培尹健熊翔吴晓光邓朝勇
Owner CENT SOUTH UNIV
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