Carbon-based composite material for sliding block of current collector and preparation method thereof

A carbon-based, slider technology, applied to non-metallic conductors and other directions, can solve the problems of different friction pair materials, and achieve the effects of small friction coefficient, simple preparation process and low cost

Active Publication Date: 2015-05-06
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apparently, due to the different ways of receiving electricity and the materials of the friction pairs, the material of the above-mentioned pantograph slide plate is not suitable for direct use as the material of the slider of the current collector.

Method used

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  • Carbon-based composite material for sliding block of current collector and preparation method thereof
  • Carbon-based composite material for sliding block of current collector and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Mixing: First, graphite, activated carbon and solid phenolic resin are uniformly mixed according to the mass ratio of 20%, 25% and 10%, and at the same time, silicon powder, glass powder, alumina, aluminum powder, tin powder, cobalt powder , copper powder and molybdenum disulfide powder are mixed evenly according to the mass ratio of 5%, 3%, 3%, 3%, 3%, 1%, 25% and 2%, and then the two groups of mixtures are stirred and mixed in a ball mill, and ball milled Time 10h to make molding powder;

[0036] (2) Thermocompression forming: put the molding powder obtained in step (1) into the mold, and heat, pressurize and solidify in four stages on the thermocompression molding machine:

[0037] The first stage: temperature 80℃, pressure 50MPa, holding time: 30min

[0038] The second stage: temperature 100℃, pressure 200MPa, holding time: 30min

[0039] The third stage: temperature 200℃, pressure 200MPa, holding time: 4-8h

[0040] The fourth stage: temperature 350℃, pressu...

Embodiment 2

[0045](1) Mixing: First, graphite, activated carbon and solid phenolic resin are uniformly mixed according to the mass ratio of 20%, 25% and 10%, and at the same time, silicon powder, glass powder, alumina, aluminum powder, tin powder, cobalt powder , copper powder and molybdenum disulfide powder are mixed evenly according to the mass ratio of 5%, 1%, 1%, 5%, 5%, 1%, 25% and 2%, and then the two groups of mixtures are stirred and mixed in a ball mill, and ball milled Time 10h to make molding powder;

[0046] (2) Thermocompression forming: put the molding powder obtained in step (1) into the mold, and heat, pressurize and solidify in four stages on the thermocompression molding machine:

[0047] The first stage: temperature 80℃, pressure 50MPa, holding time: 30min

[0048] The second stage: temperature 100℃, pressure 200MPa, holding time: 30min

[0049] The third stage: temperature 200℃, pressure 200MPa, holding time: 4-8h

[0050] The fourth stage: temperature 350℃, pressur...

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Abstract

The invention relates to a carbon-based composite material for a sliding block of a current collector. The carbon-based composite material is characterized by using a mixture of 15 to 30 mass percent of graphite and 20 to 30 mass percent of active carbon as a matrix, using 15 to 35 mass percent of copper powder as a conductive component, using 10 to 20 mass percent of solid phenolic resin as a binder and using a mixture of 1 to 6 mass percent of silicon powder, 1 to 6 mass percent of glass powder, 1 to 6 mass percent of aluminium oxide powder, 2 to 8 mass percent of aluminium powder, 2 to 8 mass percent of tin powder, 1 to 2 mass percent of cobalt powder and 1 to 2 mass percent of molybdenum disulfide as a modifier. The carbon-based composite material has a metal conductive network structure and can effectively improve conductivity; the graphite serves as the matrix and has antifriction effect, so the prepared sliding block material has small friction coefficient; and the modified components can improve the interface combination of a metal matrix and a carbon matrix and improve the mechanical property of the carbon-based sliding block material.

Description

technical field [0001] The invention relates to a carbon-based composite material for a current collector slider of a subway and light rail vehicle suitable for receiving electricity from a conductive rail and a preparation method thereof, belonging to the technical field of carbon-based composite materials. Background technique [0002] There are two ways to receive electricity for urban rail vehicles: overhead catenary and conductive rail. Conductive rail power receiving system is receiving more and more attention and application because of its easy installation, convenient maintenance, long life and small environmental impact. The current receiver slider is the key collector element of the conductor rail power receiving system, and it is in sliding contact with the conductor rail for a long time, so the slider material is required not only to have good electrical conductivity, but also to have high mechanical strength and a small friction coefficient , and in view of its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/06C22C30/00C22C1/05
Inventor 罗瑞盈李密丹
Owner BEIHANG UNIV
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