A kind of gradient structure metal type c/c composite material and its preparation method and application

A composite material, gradient structure technology, used in transportation and packaging, electric vehicles, current collectors, etc., can solve the problems of heavy weight and large wire wear, and achieve the effect of low bonding resistance, low resistivity, and reducing adhesive wear.

Active Publication Date: 2019-01-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a metal type C / C with a gradient structure, light weight, low resistivity, and less wear to the contact wire in view of the heavy weight of the existing metal-impregnated carbon slide bar and the large wear on the wire. Composite material slide bar and its preparation method and application

Method used

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  • A kind of gradient structure metal type c/c composite material and its preparation method and application
  • A kind of gradient structure metal type c/c composite material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Using a felt body with a mass content of 94% copper in the bonding layer and a mass content of 20% copper in the friction layer as a prefabricated body, a composite material with a residual porosity of 15% was prepared by a chemical vapor deposition process, and two resin impregnation-carbonization process, prepared an average density of 2.4g / cm 3 Gradient metal type C / C slider.

[0042] Specific steps are as follows:

[0043](1) The carbon fiber prefabricated body consists of two parts, the adhesive layer and the friction layer, which are connected into one body by needle punching. The bonding layer is composed of 0° latitude-free carbon cloth, carbon fiber mesh tire, copper mesh, 90° latitude-free carbon cloth, carbon fiber mesh tire, copper powder, and 0° latitude-free carbon cloth. The quality of copper mesh and copper powder are respectively Accounting for 74% and 20% of the total mass of the bonding layer; the friction layer is composed of 0° latitude carbon clo...

Embodiment 2

[0047] Using a felt body with a mass content of 90% copper in the bonding layer and a mass content of 82% copper in the friction layer as the prefabricated body, a composite material with a residual porosity of 12% was prepared by chemical vapor deposition, and the composite material was prepared by two resin impregnation-carbonization process, prepared an average density of 2.9g / cm 3 Gradient metal type C / C slider.

[0048] Specific steps are as follows:

[0049] (1) The carbon fiber prefabricated body consists of two parts, the adhesive layer and the friction layer, which are connected into one body by needle punching. The bonding layer is composed of 0° latitude-free carbon cloth, carbon fiber mesh, copper mesh, 90° latitude-free carbon cloth, carbon fiber mesh, short copper wire, and latitude-free carbon cloth. The quality of the copper mesh and the quality of the short copper wire are respectively Accounting for 68% and 22% of the total mass of the bonding layer; the fr...

Embodiment 3

[0053] Using a felt body with a mass content of 56% copper in the bonding layer and a mass content of 50% copper in the friction layer as a prefabricated body, a composite material with a residual porosity of 16% was prepared by a chemical vapor deposition process. process, prepared an average density of 2.2g / cm 3 Gradient metal type C / C slider.

[0054] Specific steps are as follows:

[0055] (1) The carbon fiber prefabricated body consists of two parts, the adhesive layer and the friction layer, which are connected into one body by needle punching. The bonding layer is composed of 0° latitude-free carbon cloth, carbon fiber mesh, copper mesh, 90° latitude-free carbon cloth, carbon fiber mesh, copper powder, and latitude-free carbon cloth. The knot layer lays 55% and 15% of the total mass; the friction layer consists of 0° latitude-free carbon cloth, carbon fiber mesh tire, copper mesh, 90° latitude-free carbon cloth, carbon fiber mesh tire, copper mesh, and 0° latitude-fre...

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Abstract

The invention discloses a gradient metal C / C composite material and a preparation method and an application thereof, and belongs to the technical field of development of materials for electric locomotives. The composite material designed by the invention comprises a bonding layer and a friction layer. First copper and a carbon / carbon composite material are uniformly distributed in the bonding layer, and the first copper accounts for 30-70% of the total mass of the bonding layer. Second copper and a carbon / carbon composite material are uniformly distributed in the friction layer, and the second copper accounts for 20-60% of the total mass of the friction layer. The preparation method comprises the following steps: designing a carbon fiber precast body into a structure composed of an upper layer and a lower layer, wherein the upper layer is a bonding layer, and the lower layer is a friction layer; introducing copper wires or carbon fire bundles along a direction perpendicular to the laying direction through a relay-like needling method to weave the upper and lower layers into a whole; and carrying out pyrolytic carbon deposition and polymer impregnation-carbonization to get a sample. The gradient metal C / C composite material is reasonable in structure design, the preparation technology is simple, and the obtained product has good performance.

Description

technical field [0001] The invention discloses a metal type C / C composite material with a gradient structure, a preparation method and application thereof, and belongs to the technical field of material development for electric locomotives. Background technique [0002] Electric traction high-speed trains use the carbon sliders on the pantograph carbon slides to frictionally contact with the catenary wires to transmit the current on the power grid to the locomotive power system, thereby supplying power to the high-speed train and maintaining the normal operation of the locomotive. [0003] At present, the widely used carbon sliders include pure carbon sliders and impregnated metal sliders, both of which have their own advantages and disadvantages. The pure carbon slider has little wear on the contact wire, and the contact wire has a long service life. The disadvantage is that the resistivity of the carbon strip is high, and the bonding resistance after bonding with the alum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L5/20C04B35/83C04B35/622
CPCB60L5/205C04B35/622C04B35/83C04B2235/407C04B2235/5216C04B2235/5248C04B2235/5256C04B2235/614C04B2235/75
Inventor 肖鹏方华婵
Owner CENT SOUTH UNIV
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