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A kind of preparation method of low resistivity c/c composite material carbon slider

A composite material, low resistivity technology, applied in the field of preparation of low resistivity C/C composite carbon sliders, to achieve the effect of improving physical properties

Active Publication Date: 2018-05-18
杭州卓导新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] How to prepare a carbon slider with a resistivity of less than 23μΩ·m, or even less than 20μΩ·m and less than or equal to 10μΩ·m using only carbon materials has not been reported in the existing literature

Method used

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  • A kind of preparation method of low resistivity c/c composite material carbon slider

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The volume content of granular graphite (250 microns) is 5%, and the density is 0.33g / cm 3 The 2.5D carbon fiber needle-punched integral felt is a prefabricated body, which is prepared by chemical vapor infiltration process with a density of 1.56g / cm 3 The C / C composite material with a density of 1.76g / cm was prepared through two resin impregnation-carbonization processes. 3 The C / C composite material obtained by 2000 ℃ high temperature heat treatment and machining to obtain the C / C slider.

[0038] The C / C pantograph slider in this example is mainly prepared through the following steps:

[0039] (1) First, the PAN type T700 (12K) carbon fiber produced by Japan Toray Company (Toray) is used to make a mesh tire and a weft-free cloth. The single-layer 0° non-weft cloth, mesh layer, granular graphite, 90° non-weft cloth, mesh layer, granular graphite, and 0° non-weft cloth are superimposed in sequence, and then, the density is made by relay needle punching method. 0.33g...

Embodiment 2

[0045] Using -100 mesh flake graphite (particle size is 150 micron) volume content is 15%, density is 0.69g / cm 3 The 2.5D carbon fiber needle-punched integral felt is a prefabricated body, which is prepared by chemical vapor infiltration process with a density of 1.54g / cm 3 The C / C composite material with a density of 1.73g / cm was prepared after two resin impregnation-carbonization processes. 3The C / C composite material, through 2100 ℃ high temperature heat treatment and machining to obtain the C / C slider.

[0046] The C / C pantograph slider in this example is mainly prepared through the following steps:

[0047] (1) First of all, the PAN type T700 (12K) carbon fiber produced by Japan's Toray Company (Toray) is used to make the net tire and no-weft fabric, and the single-layer 0° no-weft fabric, net tire layer, flake graphite, 90° The non-weft cloth, mesh layer, flake graphite, and 0° non-weft cloth are stacked in sequence, and then, the density is 0.69g / cm by the method of r...

Embodiment 3

[0053] Using -325 mesh flakes (particle size is 45 microns), the graphite volume content is 25%, and the density is 0.88g / cm 3 The 2.5D carbon fiber needle-punched integral felt is a prefabricated body, which is prepared by chemical vapor infiltration process with a density of 1.59g / cm 3 The C / C composite material with a density of 1.78g / cm was prepared after two resin impregnation-carbonization processes. 3 The C / C composite material obtained by 2300 ℃ high temperature heat treatment and machining to obtain the C / C slider.

[0054] The C / C pantograph slider in this example is mainly prepared through the following steps:

[0055] (1) First of all, the PAN type T700 (12K) carbon fiber produced by Japan's Toray Company (Toray) is used to make the net tire and no-weft fabric, and the single-layer 0° no-weft fabric, net tire layer, flake graphite, 90° The non-weft cloth, mesh layer, flake graphite, and 0° non-weft cloth are stacked in sequence, and then, the density is 0.88g / cm ...

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Abstract

The invention relates to a method for preparing a low-resistivity C / C composite material carbon slider, and belongs to the technical field of preparation of materials for electric locomotives. In the present invention, the single-layer 0° latitude-free carbon cloth, carbon fiber mesh tire, graphite powder, single-layer 90° latitude-free carbon cloth, carbon fiber mesh tire, graphite powder, and single-layer 0° latitude-free carbon cloth are sequentially superimposed, The carbon fiber bundles are introduced perpendicular to the laying direction by the relay needling method to make a 2.5D carbon fiber needle-punched integral felt with a density of 0.2-0.9g / cm3, followed by pre-high temperature treatment at 1500-2100°C After treatment, carry out chemical vapor deposition pyrolysis carbon treatment to obtain a C / C composite material with a density of 1.4-1.6g / cm3; then perform machining and polymer impregnation-carbonization treatment to obtain a high-density composite material with a density of 1.7-1.9g / cm3 Density C / C composite material; finally, after graphitization treatment, a carbon slider is obtained. The preparation process of the present invention is simple, the obtained product has superior performance, and is convenient for large-scale industrial application and production.

Description

technical field [0001] The invention relates to a method for preparing a low-resistivity C / C composite material carbon slider, and belongs to the technical field of preparation of materials 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] As a carbon slider that conducts electricity on the carbon slider, its conductivity is directly related to the resistivity of the carbon slider itself. The lower the resistivity of the carbon slider, the better the conductivity. For this reason, the EMU carbon skateboard provisional technical conditions TJ / CL328-2014 clearly stipulates the resistivity of the carbon skateboard. This document stipulates that the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B18/00
Inventor 肖鹏方华婵
Owner 杭州卓导新材料有限公司
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