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Preparation method for carbon/carbon-graphite composite material used for pantograph slide plate of high-speed train

A technology for pantograph slides and high-speed trains, applied in the field of carbon/carbon-graphite composite material preparation, which can solve problems such as poor mechanical properties and weak electrical conductivity, and achieve the effects of small friction coefficient, good electrical conductivity, and high melting point

Inactive Publication Date: 2013-11-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of poor mechanical properties and weak electrical conductivity of the carbon / carbon composite materials prepared in the prior art, and provide a carbon / carbon-graphite composite material for high-speed train pantograph slides method

Method used

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  • Preparation method for carbon/carbon-graphite composite material used for pantograph slide plate of high-speed train
  • Preparation method for carbon/carbon-graphite composite material used for pantograph slide plate of high-speed train
  • Preparation method for carbon/carbon-graphite composite material used for pantograph slide plate of high-speed train

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specific Embodiment approach 1

[0013] Embodiment 1: This embodiment is a method for preparing a carbon / carbon-graphite composite material for a pantograph slide plate of a high-speed train, which is specifically completed according to the following steps:

[0014] 1. Configure graphite suspension: disperse graphite into the medium by ultrasonic dispersion method or ball milling method, and configure graphite suspension with a concentration of 80g / L-200g / L; 2. Prepare graphite preform: disperse graphite with a density of 0.1 g / cm 3 ~0.7g / cm 3 , carbon fiber felt preforms with a thickness of 0.1 cm to 10 cm are added to graphite suspensions with a concentration of 80 g / L to 200 g / L, and graphite preforms are obtained by ultrasonic impregnation or vacuum pressure impregnation, wherein the graphite preforms The content of graphite in the body is 1vol%~10vol%; 3. Impregnation-carbonization and densification of pitch: the impregnation-carbonization and densification of graphite prefabricated body obtained in ste...

specific Embodiment approach 2

[0019] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultrasonic dispersion method described in Step 1 is specifically operated as follows: ultrasonically disperse graphite into the medium, and ultrasonically disperse for 0.5 h to 2 h. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the specific operation of the ball milling method described in step one is as follows: the mass ratio of the ball material is (10~30):1. Disperse into the medium by ball milling, and the ball milling time is 0.5h~2h. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method for a carbon / carbon-graphite composite material, and particularly relates to a preparation method for a carbon / carbon-graphite composite material used for a pantograph slide plate of a high-speed train. The objective of the invention is to solve problems, namely bad mechanical properties and weak conductivity, of carbon / carbon composite materials prepared in the prior art. The method comprises specific operation steps of (1) preparation of a graphite suspending liquid; (2) preparation of a graphite prefab; and (3) dipping-carbonization densification of asphalt. The method is advantaged by (1) improving mechanical properties of carbon slide plates; (2) reducing resistivity of the carbon slide plates and increasing conductivity; and (3) reducing damage to contact nets and reducing arc wear. The carbon / carbon-graphite composite material is mainly used for materials of the pantograph slide plate of the high-speed train.

Description

technical field [0001] The invention relates to a preparation method of carbon / carbon-graphite composite material. Background technique [0002] In recent years, high-speed trains with a speed of more than 300km / h have been opened one after another around the world, bringing convenience to life and contributing to social progress. But the improvement of train speed has also brought many new scientific and technological problems. The high-speed train skateboard is in sliding contact with the catenary wire, and the load current of about 500A is transmitted from the 25-27kV high-voltage catenary to the locomotive, and the requirements for the performance of the skateboard material become extremely stringent. At present, there are three commonly used skateboard materials: the first one is Cu-based alloy plus lubricating phase, which has good mechanical properties and electrical conductivity, but it has great damage to the catenary, and its own arc wear is serious; the second on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 温广武黄小萧郑强张晓东
Owner HARBIN INST OF TECH
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