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Method for preparing C/C-Cu composite material through Cu-Mo mixed infiltration

A composite material and infiltration technology, used in the field of metal impregnation carburizing/carbon composite materials, can solve the problems of poor interface wettability between copper and carbon, achieve good compactness, achieve penetration, and improve poor interface wettability.

Active Publication Date: 2018-01-19
GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing C / C-Cu composite material by Cu-Mo mixed impregnation, which can improve the disadvantages of poor wettability of copper and carbon interface in the prior art by adding Mo element, and has the advantages of simple process , easy control and other advantages

Method used

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  • Method for preparing C/C-Cu composite material through Cu-Mo mixed infiltration

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A method for preparing C / C-Cu composite material by mixed impregnation of Cu-Mo, the steps are as follows:

[0021] (1) Carbon fiber needle-punched felt is used as the prefabricated body, and the density is 1.1g / cm3 prepared by chemical vapor infiltration process 3 C / C porous body;

[0022] (2), after mixing Mo powder and Cu powder, in N 2 Ball milling in a high-energy ball mill under protection for 24 hours; the mass ratio of the Cu powder to the Mo powder is 10:1, and the mass of the Cu powder is 1.5 times that of the C / C porous body;

[0023] (3) Embed the C / C porous body obtained in step (1) in the mixed powder obtained in step (2), and put it into a graphite crucible; place the graphite crucible in a high-temperature graphitization furnace for heat treatment under the protection of an inert atmosphere , carry out infiltration Cu reaction, the heating rate is 5°C / min, first keep at 1000°C for 2h, then at 1250°C for 2h, and then cool down with the furnace;

[0024...

Embodiment 2

[0027] A method for preparing C / C-Cu composite material by mixed impregnation of Cu-Mo, the steps are as follows:

[0028] (1) Carbon fiber needle-punched felt is used as the prefabricated body, and the density is 1.3g / cm3 prepared by chemical vapor infiltration process 3 C / C porous body;

[0029] (2), after mixing Mo powder and Cu powder, in N 2 Ball milling in a high-energy ball mill under protection for 16 hours; the mass ratio of the Cu powder to the Mo powder is 9:1, and the mass of the Cu powder is 1.4 times that of the C / C porous body;

[0030] (3) Embed the C / C porous body obtained in step (1) in the mixed powder obtained in step (2), and put it into a graphite crucible; place the graphite crucible in a high-temperature graphitization furnace for heat treatment under the protection of an inert atmosphere , carry out the infiltration Cu reaction, the heating rate is 10°C / min, first hold at 1100°C for 1.5h, then hold at 1200°C for 1.5h, and then cool down with the furn...

Embodiment 3

[0034] A method for preparing C / C-Cu composite material by mixed impregnation of Cu-Mo, the steps are as follows:

[0035] (1) Carbon fiber needle-punched felt is used as the prefabricated body, and the density is 1.4g / cm3 prepared by chemical vapor infiltration process 3 C / C porous body;

[0036] (2), after mixing Mo powder and Cu powder, in N 2 Ball milling in a high-energy ball mill under protection for 12 hours; the mass ratio of the Cu powder to the Mo powder is 8:1, and the mass of the Cu powder is 1.3 times that of the C / C porous body;

[0037] (3) Embed the C / C porous body obtained in step (1) in the mixed powder obtained in step (2), and put it into a graphite crucible; place the graphite crucible in a high-temperature graphitization furnace for heat treatment under the protection of an inert atmosphere , carry out the infiltration Cu reaction, the heating rate is 10°C / min, first hold at 900°C for 1 hour, then hold at 1300°C for 1 hour, and then cool down with the f...

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Abstract

The invention belongs to the field of C / C composite materials and discloses a method for preparing a C / C-Cu composite material through Cu-Mo mixed infiltration. A carbon fiber needled felt is adoptedas a prefab, and a C / C porous body is prepared through a chemical vapor phase infiltration technology; Mo powder and Cu powder are mixed and uniformly grinded under protection of N2; the C / C porous body is embedded in mixed powder, heat treatment is conducted under protection of a vacuum or inert atmosphere, heat preservation is conducted under 900-1100 DEG C for 1-2 h, then heat preservation is conducted under 1100-1300 DEG C for 0.5-2 h, and then natural cooling is conducted; and a blank obtained in a graphite crucible is taken out, that is, the C / C-Cu composite material is obtained. According to the method for preparing the C / C-Cu composite material through Cu-Mo mixed infiltration, the defect that in the prior art, the interfacial wettability of Cu and C is poor is overcome by adding Mo, and the method has the advantages of being simple in technology, easy to control and the like.

Description

technical field [0001] The invention belongs to the field of metal impregnated carburizing / carbon composite materials, and in particular relates to a method for preparing C / C-Cu composite materials by Cu-Mo mixed impregnation. Background technique [0002] C / Cu composite material is currently a widely used sliding conductive material, which combines the excellent friction and wear properties of carbon materials and the excellent electrical conductivity of copper alloys. However, since the two phases of Cu and C are not wetted, the interfacial bonding between the two is poor, and due to the lack of mechanical properties of graphite itself, C / Cu composites usually have problems of low density, poor electrical conductivity and mechanical properties. Therefore, C / C-Cu composites with interconnected structure have become a research hotspot in this field in recent years, and are widely used in the field of sliding electrical contacts, such as motor brushes, electric locomotive ska...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/10
Inventor 董会娜孙卫康张东生姚栋嘉吴恒刘喜宗
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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