Preparation method for carbon/carbon-copper composite material

A technology of composite materials and prefabricated parts, which is applied in the direction of heating/cooling fabrics, textiles and papermaking, fabric surface trimming, etc., and can solve problems such as difficulties in preparing fiber prefabricated parts

Inactive Publication Date: 2010-07-28
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the key problem of difficulty in preparing fiber preforms in carbon / copper composite materials. On the basis of the existing carbon / carbon composite material preparation methods and carbon / copper composite material preparation methods, a carbon / copper composite material preparation method is designed and proposed. Preparation method of carbon-copper composite material

Method used

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  • Preparation method for carbon/carbon-copper composite material
  • Preparation method for carbon/carbon-copper composite material

Examples

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Effect test

Embodiment 1

[0013] Example 1: Firstly, the polyacrylonitrile pre-oxidized fiber felt is needle-punched, and then carbonized to obtain a carbon fiber needle-punched felt. The temperature of carbonization is 1050° C., and the time is 2 hours; at this time, the density of the carbon felt body is 0.2 g / cm 3 , the carbon fiber volume content is 11%; the chemical vapor infiltration process is used to form pyrolytic carbon and infiltrate into the carbon fiber needle felt to make it densified, and the preparation density is 0.6g / cm 3 The carbon / carbon preform is then subjected to a high temperature treatment at a temperature of 2000-2500°C. Put the carbon / carbon preform into the steel mold, the carbon / carbon preform is at the bottom of the mold, put the copper rod on the upper end of the carbon / carbon preform, and finally seal the mold and put it into the heating furnace, the furnace body While heating up, vacuumize the closed mold. When the temperature in the furnace reaches 1200°C, keep it wa...

Embodiment 2

[0014] Example 2: Firstly, the polyacrylonitrile pre-oxidized fiber felt is needle-punched, and then carbonized to obtain a carbon fiber needle-punched felt. The temperature of carbonization is 1050° C., and the time is 2 hours; at this time, the density of the carbon felt body is 0.2 g / cm 3 , the carbon fiber volume content is 11%; the chemical vapor infiltration process is used to form pyrolytic carbon and infiltrate into the carbon fiber needle felt to make it densified. When the carbon / carbon preform density is 0.6g / cm 3 At the same time, it is subjected to a high temperature treatment at a temperature of 2000-2500 °C, and then the chemical vapor infiltration process is continued, and the final carbon / carbon preform has a density of 0.96g / cm 3 . The carbon / carbon preform is put into a steel mold, the carbon / carbon preform is placed at the bottom of the mold, and the copper rod is placed on the upper end of the carbon / carbon preform; the mold is sealed and put into a heat...

Embodiment 3

[0015] Example 3: First, the polyacrylonitrile pre-oxidized fiber felt is needled, and then carbonized to obtain a carbon fiber needle felt. The temperature of carbonization is 1050 ° C, and the time is 2 hours; at this time, the density of the carbon felt body is 0.2g / cm 3 , the carbon fiber volume content is 11%; the chemical vapor infiltration process is used to form pyrolytic carbon and infiltrate into the carbon fiber needle felt to make it densified. When the carbon / carbon preform density is 0.6g / cm 3 At the same time, it is subjected to a high-temperature treatment at a temperature of 2000-2500 ° C, and then the chemical vapor infiltration process is continued, and the final carbon / carbon preform has a density of 0.99 g / cm 3 . The carbon / carbon preform is put into a steel mold, the carbon / carbon preform is placed at the bottom of the mold, and the copper rod is placed on the upper end of the carbon / carbon preform; the mold is sealed and put into a heating furnace, Va...

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Abstract

The invention relates to a preparation method for a carbon/carbon-copper composite material, which belongs to the technical field of special carbon fiber composite materials. The preparation method mainly comprises the following preparation processes: preparation of carbon fiber green bodies; preparation of carbon/carbon preforms; and preparation of the carbon/carbon-copper composite material. The preparation processes comprise the following steps: firstly, cross-linking fibers in a pre-oxidized fiber felt of polyacrylonitrile by using needle-punching; secondly, performing carbonization on the needle-punched pre-oxidized fiber felt to form a carbon fiber needle-punched felt; thirdly, depositing pyrolytic carbon on the surfaces of the carbon fibers by using a chemical vapor infiltration (CVI) process, or densifying the carbon fibers by using a process combining the CVI process and resin impregnation, wherein the carbon fibers are adhered together through the pyrolytic carbon or the pyrolytic carbon and resin carbon to form a porous carbon/carbon composite material preform; and fourthly, performing high-temperature treatment on the porous carbon/carbon composite material preform, and impregnating the solution of copper into the carbon/carbon composite material preform by using a gas pressure infiltration method to obtain the carbon/carbon-copper composite material finally.

Description

technical field [0001] The invention relates to a method for preparing a carbon / carbon-copper composite material, which belongs to the technical field of special carbon fiber composite materials. Background technique [0002] Carbon fiber-copper composite material has high strength, good conductivity, wear resistance, corrosion resistance, and A series of advantages such as arc ablation and fusion welding resistance, so it is applied to sliding materials, power semiconductor support electrode materials, integrated circuit cooling plates and wear-resistant devices. However, in the process of preparing carbon fiber-copper-based materials, problems such as non-wettability of carbon fibers and copper, uneven dispersion of fibers, and fiber damage are difficult to solve, which affects the performance of the material and the preparation process is complicated. The general carbon / copper composite material preparation process includes two steps: 1. Preparation of carbon fiber prefa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/12C04B35/83D06C7/04C22C101/10
Inventor 孙晋良任慕苏李红孙乐张国定陈一飞
Owner SHANGHAI UNIV
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