Composite material of carbon/carbon/copper and production technology thereof

A carbon composite material and composite material technology, applied in the field of carbon/carbon/copper composite material and its production process, can solve the problems of brittle contact between fiber and fiber interface, difficult control of fiber volume content, expensive equipment, etc., to improve electrical and The effects of mechanical properties, simple and easy-to-control production process, and good preparation performance

Active Publication Date: 2008-06-11
HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of carbon fiber-copper matrix composites by powder metallurgy has the disadvantages of low production efficiency and complex production process, and is generally only suitable for short fiber-copper matrix composites with low fiber content; The damage is small, and the performance of the prepared material is better, but the equipment is expensive, the cost is high, it is not easy to produce in batches, and it is difficult to promote in industry; the preparation of carbon fiber-copper matrix composites by extrusion casting is an effective method, and the process parameters are easy Contr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A carbon / carbon / copper composite material, based on 100% by weight, the weight ratio of the carbon / carbon composite material to copper or copper alloy (copper powder is used in this embodiment) is 15 to 75 (75 in this embodiment): 85 ~25 (25 in this embodiment), the apparent density of the carbon / carbon / copper composite material after densification is 1.3g / cm 3 ~6.2g / cm 3 (the present embodiment is 2.5g / cm 3 ), the resistivity is 1 μΩm~26 μΩm (the present embodiment is 20 μΩm), the Shore hardness is 40~85 (the present embodiment is 80), and the bending strength is 35Mpa~150Mpa (the present embodiment is 130Mpa).

[0024] Its production process includes the following steps:

[0025] (1) Opening into a web: select short carbon fibers with a length of 6mm to 70mm according to the ratio, and open them into fluffy single fibers through an opening device, and then air-laid and / or carded the opened carbon fibers Form into a net (the present embodiment adopts air-laid and ca...

Embodiment 2

[0031] Based on 100% by weight, the weight ratio of carbon / carbon composite material to copper or copper alloy (copper-tin alloy powder is used in this embodiment) is 60:40, and the apparent density of the carbon / carbon / copper composite material after densification is 4.0g / cm 3 , the resistivity is 25μΩm, ​​the bending strength is 45MPa, and the Shore hardness is 50.

[0032] Its production process is in step (1), and the area density of described network tire is 85g / m 2 .

[0033] Step (2) is to flatten the net tire obtained in step (1) on the workbench, evenly sprinkle the copper-tin alloy powder selected according to the ratio on the net tire, and then lay a layer of net tire, through acupuncture, wrap Fix the copper-tin alloy powder, so that the required carbon / carbon / copper composite prefabricated parts are made repeatedly.

[0034] The acupuncture process is 12mm in depth; 7 punches / cm 2 .

[0035] The densification process adopts liquid phase impregnation to make t...

Embodiment 3

[0039] A kind of carbon / carbon / copper composite material, by weight 100%, the weight ratio of carbon / carbon composite material and copper or copper alloy (the present embodiment adopts copper powder) is 15~75 (the present embodiment is 20):85 ~25 (80 in this embodiment), the apparent density of the carbon / carbon / copper composite material after densification is 1.3g / cm 3 ~6.2g / cm 3 (the present embodiment is 6.2g / cm 3), the resistivity is 1 μΩm~26 μΩm (the present embodiment is 5 μΩm), the Shore hardness is 40~85 (the present embodiment is 45), and the bending strength is 35Mpa~150Mpa (the present embodiment is 65Mpa).

[0040] Its production process includes the following steps:

[0041] (1) Opening into a web: select short carbon fibers with a length of 6mm to 70mm according to the ratio, and open them into fluffy single fibers through an opening device, and then air-laid and / or carded the opened carbon fibers Form into a net (the present embodiment adopts air-laid and car...

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Abstract

The invention discloses carbon / carbon / copper composite material which has the advantages that the production process is easy to be controlled, the isotropy of the product is good, and the combined property is good. The invention is characterized in that the carbon / carbon / copper composite material is calculated according to the weight percentage, and the weight ratio of the carbon / carbon composite material to copper or copper alloy is 15 to 75: 85 to 25; the production process comprises the following steps: a prepared web and carbon cloth are compounded into a precasting part through needling, the carbon, the copper or the copper alloy with different morphologies is compounded into a whole through densification (or vacuum pressure copper cementation) to form the carbon / carbon / copper composite material; the production process of the invention is simple and easy to be controlled, and the made composite material has good abrasive resistance and feasible electrical conductivity, and also has the advantages of high specific strength, high specific modulus, high temperature resistance and ablation resistance, and can be applied to the high conductivity and abrasive resistance field; the abrasion loss of an electric brush made of carbon / carbon / copper composite material is lower than 0.18 mm / 50 hours, and the abrasion loss of the prior electric brush is generally higher than 0.20 mm / 50 hours.

Description

Technical field: [0001] The invention relates to a material used in the field of high electrical conductivity and wear resistance, in particular to a carbon / carbon / copper composite material and its production process. Background technique: [0002] Carbon fiber-copper matrix composites have high strength, good conductivity, With a series of advantages such as wear resistance, corrosion resistance, arc ablation resistance and fusion welding resistance, it has been widely used in electronic component materials, sliding materials, contact materials, integrated circuit cooling plates and wear-resistant devices, etc. It is a new type of functional material with great development prospects. At present, the following processes are mainly used to prepare carbon fiber-copper matrix composites: powder metallurgy, hot pressing, squeeze casting, etc. The preparation of carbon fiber-copper matrix composites by powder metallurgy has the disadvantages of low production efficiency and com...

Claims

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Application Information

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IPC IPC(8): C22C49/00C22C47/00
Inventor 廖寄乔邰卫平王跃军
Owner HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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