A short process preparation method of copper-carbon composite material

A composite material and short-process technology, which is applied in the field of short-process preparation of carbon-copper composite materials, can solve the problems of high carbon content, increased process cost, and deteriorated material performance of copper-carbon composite materials, so as to achieve improved mechanical properties, excellent electrical properties, and improved The effect of uniformity

Active Publication Date: 2020-07-31
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN1213876A discloses a process of mixing copper or silver and carbonaceous powder or metal powder to improve its interface. The process of this method is complicated and requires repressing and refiring, which leads to an increase in process cost. At the same time, it is necessary to add 0 -20% binder, which tends to remain inside the composite material and deteriorate material properties
CN 105880284A discloses a method for preparing a high-conductivity copper-carbon composite material, which evenly spreads graphite powder on a copper plate, and then performs repeated rolling to improve the material interface. The composite material prepared by this method has good conductivity, but repeated rolling The process flow is too long, and the process is not easy to control, and the carbon content of the copper-carbon composite material prepared by it is generally high

Method used

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  • A short process preparation method of copper-carbon composite material
  • A short process preparation method of copper-carbon composite material
  • A short process preparation method of copper-carbon composite material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0039] Select the copper oxide powder whose particle size range is 75-125 μm, the cuprous oxide powder whose particle size range is 75-125 μm, and the graphite powder whose particle size range is 30-80 μm as raw materials, and prepare the copper-carbon composite material according to the following steps, (1 ) Gas-protected ball milling: 10g cupric oxide powder, 90g cuprous oxide powder and 19g powdered graphite are packed into the ball milling tank of argon-filled planetary ball mill for ball milling, the ball-material ratio is 8:1, the rotating speed is 150rpm, and the ball milling time is 2 hours; (2) Vacuum hot pressing: cold press the mixed powder obtained in step (1) and put it into a copper sleeve, then put the copper sleeve into a vacuum hot press mold, and evacuate to 10 -3 Pa, after raising the temperature to 500°C at a rate of 10°C / min, pressurize at 15MPa, keep the temperature for 3h, then raise the temperature to 900°C at a rate of 15°C / min, pressurize at 40MPa, and...

Embodiment 2

[0046] Select the copper oxide powder whose particle size range is 75-125 μm, the cuprous oxide powder whose particle size range is 75-125 μm, and the graphite powder whose particle size range is 30-80 μm as raw materials, and prepare the copper-carbon composite material according to the following steps, (1 ) Gas-protected ball milling: 10g cupric oxide powder, 90g cuprous oxide powder and 33g powdered graphite are packed into the ball milling tank of the planetary ball mill filled with argon for ball milling, the ball-to-material ratio is 8:1, the rotating speed is 150rpm, and the ball milling time is 2 hours; (2) Vacuum hot pressing: cold press the mixed powder obtained in step (1) and put it into a copper sleeve, then put the copper sleeve into a vacuum hot press mold, and evacuate to 10 -3 Pa, after raising the temperature to 500°C at a rate of 10°C / min, pressurize at 15MPa, keep the temperature for 3h, then raise the temperature to 900°C at a rate of 15°C / min, pressurize a...

Embodiment 3

[0049] Select the copper oxide powder whose particle size range is 75-125 μm, the cuprous oxide powder whose particle size range is 75-125 μm, and the graphite powder whose particle size range is 30-80 μm as raw materials, and prepare the copper-carbon composite material according to the following steps, (1 ) Gas-protected ball milling: 10g cupric oxide powder, 90g cuprous oxide powder and 45g powdered graphite are packed into the ball milling tank of argon-filled planetary ball mill for ball milling, the ball-material ratio is 8:1, the rotating speed is 150rpm, and the ball milling time is 2 hours; (2) Vacuum hot pressing: cold press the mixed powder obtained in step (1) and put it into a copper sleeve, then put the copper sleeve into a vacuum hot press mold, and evacuate to 10 -3 Pa, after raising the temperature to 500°C at a rate of 10°C / min, pressurize at 15MPa, keep the temperature for 3h, then raise the temperature to 900°C at a rate of 15°C / min, pressurize at 40MPa, and...

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Abstract

The invention relates to a short-process preparation method of a carbon and copper composite material. The short-process preparation method comprises the following steps of selecting the copper oxidepowder, and uniformly mixing with the carbon powder; directly pressing in a hot way, and sintering; compounding to react in situ, so as to complete the in-situ compounding and densifying of the copperand carbon composite material at one step, wherein the content of carbon in the prepared copper and carbon composite material is 5% to 60%. The short-process preparation method has the characteristics that the direct oxidative reduction reaction of the copper oxide powder and the carbon powder is utilized, so that the preparation process is greatly shortened, the densifying is further performed,and the carbon and copper composite material is obtained; the bonding of the copper substrate and the carbon is effectively improved, the copper and the graphite are firmly bonded, the uniformity of two phases in the copper and carbon composite material is effectively improved, the influence to the conductivity of the material by the two-phase interface is furthest reduced, and the mechanical property of the copper and carbon composite material is greatly improved; the technology is simple, and the two phases of substrate and carbon of the prepared carbon and copper composite material are uniformly distributed and are well bonded; the mechanical property, chemical property, and friction and corrosion property are excellent.

Description

technical field [0001] The invention discloses a short-process preparation method of a carbon-copper composite material. It belongs to the technical field of powder metallurgy. Background technique [0002] High-performance copper-carbon composite material is a metal matrix composite material with great development prospects. It not only has good strength and hardness of copper, excellent electrical conductivity, thermal conductivity, and corrosion resistance, but also has good self-lubricating properties of carbon, high Melting point, welding resistance and arc ablation resistance have been widely used in the fields of electrical contact materials, friction materials, oil bearings, conductive materials and mechanical parts materials. [0003] The conventional method of preparing copper-carbon composite materials is powder metallurgy, which is directly mixed and sintered by copper powder and graphite powder, but there are a lot of holes in the copper-carbon composite materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C9/00B22F3/14
CPCB22F3/14B22F2999/00C22C1/058C22C9/00C22C32/0084B22F3/1007B22F2201/20
Inventor 肖柱李周陈如丝方梅龚深雷前
Owner CENT SOUTH UNIV
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