Preparation method of carbon/carbon-copper composite material

A technology of carbon composite materials and composite materials, applied in the field of preparation of carbon/carbon-copper composite materials, can solve the problems of poor electrical conductivity of carbon/copper composite materials, bulky and heavy equipment, poor bonding performance, etc., and achieve easy control of process conditions , low equipment requirements and low cost

Inactive Publication Date: 2013-11-20
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment required for the pressurized infiltration process is bulky and heavy, and the process cost is high. The two phases of carbon / copper are only mechanically bonded without metallurgical bonding, so the bonding performance is poor, and the prepared carbon / copper composite material has poor electrical conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Set the density to 0.6 g / cm 3 The carbon / carbon composite samples were ultrasonically cleaned in absolute ethanol for 0.3 h, and dried in a drying oven at 60 °C.

[0014] Will MoO 3 Mix well with NaCl, and the atomic mass of Mo contained in it is 20wt% of NaCl.

[0015] The carbon / carbon composite body is embedded in mixed salt and placed in a sealed graphite crucible. In a vacuum environment, keep warm at 900°C for 5 hours, cool to room temperature with the furnace, take out the sample, wash and dry to obtain dense Mo on the inner and outer layers. 2 C-layer carbon / carbon composite body.

[0016] Using copper as the infiltration agent, infiltrate the green body at 1100°C for 2 hours in a vacuum environment, and cool to room temperature with the furnace to obtain carbon / carbon-copper composite materials.

Embodiment 2

[0018] Set the density to 1.0 g / cm 3 The carbon / carbon composite samples were ultrasonically cleaned in absolute ethanol for 1 h, and dried in a drying oven at 70 °C.

[0019] Mix ammonium paramolybdate and KCl evenly, and the atomic mass of Mo contained in it is 15wt% of KCl.

[0020] The carbon / carbon composite green body is embedded in mixed salt and placed in a sealed alumina crucible. Under the protection of inert gas, keep warm at 950°C for 4 hours, cool to room temperature with the furnace, take out the sample, wash and dry to obtain dense Mo on both the inner and outer layers. 2 C-layer carbon / carbon composite body.

[0021] Using copper as the infiltration agent, in a protective atmosphere, infiltrate the green body at 1200 ° C for 1 hour, and cool to room temperature with the furnace to obtain carbon / carbon-copper composite materials.

Embodiment 3

[0023] Set the density to 1.4 g / cm 3 The carbon / carbon composite samples were ultrasonically cleaned in absolute ethanol for 1.5 h, and dried in a drying oven at 80 °C.

[0024] Mix ammonium orthomolybdate and ammonium dimolybdate with NaCl and KCl at a molar ratio of 1:1, and the atomic mass of Mo contained therein is 10wt% of that of NaCl and KCl.

[0025] The carbon / carbon composite body is embedded in mixed salt and placed in a sealed graphite crucible. In a vacuum environment, keep warm at 1000°C for 2 hours, cool to room temperature with the furnace, take out the sample, wash and dry to obtain dense Mo on both the inner and outer layers. 2 C-layer carbon / carbon composite body.

[0026] Using copper as the infiltration agent, infiltrate the green body at 1300°C for 0.5h in a vacuum environment, and cool to room temperature with the furnace to obtain a carbon / carbon-copper composite material.

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Abstract

The invention discloses a preparation method for a carbon / carbon-copper composite material. The preparation method comprises the following steps of: (1) cleaning a carbon / carbon-copper composite material sample in absolute ethyl alcohol and drying, wherein the density of the carbon / carbon-copper composite material sample is 0.6-1.6g / cm<3>; (2) uniformly mixing one or more than one of MoO3, ammonium orthomolybdate, ammonium paramolybdate, ammonium dimolybdate and ammonium tetramolybdate with one or more than one of alkali chlorides, wherein the mass percentage of Mo in the mixed salt is 5-20%; (3) embedding a green body obtained in the step (1) into the mixed salt obtained in the step (2), preserving heat for 0.5-5 hours at the temperature of 900-1100 DEG C, and cooling to the room temperature in the furnace; and (4) maintaining the temperature of the green body obtained in the step (3) for 0.5-2 hours at the temperature of 1100-1300 DEG C, and carrying out copper infiltration. The preparation method has the advantages that the mechanical and frictional wear properties of the material are improved on the premise that the high conductivity of the composite material is guaranteed; and requirement on equipment is low, the process is simple, and process conditions are easy to control.

Description

technical field [0001] The invention relates to a preparation method of carbon / carbon-copper composite material. Background technique [0002] Carbon / copper composite materials have been widely used in sliding electrical contact materials, pantograph sliding plate materials, Brushes, low-voltage circuit breakers, air automatic switches, power semiconductor support electrodes, integrated circuit cooling plates and self-lubricating bearings and other fields. However, due to the poor bonding performance of the carbon / copper phase, the current carbon / copper composites have problems such as poor density, high porosity, low interfacial bonding strength, and poor mechanical properties. [0003] Carbon / carbon-copper composite material is a new type of carbon / copper composite material. It uses carbon fiber reinforced carbon matrix composite material (carbon / carbon composite material) as the green body, and the carbon phase and copper phase are respectively connected in the form of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/08C22C121/00C22C101/10
Inventor 彭可周文艳易茂中冉丽萍葛毅成
Owner CENT SOUTH UNIV
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