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Preparation method for graphene oxide doped reinforced ODS copper

A technology of graphene and graphene dispersion liquid, which is applied in the field of preparation of copper-based composite materials, can solve problems such as large differences in strength increase range, and achieve the effects of improving processing performance, increasing strength, and good dispersion effect

Active Publication Date: 2018-07-06
阿尔泰新材料(香河)有限公司
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

Chinese invention patent application CN 105714138A discloses a method for preparing graphene-reinforced copper-based composite materials. In this invention, graphene oxide is used as a precursor to prepare graphene-reinforced pure copper-based composite materials, and its electrical conductivity is improved compared with pure copper. , but only using graphene as a reinforcement relative to the strength of the copper matrix is ​​much different than that of ODS copper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) get 200ml graphene oxide concentration and be the graphene oxide dispersion liquid (dispersant is ethanol) of 1mg / ml, it is uniformly mixed with 10g water atomization Cu-Al alloy powder, and Al content is 0.1wt.%, guarantees Cu-Al alloy powder is completely infiltrated by graphene oxide dispersion;

[0018] (2) Magnetically stir the mixed slurry for 5 hours, then raise the temperature of the water bath to 45°C to volatilize the dispersant liquid under magnetic stirring conditions, and vacuum-dry the obtained mixed powder at 40°C;

[0019] (3) The dried composite powder is subjected to cold isostatic pressing, the molding pressure is 70MPa, and the holding time is 150s;

[0020] (4) Diffusion of the obtained green body under vacuum conditions at 825°C for 8 hours, then raise the temperature to 1000°C, -1 The graphene-reinforced ODS copper composite was obtained after sintering for 1.5h under the vacuum condition of Pa. Finally, the composite material was further de...

Embodiment 2

[0022] (1) Get 200ml graphene oxide concentration and be the graphene oxide dispersion liquid (dispersant is ethanol) of 1.5mg / ml, it is uniformly mixed with 30g gas-atomized Cu-Al alloy powder, and the content of Al is 0.6wt.% , to ensure that the Cu-Al alloy powder is completely infiltrated by the graphene oxide dispersion;

[0023] (2) Magnetically stir the mixed slurry for 5 hours, then raise the temperature of the water bath to 45°C to volatilize the dispersant liquid under magnetic stirring conditions, and vacuum-dry the obtained mixed powder at 40°C;

[0024] (3) The dried composite powder is molded, the molding pressure is 600MPa, and the holding time is 5s;

[0025] (4) The obtained green body was subjected to oxygen diffusion under vacuum conditions at 500°C for 12h, then the temperature was raised to 800°C, and sintered in a hydrogen atmosphere for 3h to obtain a graphene-reinforced ODS copper composite material. Finally, the composite material was further densifie...

Embodiment 3

[0027] (1) getting 750ml graphene oxide concentration is the graphene oxide dispersion liquid (dispersant is ethanol) of 1mg / ml, it is uniformly mixed with 50g water atomized Cu-Al alloy powder, and the content of Al is 1.0wt.%, Ensure that the Cu-Al alloy powder is completely infiltrated by the graphene oxide dispersion;

[0028] (2) Magnetically stir the mixed slurry for 5 hours, then raise the temperature of the water bath to 45°C to volatilize the dispersant liquid under magnetic stirring conditions, and vacuum-dry the obtained mixed powder at 40°C;

[0029] (3) The dried composite powder is subjected to cold isostatic pressing, the molding pressure is 300MPa, and the holding time is 30s;

[0030] (4) Oxygen diffusion was carried out on the obtained green body under vacuum conditions of 1000°C for 4 hours, and then the temperature was raised to 1050°C. -3 The graphene-enhanced ODS copper composite was obtained after sintering for 3 h under the vacuum condition of Pa. Fin...

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Abstract

The invention provides a preparation method for graphene oxide doped reinforced ODS copper, and belongs to the technical field of preparation of copper-based composite materials. Atomized Cu-Al alloypowder serves as raw materials, graphene oxide is doped, oxygen is introduced, and diffusion bonding with Al in a substrate occurs to form Al2O3 nanometer particles which are uniformly dispersed in the substrate. Meanwhile, graphene losing oxygen-containing functional groups serves as a second reinforced phase to be dispersed in the substrate, a powder metallurgy technology and later plastic processing are combined to obtain compact graphene doped reinforced ODS copper composite materials with high strength and good processing performance. The strength of the Cu-based composite materials is improved, and the conduction performance of the Cu-based composite materials is guaranteed. By adding the graphene, the problem that traditional ODS copper is difficult to process is solved, and the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of doped graphene oxide reinforced ODS copper, which belongs to the technical field of preparation of copper-based composite materials. technical background [0002] Alumina (Al 2 o 3 ) Dispersion strengthened (ODS) copper not only has high strength at room temperature and high temperature, but also has good resistance to high temperature softening, arc erosion and wear resistance. Although the strength and high temperature stability of ODS copper are lower than those of Al 2 o 3 The content increases and increases, but its conductivity and processing properties will be weakened accordingly. Currently, the production of Al 2 o 3 The main method of dispersion strengthening copper alloy is internal oxidation method. Chinese invention patent CN 105838911A discloses a method for preparing alumina dispersion strengthened copper, using Cu 2 Oxygen in O as an oxygen source combines with Al in Cu-Al alloy p...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C9/01C22C32/00
Inventor 陈存广纪庆竹郭志猛李沛常永勤陆天行
Owner 阿尔泰新材料(香河)有限公司
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