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Preparation method of graphene oxide doped tungsten-copper core-shell structure material

A core-shell structure, graphene technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problem of difficult to obtain microstructure and properties, complex preparation process by co-reduction method, poor wettability of tungsten-copper interface, etc. problems, to achieve the effect of reducing temperature, improving interface wettability, and improving mechanical properties

Active Publication Date: 2021-06-25
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of tungsten-copper alloy by powder sintering method faces two problems: one is that due to the incompatibility of the two components, the wettability of the tungsten-copper interface is poor, and it is difficult to be dense during the sintering process, and it is difficult to obtain ideal microstructure and properties; two. How to obtain uniformly mixed tungsten-copper mixed powder mainly includes ball milling method and tungsten-copper oxide co-reduction method, but the ball milling method will introduce a large amount of impurities, and the preparation process of co-reduction method is relatively complicated

Method used

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  • Preparation method of graphene oxide doped tungsten-copper core-shell structure material
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  • Preparation method of graphene oxide doped tungsten-copper core-shell structure material

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Embodiment 1

[0037] This embodiment includes the following steps:

[0038] Step 1. Add 50g of tungsten powder and 0.2g of graphene oxide into 200mL of deionized water respectively, and then perform stirring and ultrasonic treatment in turn to obtain tungsten powder dispersion and graphene oxide dispersion; the particle size of the tungsten powder is 20nm~ 5μm;

[0039] Step 2, stirring the tungsten powder dispersion obtained in step 1, then adding dropwise the graphene oxide dispersion obtained in step 1 to obtain a tungsten powder / graphene oxide dispersion;

[0040] Step 3: Add 62g of copper acetate to 200mL of deionized water, then add 100mL of ammonia water, and then perform ultrasound to obtain an activation solution;

[0041] Step 4. Add the tungsten powder / graphene oxide dispersion liquid obtained in step 2 to the activation solution obtained in step 3 dropwise under the conditions of water bath and stirring to obtain a reaction solution; the temperature of the water bath is 45 ℃, ...

Embodiment 2

[0063] This embodiment includes the following steps:

[0064] Step 1. Add 50g of tungsten powder and 0.5g of graphene oxide into 200mL of deionized water respectively, and then perform stirring and ultrasonic treatment in turn to obtain a tungsten powder dispersion and a graphene oxide dispersion; the particle size of the tungsten powder is 1 μm~ 5μm;

[0065] Step 2, stirring the tungsten powder dispersion obtained in step 1, then adding dropwise the graphene oxide dispersion obtained in step 1 to obtain a tungsten powder / graphene oxide dispersion;

[0066] Step 3: Add 78g of copper acetate to 200mL of deionized water, then add 100mL of ammonia water, and then perform ultrasound to obtain an activation solution;

[0067] Step 4: Add the tungsten powder / graphene oxide dispersion obtained in step 2 to the activated solution obtained in step 3 dropwise under the conditions of water bath and stirring to obtain a reaction solution; the temperature of the water bath is 80 ℃, the ...

Embodiment 3

[0072] This embodiment includes the following steps:

[0073]Step 1. Add 50g of tungsten powder and 0.05g of graphene oxide into 200mL of deionized water respectively, and then perform stirring and ultrasonic treatment in turn to obtain tungsten powder dispersion and graphene oxide dispersion; the particle size of the tungsten powder is 20nm~ 1μm;

[0074] Step 2, stirring the tungsten powder dispersion obtained in step 1, then adding dropwise the graphene oxide dispersion obtained in step 1 to obtain a tungsten powder / graphene oxide dispersion;

[0075] Step 3: Add 47g of copper acetate to 200mL of deionized water, then add 100mL of ammonia water, and then perform ultrasound to obtain an activation solution;

[0076] Step 4, the tungsten powder / graphene oxide dispersion liquid obtained in step 2 is under the condition of water bath and stirring, the activation solution obtained in step 3 is added dropwise to react, and the reaction solution is obtained; the temperature of th...

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Abstract

The invention discloses a preparation method of a graphene oxide doped tungsten-copper core-shell structure material. The preparation method comprises the following steps: 1, preparing a tungsten powder dispersion liquid and a graphene oxide dispersion liquid from tungsten powder and graphene oxide; 2, adding the graphene oxide dispersion liquid into the tungsten powder dispersion liquid; 3, preparing an activation solution from copper acetate, deionized water and ammonia water; 4, dropwise adding the activated solution into the tungsten powder / graphene oxide dispersion liquid; 5, carrying out filtering, washing and vacuum drying on a reaction liquid; and 6, performing spark plasma sintering on the graphene oxide doped tungsten-copper core-shell structure powder to obtain the graphene oxide doped tungsten-copper core-shell structure material. According to the graphene oxide doped tungsten-copper core-shell structure material and the preparation method thereof, through in-situ chemical plating, the purpose that the surfaces of tungsten powder particles are evenly coated with nano-copper particles and the graphene oxide is doped is achieved, and the obtained graphene oxide doped tungsten-copper core-shell structure material is a nanocrystalline composite material and has the advantages of being excellent in interface wettability, high in mechanical property, good in heat-conducting property and high in density.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of graphene oxide doped tungsten-copper core-shell structure material. Background technique [0002] Tungsten-copper alloy combines the advantages of two components of tungsten and copper. It not only has the characteristics of high temperature resistance, high strength, high density, and arc corrosion resistance of tungsten, but also has excellent properties such as high electrical and thermal conductivity and excellent plasticity of copper. It is widely used It is used in the fields of electrical contact materials, electronic packaging materials, armor-breaking materials and nuclear fusion materials. With the rapid development of the electronics industry and other high-tech fields, the application of tungsten-copper alloys has become more and more extensive. At the same time, higher requirements have been put forward for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F3/105
CPCB22F3/105B22F2003/1051B22F1/17Y02E30/10
Inventor 张剑峰潘晓龙张于胜
Owner 西安稀有金属材料研究院有限公司
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