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Preparation method of graphene-copper-amorphous composite coating

A composite coating, graphene technology, applied in the direction of coating, metal material coating process, metal processing equipment, etc., to achieve the effect of reducing the amount of wear, reducing the coefficient of friction, and improving the quality

Active Publication Date: 2017-11-17
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are limitations in improving the wear resistance of amorphous coatings only by adding ductile metals.

Method used

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  • Preparation method of graphene-copper-amorphous composite coating
  • Preparation method of graphene-copper-amorphous composite coating
  • Preparation method of graphene-copper-amorphous composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 adopts atomization method to prepare graphene-copper composite powder

[0041] The embodiment of the present invention adopts the following technical conditions

[0042](1) The mass ratio of sodium carboxymethyl cellulose and deionized water is 1:1000 in a water bath, heated at 95° C. and mechanically stirred for about one hour until viscous, and the binder is obtained.

[0043] (2), according to the composite powder of copper powder and graphene oxide powder, metal powder accounts for 98wt.%, and graphene oxide powder accounts for the ratio of 2wt.%, weigh copper powder and graphene oxide powder. Taking the sum of the graphene powder and the copper powder quality as the total mass of the powder, the binder prepared by (1) is 50% of the total mass of the powder, the dispersant accounts for 1.5% of the total mass of the powder, and the mass of deionized water is A slurry was prepared for 130% by mass of all powders. Among them, the dispersant is sodium pol...

Embodiment 2

[0048] Example 2 The other steps of the method for preparing graphene-copper composite powder in this example are the same as in Example 1, except that the ratio of graphene to copper powder is different in this example. In the composite powder of copper powder and graphene oxide powder, the metal powder accounts for 95wt.%, and the graphene oxide powder accounts for 5wt.%. The obtained composite powder is spherical in shape. The D and G peaks of graphene can be detected by Raman spectroscopy.

Embodiment 3

[0049] Example 3 The substrate is 45# steel, and a graphene-copper complex-iron-based amorphous composite coating is prepared by plasma spraying technology.

[0050] In the present invention, the graphene-copper composite powder in Example 1 is used as one of the spraying feed powders and mixed with the amorphous powder to obtain the mixed feed powder.

[0051] The first step is to prepare graphene-copper-iron-based amorphous mixed feed powder

[0052] The weight ratio of graphene-copper composite powder and iron-based amorphous powder is 1:19, and the two powders are mechanically mixed for 4 hours to obtain graphene-copper-iron-based amorphous mixed feed powder. The iron-based amorphous powder is a commercially available product, and its composition is: Cr: 25%-27%, C: 2%-2.5%, Mo: 16%-18%, B: 2%-2.2%, and the balance It is Fe, the above ratios are all percentages by mass, and the powders are all spherical or nearly spherical particles with a particle size of 10-70 μm.

[0...

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Abstract

The invention provides a preparation method of a graphene-copper-amorphous composite coating. The preparation method comprises the following steps that graphene-copper composite powder is prepared; graphene-copper-amorphous composite powder is prepared; the graphene-copper-amorphous composite coating is prepared on the surface of a workpiece through the hot spraying technology by taking the composite powder as composite feeding powder for spraying; according to the hot spraying process, the surface of a workpiece substrate is subjected to cleaning pretreatment firstly, then sand blasting is conducted, spraying is conducted through the hot spraying technology, and a bonding coating which is 80-120 microns thick is obtained; and finally, spraying is conducted on the surface of the sample treated in the last step through the hot spraying technology, and the graphene-copper-amorphous composite coating is obtained. The grain size of the graphene-copper composite powder is 10-100 microns. The friction coefficient of the composite coating is reduced by 37.5% compared with that of a single amorphous coating. The abrasion resistance of the composite coating is improved, and the abrasion weight loss of the composite coating can be reduced by 57.8% compared with that of the single amorphous coating.

Description

technical field [0001] The invention belongs to the field of material surface coating preparation, in particular to a method for preparing composite powder required for a composite coating, and to the technical field of graphene. technical background [0002] Amorphous alloy is a long-range disordered structure obtained by ultra-rapid solidification. There are no grains and grain boundaries of crystalline alloys. The structure of amorphous alloys determines that it has unique magnetic properties, mechanical properties, electrical properties, and corrosion resistance. Wait. The use of amorphous alloy as a coating material in the field of material surface technology can play a very good role in protection. Chu Zhenhua et al. (Surface and Coatings Technology, 2016, 292(25): 44-48.) pointed out that iron-based amorphous coating can greatly improve the wear resistance of 45# steel substrate. However, as far as the amorphous coating is concerned, the coating exhibits brittle pee...

Claims

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Application Information

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IPC IPC(8): C23C4/067C23C4/134C23C4/131C23C4/129B22F1/00
CPCC23C4/067C23C4/129C23C4/131C23C4/134B22F1/142
Inventor 褚振华魏福双杨勇相瑞董艳春陈学广王磊阎殿然何继宁张春月
Owner HEBEI UNIV OF TECH
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