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Method for preparing graphene oxide alloy aluminium-based surface wear-resisting layer by laser cladding

A laser cladding and wear-resistant layer technology, which is applied in the coating process and coating of metal materials, can solve the problems of lack of surface cladding technology for graphene oxide-enhanced aluminum-based materials, high powder waste, and great human injury , to achieve the effect of reducing delamination, improving surface hardness and low risk factor

Active Publication Date: 2019-01-01
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, due to the limitations of electroless plating, this method is more harmful to the human body, and it also needs to carboxylate graphene separately, which has a long production cycle. At the same time, it uses the powder spraying sintering method, which has a high degree of waste for this type of powder and has certain limitations
[0008] Therefore, there is still a lack of a cost-effective cladding technology for graphene oxide-reinforced aluminum-based materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Graphene oxide was ultrasonically pre-dispersed in analytical pure ethanol for 1 h, the temperature was at room temperature, and no water vapor was controlled throughout the process. The proportioning ratio is strictly controlled at 0.2g: 50ml, and then the resulting dispersion is poured into a precursor solution consisting of glycerol and tetraisopropyl titanate, sealed and ultrasonically treated for 1 hour. Among them, the volume ratio of glycerol and tetraisopropyl titanate is 10:0.4. Afterwards, hydrothermal treatment is carried out, wherein the volume of the suspension accounts for 50% of the volume of the reactor. Then put it into the reaction furnace to heat, raise the temperature to 90°C at 5°C / min, keep it for 2h, then raise the temperature to 180°C at 3°C / min, and keep it for 10h. Cool in air after taking out the reactor. The resulting solution was taken out, centrifuged, and centrifuged several times by pouring analytical pure ethanol until the solution was...

Embodiment 2

[0032] Graphene oxide was ultrasonically pre-dispersed in analytical pure ethanol for 3 hours, the temperature was at room temperature, and no water vapor was controlled throughout. The volume ratio was strictly controlled at 0.2:50, and then the resulting dispersion was poured into a precursor solution consisting of glycerol and tetraisopropyl titanate, sealed and sonicated for 1 hour. Among them, the volume ratio of glycerol and tetraisopropyl titanate is 10:0.8. Afterwards, hydrothermal treatment is carried out, wherein the volume of the suspension accounts for 50% of the volume of the reactor. Then put it into the reaction furnace to heat, raise the temperature to 90°C at 3°C / min, keep it for 1h, then raise the temperature to 180°C at 2°C / min, and keep it for 12h. Cool in air after taking out the reactor. The resulting solution was taken out, centrifuged, and centrifuged several times by pouring analytical pure ethanol until the solution was colorless. The whole process...

Embodiment 3

[0035] Graphene oxide was ultrasonically pre-dispersed in analytical pure ethanol for 2 hours, the temperature was at room temperature, and no water vapor was controlled throughout. The volume ratio was strictly controlled at 0.4:50, and then the resulting dispersion was poured into a precursor solution consisting of glycerol and tetraisopropyl titanate, sealed and sonicated for 1 hour. Among them, the volume ratio of glycerol and tetraisopropyl titanate is 10:0.4. Afterwards, hydrothermal treatment is carried out, wherein the volume of the suspension accounts for 60% of the volume of the reactor. Then put it into the reaction furnace to heat, raise the temperature to 100°C at 1°C / min, keep it for 2h, then raise the temperature to 180°C at 3°C / min, and keep it for 10h. Cool in air after taking out the reactor. The resulting solution was taken out, centrifuged, and centrifuged several times by pouring analytical pure ethanol until the solution was colorless. The whole proces...

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Abstract

The invention discloses a method for preparing a graphene oxide alloy aluminium-based surface wear-resisting layer by laser cladding. In a no-water environment, hydrothermal high pressure is utilized,Ti ions are adsorbed under action of a functional group of graphene oxide, and anatase type GO@TiO2 is obtained in later-stage roasting. The obtained powder, Ti powder and glycerol are regulated andmixed in certain proportion to obtain an adhesion-state powder mixture. Matrix aluminium is grinded by abrasive paper, and the adhesion-state powder mixture is uniformly smeared on the matrix surface.A flame gun is used for quickly and uniformly pre-sintering powder on the matrix surface. Laser cladding is utilized for processing the material. The aluminium-based surface cladding material is relatively small in friction coefficient, has high surface hardness, and the like. The method has the advantages of simpleness and safety, low cost, easy operation and control, and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation. Background technique [0002] Graphene nanosheets are one-atom-layer-thick two-dimensional materials composed of sp2 hybridized carbon atoms, which exhibit a series of unusual physical properties. Because of its special two-dimensional structure, graphene nanosheets have attracted great interest from researchers in physics, chemistry and materials science. Basic research and engineering application research on graphene have become a research hotspot in recent years. Due to the high strength of graphene, its tensile strength can reach 130GPa, implying that graphene has a huge application space in material application research. [0003] In fact, the research of using carbon materials such as carbon nanotubes or graphene to enhance the strength and other mechanical properties of aluminum-based materials has been going on and has achieved a certain degree of progress. However, due to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 闫洪吴庆捷
Owner NANCHANG UNIV
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