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Aluminum alloy surface wear-resisting coating and preparation method and application thereof

A technology of aluminum alloy surface and wear-resistant coating, which is applied in the direction of metal material coating process, coating, superimposed layer plating, etc. Problems such as failure to improve the bonding force of the matrix to achieve the effect of improving performance, excellent anti-friction and wear performance, and weakening the difference in mechanical properties

Active Publication Date: 2020-06-16
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, affected by the type, thickness and structural design of the transition layer, while the coating obtains low residual stress, it often significantly damages the overall toughness of the coating and the ability of the film base to coordinate deformation, resulting in a gap between the coating and the aluminum alloy substrate. The binding force has not been improved

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  • Aluminum alloy surface wear-resisting coating and preparation method and application thereof
  • Aluminum alloy surface wear-resisting coating and preparation method and application thereof
  • Aluminum alloy surface wear-resisting coating and preparation method and application thereof

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[0038] Another aspect of the embodiments of the present invention also provides a method for preparing a wear-resistant coating on an aluminum alloy surface, which includes:

[0039] Magnetron sputtering technology is used to deposit and form a titanium primer layer on the surface of the substrate under a protective atmosphere;

[0040] Using plasma-enhanced chemical vapor deposition technology, a mixed gas of acetylene and hexamethyldisiloxane is used as the working gas of the ion source of the anode layer, and a composite gradient transition layer is deposited on the surface of the titanium primer layer; wherein, the composite gradient The transition layer includes more than three silicon-oxygen-doped amorphous carbon transition layers with different silicon-oxygen contents formed in the thickness direction of the coating;

[0041] And, using plasma-enhanced chemical vapor deposition technology, acetylene is used as the working gas of the ion source of the anode layer, and a...

Embodiment 1

[0062] (1) Use plasma to etch and clean the surface of aluminum alloy (or silicon wafer, for microscopic morphology characterization) for 10 minutes to remove surface impurities and increase interface bonding strength to obtain a pretreated aluminum alloy surface, wherein the ion source of the anode layer The working gas is argon, the chamber pressure is 0.40Pa, the ion source constant current is 1A, the voltage is 1100V, and the substrate negative bias is -300V;

[0063] (2) Using DC magnetron sputtering technology, prepare a layer of Ti with a thickness of 800nm ​​on the surface of aluminum alloy (or silicon wafer), wherein the cavity pressure is 0.35Pa, and the magnetron sputtering constant current is 3A The emission voltage is 460V, and the deposition negative bias is -100V;

[0064] (3) Using plasma-enhanced chemical vapor deposition technology, using acetylene and hexamethyldisiloxane as the working gas of the ion source of the anode layer, a composite gradient transitio...

Embodiment 2

[0069] (1) Use plasma to etch and clean the aluminum alloy surface for 10 minutes to remove surface impurities and increase the interface bonding strength to obtain a pretreated aluminum alloy surface, wherein the working gas of the ion source of the anode layer is argon, and the chamber pressure is 0.35Pa , in the ion source constant current mode of 1A, the voltage is 1150V, and the base negative bias is -200V;

[0070] (2) Using DC magnetron sputtering technology, prepare a layer of Ti with a thickness of 500nm on the surface of the aluminum alloy, where the chamber pressure is 0.38Pa, the magnetron sputtering constant current is 3A, the sputtering voltage is 450V, The deposition negative bias is -150V;

[0071] (3) Using plasma-enhanced chemical vapor deposition technology, using acetylene and hexamethyldisiloxane as the working gas of the ion source of the anode layer, a composite gradient transition layer with a total thickness of 200nm was prepared on the Ti primer layer...

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Abstract

The invention discloses an aluminum alloy surface wear-resisting coating and a preparation method and application thereof. The coating comprises a titanium bottom layer, a composite gradient transition layer and an amorphous carbon surface layer, all of which are sequentially formed on the surface of a matrix. The composite gradient transition layer comprises three or more silica doped amorphous carbon transition layers which are different in silica content and are formed in the thickness direction of the coating. According to the coating, through the characteristics that the titanium bottom layer is used for coordinating substrate plastic deformation, the composite gradient transition layer is used for reducing stress, and the amorphous carbon surface layer is used for providing high hardness and wear resistance, the adhesive strength between a base material and the coating is obviously improved, wear resistance of an aluminum alloy material is improved, and the service life of the aluminum alloy material is prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a wear-resistant coating on an aluminum alloy surface and a preparation method and application thereof. Background technique [0002] Aluminum alloy has the advantages of low density, high specific strength, easy processing, and good decorative effect. It has gradually become the material of choice for lightweight industrial products, and has broad application prospects in aerospace, rail transit, construction, and biomedicine. However, with the continuous development of science and technology, the requirements for the surface functionality of aluminum alloys are also increasing. Due to the limitations of low hardness, poor wear resistance, and insufficient corrosion resistance, its use is facing severe challenges. DLC is a class of diamond structures (sp 3 hybrid bond) and graphitic structure (sp 2 Hybrid bond) metastable amorphous coating material, compa...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/16C23C16/26C23C16/50C23C16/455C23C28/00
CPCC23C14/35C23C14/165C23C16/26C23C16/50C23C16/455C23C28/322C23C28/343
Inventor 汪爱英周佳孙丽丽郭鹏李晓伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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