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Al/NiCrAlY/Al2O3 compound coating, preparing method and application thereof

A composite coating and coating technology, applied in the coating, metal material coating process, ion implantation plating and other directions, can solve the problems of low bonding force and high stress of the coating

Active Publication Date: 2020-07-07
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of the metal Al transition layer in the NiCrAlY coating system causes problems such as low adhesion and high stress in the coating, which restricts the application of the coating in parts such as engine blades.

Method used

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  • Al/NiCrAlY/Al2O3 compound coating, preparing method and application thereof
  • Al/NiCrAlY/Al2O3 compound coating, preparing method and application thereof
  • Al/NiCrAlY/Al2O3 compound coating, preparing method and application thereof

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preparation example Construction

[0027] An Al / NiCrAlY / Al provided by the embodiment of the present invention 2 O 3 The preparation method of the composite coating, including:

[0028] Al layer and NiCrAlY layer are sequentially deposited on the workpiece by multi-arc ion plating technology to form Al / NiCrAlY layer;

[0029] Al formation on the surface of Al / NiCrAlY layer by heat treatment 2 O 3 coating to obtain the Al / NiCrAlY / Al 2 O 3 Composite coating.

[0030] In some specific embodiments, Al / NiCrAlY / Al 2 O 3 The preparation method of the composite coating, including:

[0031] The workpiece is placed in the vacuum chamber of the coating equipment, and the Al layer and the NiCrAlY coating are sequentially deposited on the workpiece by the multi-arc ion plating technology until the Al / NiCrAlY layer is formed. and self-formed Al on the surface of Al / NiCrAlY layer by subsequent heat treatment 2 O 3 coating.

[0032] In some embodiments, the process conditions used for depositing the Al layer includ...

Embodiment 1

[0061] The embodiment of the present invention provides an Al / NiCrAlY / Al 2 O 3 Composite coating, the composite coating is deposited alternately with Al layer and NiCrAlY layer on the surface of the workpiece, and self-forms Al on the surface of the composite coating through subsequent heat treatment 2 O 3 coating. The thickness of the Al layer is about 0.4 μm. The thickness of the Al / NiCrAlY composite coating is about 5 μm.

[0062] The Al / NiCrAlY / Al 2 O 3 Composite coatings can be prepared as follows:

[0063] (1) Cleaning, degreasing and surface activation of the workpiece surface. Firstly, the workpiece is ultrasonically cleaned and degreasing with solvents such as ethanol and acetone, and the sample is cleaned more than 2 times until it is cleaned. Then put it into the vacuum chamber of the coating equipment at 180 ℃ ~ 210 ℃, and perform surface activation treatment on the workpiece. Argon gas was used for the surface activation treatment of the workpiece, wherei...

Embodiment 2

[0075] The embodiment of the present invention provides an Al / NiCrAlY / Al 2 O 3 Composite coating, the composite coating is deposited alternately with Al layer and NiCrAlY layer on the surface of the workpiece, and self-forms Al on the surface of the composite coating through subsequent heat treatment 2 O 3 coating. The thickness of the Al layer is about 0.4 μm. The thickness of the Al / NiCrAlY composite coating is about 8 μm.

[0076] The Al / NiCrAlY / Al 2 O 3 Composite coatings can be prepared as follows:

[0077] (1) Cleaning, degreasing and surface activation of the workpiece surface. Firstly, the workpiece is ultrasonically cleaned and degreasing with solvents such as ethanol and acetone, and the sample is cleaned more than 2 times until it is cleaned. Then put it into the vacuum chamber of the coating equipment at 180 ℃ ~ 210 ℃, and perform surface activation treatment on the workpiece. Argon gas was used for the surface activation treatment of the workpiece, wherei...

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Abstract

The invention discloses an Al / NiCrAlY / Al2O3 compound coating which comprises an Al layer, a NiCrAlY layer and an Al2O3 coating. The NiCrAlY layer and the Al2O3 coating are sequentially formed on the Al layer. The invention further discloses a preparing method of the Al / NiCrAlY / Al2O3 compound coating. The preparing method includes the steps that the Al layer and the NiCrAlY layer are sequentially deposited on a workpiece through a multi-arc ion plating technology, and an Al / NiCrAlY layer is formed; and heat treatment is conducted, an Al2O3 coating is formed on the surface of the Al / NiCrAlY layer, and the Al / NiCrAlY / Al2O3 compound coating is obtained. The prepared Al / NiCrAlY / Al2O3 compound coating has the good high-temperature oxidation resisting performance, damp and heat resisting performance and salt spray resisting performance and is suitable for surface protection of high-temperature and ocean environment key parts. In addition, the preparing method of the Al / NiCrAlY / Al2O3 compoundcoating is simple and easy to implement, and a very good application prospect is achieved.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, in particular to an Al / NiCrAlY / Al 2 O 3 Composite coating, its preparation method and application. Background technique [0002] As the bonding layer of thermal barrier coating, NiCrAlY coating has excellent high temperature oxidation resistance, corrosion resistance, wear resistance and mechanical properties. wear and erosion, and provide lubrication and thermal insulation. However, during the long-term service of the coating, the heated parts, such as the flame tube and the blade, not only have high working temperature, but also withstand thermal shock caused by drastic changes in temperature, and cracks and peeling will occur on the surface of the coating. The service life is greatly reduced. To ensure sufficient life, high temperature materials such as nickel-based and cobalt-based alloys must be used in these two components. [0003] In addition, the high friction coe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/16C23C14/58
CPCC23C14/325C23C14/16C23C14/5806Y02E60/50
Inventor 李金龙任雪茹董敏鹏徐路峰马付良邱佳琳苏子宽段佳妮
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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