NiMA1Y/Al2O3 composite coating and preparation method thereof and application thereof

A composite coating, alloy target technology, applied in the coating, metal material coating process, vacuum evaporation plating and other directions, can solve the problems of poor mechanical properties, bonding force, peeling, etc., to improve performance and high controllability , the effect of simple preparation process

Pending Publication Date: 2020-08-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

But due to pure Al 2 o 3 The mechanical properties and bonding force of the coating are very poor, and severe peeling will gradually occur during the hot corrosion process, so it is necessary to add a NiAl system coating to strengthen the mechanical properties of the coating and the bonding force with the substrate. Pure Al cannot be used 2 o 3 as a protective coating

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  • NiMA1Y/Al2O3 composite coating and preparation method thereof and application thereof
  • NiMA1Y/Al2O3 composite coating and preparation method thereof and application thereof
  • NiMA1Y/Al2O3 composite coating and preparation method thereof and application thereof

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[0030] Another aspect of the embodiments of the present invention also provides a NiMAlY / Al 2 O 3 The preparation method of the composite coating includes:

[0031] Using physical vapor deposition technology, NiMAlY alloy target and Al target are used as target materials, inert gas is used as working gas, target current is applied to the NiMAlY alloy target and Al target, and bias is applied to the substrate, thereby sequentially depositing on the surface of the substrate. NiMAlY layer and Al layer, wherein M is selected from any one of Cr, Si, and Pt;

[0032] And, pre-oxidizing the Al layer to form Al 2 O 3 Layer to obtain NiMAlY / Al 2 O 3 Composite coating.

[0033] Further, the preparation method includes: using any one of multi-arc ion plating technology, magnetron sputtering technology, vapor deposition technology, and atomic layer deposition technology to sequentially deposit NiMAlY layer and Al layer on the surface of the substrate. .

[0034] In some more specific embodiments...

Embodiment 1

[0058] A NiSiAlY / Al 2 O 3 Composite coating, its thickness is 9μm, NiSiAlY layer thickness is 6μm, Al 2 O 3 The layer thickness is 3μm. The NiSiAlY / Al 2 O 3 The composite coating can be prepared according to the following steps:

[0059] (1) Cleaning, degreasing and surface activation of the cost surface. First, use solvents such as ethanol and acetone to ultrasonically clean and degrease the GH4169 superalloy workpiece. Put the cleaned sample into the coating equipment, apply a vacuum environment, and keep the temperature at 180°C. The surface of the workpiece needs to be activated by argon, the gas flow is 500sccm, and the negative bias voltage of ion etching is 900V, 1100V and 1200V. Each etching time is 2min.

[0060] (2) The pretreated workpiece is prepared with a multi-arc ion plating method to prepare a composite coating. The target material for depositing the NiSiAlY layer is a NiSiAlY alloy target, and the target composition includes 84wt% Ni, 2.5wt% Si, 12wt% Al, 1.5wt...

Embodiment 2

[0065] A NiSiAlY / Al 2 O 3 Composite coating, its thickness is 8μm, NiSiAlY layer thickness is 6μm, Al 2 O 3 The layer thickness is 2μm. The NiSiAlY / Al 2 O 3 The composite coating can be prepared according to the following steps:

[0066] (1) Cleaning, degreasing and surface activation of the cost surface. First, use solvents such as ethanol and acetone to ultrasonically clean and degrease the GH4169 superalloy workpiece. Put the cleaned sample into the coating equipment, apply a vacuum environment, and keep the temperature at 210°C, the surface of the workpiece needs to be activated by argon, the gas flow is 500sccm, and the negative bias voltage of ion etching is 900V, 1100V and 1200V. Each etching time is 2min.

[0067] (2) The pretreated workpiece is prepared with a multi-arc ion plating method to prepare a composite coating. The target material for depositing the NiSiAlY layer is a NiSiAlY alloy target, and the target material includes 84wt% Ni, 2.5wt% Si, 12wt% Al, and 1.5w...

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Abstract

The invention discloses a NiMA1Y/Al2O3 composite coating and a preparation method thereof and an application thereof. The NiMAlY/Al2O3 composite coating comprises a NiMA1Y layer and an Al2O3 layer which are formed on the surface of a base body in sequence; the NiMA1Y layer comprises 82-84 wt% Ni, 1-10 wt% M, 12-24 wt% Al and 0.5-1.5 wt% Y; and the Al2O3 layer mainly consists of alpha-Al2O3, wherein M comprises any one or a combination of two or more than two elements from elements of Cr, Si and Pt. The preparation method comprises the steps of using a NiMAlY target and an Al target as target materials and using inert gas as working gas to apply target current to a NiMAlY alloy target and the Al target and apply bias voltage to the base body by using a physical vapor deposition technology so as to deposit the NiMAlY alloy target and the Al target on the surface of the base body in sequence to form a NiMAlY layer and an Al layer; and then carrying out pre-oxidation treatment on the Al layer to form an Al2O3 layer so as to obtain the NiMA1Y/Al2O3 composite coating. The composite coating prepared by the preparation method has the advantages of excellent high temperature resistance property, heat and humidity resistance and heat and salt corrosion resistance and is suitable for being applied to surface protection of equipment key parts in severe environments, such as high temperature, heat salt and special mediums, involved in aerospace and marine environments.

Description

Technical field [0001] The invention belongs to the technical field of surface treatment, and specifically relates to a NiMAlY / Al 2 O 3 Composite coating and its preparation method and application. Background technique [0002] In the aerospace and navigation environment, the service environment of ships and aircraft is becoming more and more demanding. Parts of engine compressor blades that are often exposed to harsh conditions such as high salt and high temperature are extremely vulnerable to severe corrosion, thereby reducing the service life of aircraft engines. . [0003] The Al in the common NiAl system coating will accelerate the reaction with NaCl at high temperature, thereby accelerating the corrosion of the coating, but Al 2 O 3 No, and dense Al 2 O 3 It will prevent oxygen and corrosive substances from further spreading deep into the coating. Pre-oxidizing the coating can effectively improve the corrosion resistance of the coating. But due to pure Al 2 O 3 The mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/16C23C14/02C23C14/58C22C19/03C22C19/05
CPCC23C14/325C23C14/16C23C14/022C23C14/5853C22C19/03C22C19/058
Inventor 王立平崔天铖李金龙周大朋
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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