Unlock instant, AI-driven research and patent intelligence for your innovation.

Nickel-based alloy surface composite structure coating and preparation method thereof

A nickel-based alloy and surface composite technology, which is applied in metal material coating process, coating, vacuum evaporation plating, etc., can solve the complexity of the service environment of aerospace high-temperature components, reduce the bonding effect at the interface, and accelerate coating peeling and failure problems, to achieve excellent high-temperature mechanical properties and high-temperature oxidation resistance, improve thermal stability and bonding strength, and ensure the effect of lubrication and anti-friction

Active Publication Date: 2021-06-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, NiCoCrAlY as the bonding layer of nickel-based alloy and ceramic layer still faces some problems in service in high temperature environment
Jinlong Wang pointed out in the article "High temperature oxidation and interdiffusion behavior of recoated NiCoCrAlY coating on a nickel-based superalloy" in "Corrosion Science" No. 175 that in a high-temperature environment, when the Al content in the NiCoCrAlY adhesive layer is high, it will tend to the nickel-based alloy. Diffusion within the matrix, forming brittle phases and micropores at the interface between the bonding layer and the matrix, reducing the bonding effect at the interface
At the same time, during the preparation of the composite structural coating, a TGO layer (thermally grown oxide layer) will inevitably be formed at the interface between the bonding layer and the ceramic layer. Influence of 8YSZ Thermal Barrier Coating on Oxidation Resistance" points out that when the Al element of the NiCoCrAlY bonding layer is consumed, Al elements will be formed at the interface between the ceramic layer and the bonding layer 2 o 3 The main TGO layer, but if uneven oxidation occurs, NiO, Ni(Cr, Al) will be generated in local areas 2 o 4 and Al 2 o 3 Oxide, resulting in volume expansion and stress concentration, accelerating the peeling and failure of the coating
[0006] Due to the complexity and harshness of the service environment of aerospace high-temperature components, it is difficult to prepare conventional wear-resistant coatings on the surface of nickel-based alloys to overcome frictional failures from room temperature to high temperature environments, and it is urgent to improve the serviceability of nickel-based alloy workpieces

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nickel-based alloy surface composite structure coating and preparation method thereof
  • Nickel-based alloy surface composite structure coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation method for a nickel-based alloy surface composite structure coating, comprising the following steps:

[0044] (1) Cut the nickel-based alloy plate into 15mm×15mm×4mm massive nickel-based alloy substrate 1 by wire electric discharge cutting, use a metallographic pre-grinder to grind each surface to smooth through 80 mesh and 240 mesh sandpaper, and then Grind one side of the prepared coating until smooth with 400#, 800#, 1200#, 1500# sandpaper, polish it with 2.5 μm polishing paste, put it in absolute ethanol solution for ultrasonic cleaning and dry;

[0045] (2) The selected low Al content NiCoCrAlY alloy target composition mass percentage is: Ni 46.0%, Co23.5%, Cr 24.9%, Al 4.8%, Y 0.8%; the selected high Al content NiCoCrAlY alloy target composition mass percentage It is: Ni 37.6%, Co 22.7%, Cr 24.8%, Al 14.1%, Y 0.8%, the surface is polished with 01# sandpaper to remove scale, placed in absolute ethanol for ultrasonic cleaning and drying, placed in Shua...

Embodiment 2

[0057] A preparation method for a nickel-based alloy surface composite structure coating, comprising the following steps:

[0058] (1) Cut the nickel-based alloy plate into 15mm×15mm×4mm massive nickel-based alloy substrate 1 by wire electric discharge cutting, use a metallographic pre-grinder to grind each surface to smooth through 80 mesh and 240 mesh sandpaper, and then Grind one side of the prepared coating until smooth with 400#, 800#, 1200#, 1500# sandpaper, polish it with 2.5 μm polishing paste, put it in absolute ethanol solution for ultrasonic cleaning and dry;

[0059] (2) The selected low Al content NiCoCrAlY alloy target composition mass percentage is: Ni 46.0%, Co23.5%, Cr 24.9%, Al 4.8%, Y 0.8%; the selected high Al content NiCoCrAlY alloy target composition mass percentage It is: Ni 37.6%, Co 22.7%, Cr 24.8%, Al 14.1%, Y 0.8%, the surface is polished with 01# sandpaper to remove scale, placed in absolute ethanol for ultrasonic cleaning and drying, placed in Shua...

Embodiment 3

[0072] A preparation method for a nickel-based alloy surface composite structure coating, comprising the following steps:

[0073] (1) Cut the nickel-based alloy plate into 15mm×15mm×4mm massive nickel-based alloy substrate 1 by wire electric discharge cutting, use a metallographic pre-grinder to grind each surface to smooth through 80 mesh and 240 mesh sandpaper, and then Grind one side of the prepared coating until smooth with 400#, 800#, 1200#, 1500# sandpaper, polish it with 2.5 μm polishing paste, put it in absolute ethanol solution for ultrasonic cleaning and dry;

[0074] (2) The selected low Al content NiCoCrAlY alloy target composition mass percentage is: Ni 45.0%, Co24.0%, Cr 26.2%, Al 4.0%, Y 0.8%; the selected high Al content NiCoCrAlY alloy target composition mass percentage It is: Ni 37.3%, Co 23.0%, Cr 25.0%, Al 14.0%, Y 0.7%, use 01# sandpaper to polish the surface to remove scale, place it in absolute ethanol for ultrasonic cleaning and drying, and place it in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
friction coefficientaaaaaaaaaa
friction coefficientaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nickel-based alloy surface composite structure coating and a preparation method thereof. The coating comprises a nickel-based alloy matrix, a first bonding layer, a second bonding layer and a high-temperature solid self-lubricating coating which are sequentially connected, the first bonding layer and the second bonding layer are NiCoCrAlY bonding layers, and the Al content in the first bonding layer is lower than that in the second bonding layer. The preparation method comprises the following steps that the surface of the nickel-based alloy matrix is pretreated; the first bonding layer and the second bonding layer are prepared on the surface of the nickel-based alloy matrix through a double glow plasma surface metallurgy method; and the high-temperature solid self-lubricating coating is prepared on the surface of the NiCoCrAlY bonding layer through a multi-arc ion plating method. By means of the nickel-based alloy surface composite structure coating and the preparation method thereof, the bonding strength of the coating and the lubricating and anti-friction effects in a wide temperature range can be easily improved; and the double-layer NiCoCrAlY bonding layer is prepared on the surface layer of the nickel-based alloy matrix, and the coating is metallurgically bonded with the matrix, so that the bonding strength is higher.

Description

technical field [0001] The invention belongs to an alloy surface coating and a preparation method thereof, in particular to a nickel-based alloy surface composite structure coating and a preparation method thereof. Background technique [0002] Nickel-based alloys have excellent high-temperature strength, oxidation resistance, and corrosion resistance, and are widely used in high-temperature structural parts in aerospace, petrochemical, and navigation fields. With the rapid development of the aerospace industry, nickel-based alloy mechanical parts such as aero-engine high-pressure compressors, low-pressure turbine components, gears, bearing components, etc. Realizing good lubrication and anti-friction effects in high vacuum and wide temperature range, improving the wear resistance of nickel-based alloy parts and ensuring service life are problems that need to be solved urgently. [0003] YSZ ceramic coating (Y 2 o 3 Stabilized ZrO 2 Ceramic coating) has excellent high te...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/02C23C14/06C23C14/16
CPCC23C14/325C23C14/025C23C14/16C23C14/0688
Inventor 魏东博李民锋张平则李逢昆杨凯李淑琴姚正军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement