Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thermal barrier coating with two bonding layers and preparation method of thermal barrier coating

A thermal barrier coating and bonding layer technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problem of not improving the bonding layer's ability to alleviate thermal expansion mismatch, The ability of matching has not improved, so as to achieve the effect of improving lifespan, alleviating thermal expansion mismatch, and reducing weight.

Active Publication Date: 2016-11-16
XI'AN PETROLEUM UNIVERSITY
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the first adhesive layer is relatively dense, compared with the traditional single-layer adhesive layer, the ability of the adhesive layer with this structure to alleviate thermal expansion mismatch is not improved, that is, the ability of the adhesive layer to alleviate thermal expansion mismatch cannot be improved.

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
  • Thermal barrier coating with two bonding layers and preparation method of thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 As shown, in this embodiment, two bonding layers with different structures are deposited on the superalloy substrate 1: the first layer of bonding layer (porous layer) and the second layer of bonding layer (dense layer), and in the dense layer A ceramic layer is deposited on the surface.

[0027] In the present embodiment, the composition of the two bonding layers is NiCoCrAlTaY, and the composition of the surface ceramic layer 4 is 8wt%Y 2 o 3 Stable ZrO 2 (8YSZ).

[0028] In this embodiment, the material of the superalloy substrate 1 is nickel-based superalloy IN738.

[0029] In this embodiment, the thickness of the first bonding layer 2 (porous layer) is 75 μm, the thickness of the second bonding layer 3 (dense layer) is 75 μm, and the thickness of the ceramic layer is 250 μm.

[0030] to combine figure 1 , a method for preparing a thermal barrier coating with a double-layer bonding layer, comprising the steps of:

[0031] Step 1, use coarse s...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a thermal barrier coating with two bonding layers. The thermal barrier coating comprises a high-temperature alloy matrix, wherein a first bonding layer, a second bonding layer and a surface ceramic layer are deposited above the matrix in sequence; and the first bonding layer is of a multiporous laminated structure, and the second bonding layer is of a compact structure. A preparation method of the thermal barrier coating comprises the following steps: (1) grinding and performing sand blasting treatment on the surface of the high-temperature alloy matrix; (2) depositing a porous layer, which is the first bonding layer, with the porosity of 10 to 30 percent on the surface of the matrix by adopting gas shield protection plasma spraying; (3) depositing a compact layer, which is the second bonding layer, on the surface of the porous layer by adopting hypersonic flame spraying, low-pressure plasma spraying or cold spraying; and (4) depositing the surface ceramic layer on the surface of the second bonding layer by adopting atmospheric plasma spraying. The thermal barrier coating with the two bonding layers can both ensure that alpha-Al2O3 is continuously generated on the surfaces of the bonding layers and further relieve thermal expansion mismatch between the matrix and the ceramic layer, so that the service life of the thermal barrier coating is prolonged.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a thermal barrier coating with a double-layer structure bonding layer and a preparation method thereof. Background technique [0002] Thermal barrier coating is a functional coating that coats high-melting-point materials with low thermal conductivity on the surface of high-temperature components for heat insulation. The temperature of the components can effectively improve the efficiency of the gas turbine. In recent years, the rapid development of plasma sprayed thermal barrier coatings has effectively improved the efficiency of gas turbines. However, the failure of thermal barrier coatings caused by the shedding of ceramic layers has seriously hindered the development and application of thermal barrier coatings. [0003] There are many factors affecting the life of thermal barrier coatings, among which the two most important factors are: TGO growth and the therma...

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): C23C4/073C23C4/11C23C4/134C23C4/129C23C4/02
CPCC23C4/02
Inventor 董会姚建洮李光周勇李霄
Owner XI'AN PETROLEUM UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com