Thermal barrier coating with thermal radiation property as well and preparation method of thermal barrier coating

A thermal barrier coating, thermal radiation technology, applied in the direction of coating, metal material coating process, climate sustainability, etc. It can meet the protection requirements and attenuation of titanium alloy materials on the outer surface of the cavity of the super aircraft, and achieve the effects of good bonding, increasing density and reducing roughness.

Inactive Publication Date: 2015-03-25
BEIJING GENERAL RES INST OF MINING & METALLURGY
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the traditional thermal barrier coating has low thermal conductivity, due to the low blackness of the zirconia layer on the coating surface, it is in a thermally translucent state (the so-called translucent state means that part of the heat is absorbed by the ceramic coating and conducted inward, and the other Part of it convects with the external environment and radiates to the atmosphere), the external thermal radiation is very small (the thermal radiation rate is only 0.3-0.6), and most of the heat will be conducted to

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 thermal radiation property as well and preparation method of thermal barrier coating
  • Thermal barrier coating with thermal radiation property as well and preparation method of thermal barrier coating
  • Thermal barrier coating with thermal radiation property as well and preparation method of thermal barrier coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] A thermal barrier coating with thermal radiation performance, the coating is divided into three layers, from the outside to the inside are the sealing heat dissipation layer, the ceramic layer and the bonding layer. Chemical composition: the sealing heat dissipation layer is SiO 2 ; The ceramic layer is 6-8% Y 2 o 3 , 92-94% ZrO 2 ; The bonding layer is NiCrAlY alloy, its composition is 70-72% Ni, 21.3-24.5% Cr, 5-6% Al, 0.5-0.7% Y. Coating thickness: sealing heat dissipation layer 4-6μm; ceramic layer 200-300μm; bonding layer 80-150μm.

[0030] A method for preparing a thermal barrier coating with thermal radiation performance, comprising the following steps:

[0031] (1) Perform conventional pretreatment on workpieces before thermal spraying, such as degreasing, derusting, and sandblasting.

[0032](2) Spray the NiCrAlY adhesive layer on the surface of the pretreated workpiece with supersonic flame (HVOF). The chemical composition of the NiCrAlY adhesive layer is...

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

No PUM Login to view more

Abstract

The invention discloses a thermal barrier coating with thermal radiation property. The thermal barrier coating is a SiO2 plugging surface layer which is prepared by on the surface of a ZrO2 coating after sol-gel by using a dipping-pull method and is high in finishing degree and low in roughness. On one hand, a function of increasing the thermal radiation rate of the surface of the coating is achieved, on the other hand, a function of filling pores of the thermal resisting coating is achieved, and the pores in the surface of the coating are made up. The composite coating of a novel structure can be used for improving the thermal protection property of the surface of a titanium alloy at high temperature, and has important values on protection of high-speed aircraft shells.

Description

technical field [0001] The invention belongs to the technical field of thermal spraying, and relates to a thermal barrier coating with thermal radiation performance and a preparation method thereof. Background technique [0002] When a high-speed aircraft flies at high speed for a long time, the outer surface of the cavity and the atmosphere undergo intense friction to generate heat, which brings about a serious aerodynamic heating effect. The surface temperature of hyper-vehicle cavity can reach over 800°C for a short time. On the one hand, the mechanical properties of the metal-based structural materials that constitute the main load-bearing components of the cavity will decline rapidly. On the other hand, this type of aircraft has strict requirements on the structural weight and effective loading volume, and the thickness and weight of the thermal protection layer must be reduced as much as possible. A large-area, thin-thick thermal protective coating is prepared on the ...

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
IPC IPC(8): C23C4/12C23C4/18C23C4/06C23C4/10C23C4/073C23C4/11C23C4/129C23C4/134
CPCC23C4/18Y02T50/60
Inventor 章德铭张鑫袁建鹏高峰徐红艳刘安强赵晓东
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap