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

Tetragonal-phase high-entropy thermal barrier coating material and preparation method thereof

A technology of thermal barrier coating and tetragonal phase, which is applied in the field of tetragonal phase high-entropy thermal barrier coating material and its preparation, and can solve the problems of poor phase stability at high temperature

Active Publication Date: 2021-12-21
EAST CHINA UNIV OF SCI & TECH +2
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor high-temperature phase stability of known thermal barrier coating materials in the prior art, the present invention provides a tetragonal phase high-entropy thermal barrier coating material and its preparation method

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
  • Tetragonal-phase high-entropy thermal barrier coating material and preparation method thereof
  • Tetragonal-phase high-entropy thermal barrier coating material and preparation method thereof
  • Tetragonal-phase high-entropy thermal barrier coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Multicomponent Zr designed according to high entropy 1-4x Y x m x Ta x Nb x o 2 Weigh a certain amount of each oxide powder (wherein x is taken as 0.2, and the component is Zr 0.2 Y 0.2 Yb 0.2 Ta 0.2 Nb 0.2 o 2 ), including ZrO 2 , Y 2 o 3 , Yb 2 o 3 、 Ta 2 o 5 , Nb 2 o 5 The oxide powders were placed in different alumina crucibles, put into a box-type muffle furnace and kept at 1000 °C for 2 h, and the heating rate and cooling rate were controlled at 5 °C / min to remove the adsorbed water and Impurities.

[0028] Pour the calcined oxide powders into a high-energy ball mill jar, add a certain amount of isopropanol (100ml) and zirconia balls (0.3mm, the ball-to-material ratio is 10:1), and perform high-energy ball milling. The rotating speed is 2500 / min, and the ball milling time is 12h.

[0029] The suspension after high-energy ball milling is separated from the ball material, washed 6 times with absolute ethanol, and the obtained mixed suspension is...

Embodiment 2

[0037] Multicomponent Zr designed according to high entropy 1-4x Y x m x Ta x Nb x o 2 Weigh a certain amount of each oxide powder (where x is 0.179, and the component is Zr 0.284 Y 0.179 Yb 0.179 Ta 0.179 Nb 0.179 o 2 ), including ZrO 2 , Y 2 o 3 , Yb 2 o 3 、 Ta 2 o 5 , Nb 2 o 5 The oxide powders were placed in different alumina crucibles, put into a box-type muffle furnace and kept at 1000 °C for 1 h, and the heating rate and cooling rate were controlled at 10 °C / min to remove the adsorbed water and Impurities.

[0038] Pour the calcined oxide powders into a high-energy ball mill tank, add a certain amount of isopropanol (120ml) and zirconia balls (0.4mm, the ball-to-material ratio is 10:1), and perform high-energy ball milling. The rotating speed is 2100r / min, and the ball milling time is 12h.

[0039] The suspension after high-energy ball milling is separated from the ball material, washed 6 times with isopropanol, and the obtained mixed suspension is ...

Embodiment 3

[0050] Multicomponent Zr designed according to high entropy 1-4x Y x m x Ta x Nb x o 2 Weigh a certain amount of each oxide powder (where x is 0.119, and the component is Zr 0.524 Y 0.119 Yb 0.119 Ta 0.119 Nb 0.119 o 2 ), including ZrO 2 , Y 2 o 3 , Yb 2 o 3 、 Ta 2 o 5 , Nb 2 o 5The oxide powders were placed in different alumina crucibles, put into a box-type muffle furnace and kept at 1000 °C for 3 h, and the heating rate and cooling rate were controlled at 8 °C / min to remove the adsorbed water and Impurities.

[0051] Pour the calcined oxide powders into a high-energy ball mill tank, add a certain amount of isopropanol (90ml) and zirconia balls (0.3mm, the ball-to-material ratio is 8:1), and perform high-energy ball milling. The rotating speed is 2700r / min, and the ball milling time is 8h.

[0052] The suspension after the high-energy ball milling is separated from the ball material, washed with isopropanol for 5 times, and the obtained mixed suspension ...

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Fracture toughnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a tetragonal phase high-entropy thermal barrier coating material. The material is formed by ZrO2, Y2O3, M2O3, Ta2O5 and Nb2O5 oxide powder, the component of the material is Zr1-4xYxMxTaxNbxO2, x is more than 0 and less than 0.25, and M is a trivalent rare earth element. The invention also relates to a preparation method of the tetragonal-phase high-entropy thermal barrier coating material. The preparation method comprises the following steps: calcining to remove adsorbed water and impurities in each oxide powder; performing high-energy ball milling; separating, washing and drying balls to obtain mixed powder; and pressing into a ceramic blank by using a ceramic tablet press, and heating to obtain the high-entropy ceramic block material. According to the tetragonal-phase high-entropy thermal barrier coating material, excellent thermodynamic properties are provided through multi-component high entropy, including reduction of heat conductivity, increase of thermal expansion coefficient, enhancement of fracture toughness, good high-temperature stability, excellent CMAS corrosion resistance and the like, and the tetragonal-phase high-entropy thermal barrier coating material has the potential of serving at a higher gas temperature.

Description

technical field [0001] The present invention relates to a thermal barrier coating, more particularly to a tetragonal high-entropy thermal barrier coating material and a preparation method thereof. Background technique [0002] Thermal Barrier Coatings are used to protect the alloy blades of high-pressure turbine components in ground gas turbines and aero-engines from corrosion and oxidation by high-temperature gas, and increase the turbine inlet temperature, thereby greatly improving the working efficiency of gas turbines and aero-engines . [0003] Currently the most widely used thermal barrier coating material is 7-8wt% yttria-stabilized zirconia (7-8YSZ). In order to pursue higher working efficiency of gas turbines, the gas service temperature of the next generation of gas turbines will definitely exceed 1500°C, which is higher than the current application range of 7-8YSZ thermal barrier coatings. The known thermal barrier coating materials have disadvantages such as po...

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): C04B35/66C04B35/495C04B35/488C04B35/622
CPCC04B35/66C04B35/495C04B35/488C04B35/62222C04B2235/3225C04B2235/3246C04B2235/3224C04B2235/3251C04B2235/9607C04B2235/9669C04B2235/96Y02T50/60
Inventor 张显程赵晓峰郭芳威石俊秒杨凯王卫泽刘利强范晓慧姚尧
Owner EAST CHINA UNIV OF SCI & TECH
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