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

Gradient nano-coating used for thermal barrier coating anti-corrosion function and preparation method thereof

A technology of nano-coating and thermal barrier coating, which is applied in the field of gradient nano-coating and its preparation, can solve problems such as thermal expansion coefficient mismatch, peeling off of the outer anti-corrosion alumina coating, etc., to overcome the difference in thermal expansion coefficient, method Simple and easy to implement, the effect of uniform coating structure

Inactive Publication Date: 2013-04-24
SHANGHAI UNIV
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the objects of the present invention is to provide a gradient YSZ / Al for thermal barrier coating anti-corrosion function 2 o 3 Nano-coating to solve the problem that the thermal expansion coefficient of the YSZ material and the alumina material do not match in the structure of the anti-corrosion alumina coating covering the surface of the YSZ thermal barrier coating, which easily leads to the peeling off of the outer anti-corrosion alumina coating

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
  • Gradient nano-coating used for thermal barrier coating anti-corrosion function and preparation method thereof
  • Gradient nano-coating used for thermal barrier coating anti-corrosion function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] YSZ / Al 2 o 3 The preparation method of the gradient nano-coating is realized through the following steps:

[0020] The first step: the monoclinic YSZ sol with a solid content of 2wt% and the Al with a solid content of 2wt% 2 o 3 Sol, respectively prepare YSZ-Al according to volume ratio of 3:1, 1:1 and 1:3 2 o 3 Mixed sol.

[0021] The second step: use a dipping machine to dip-coat the zirconia ceramic substrate sequentially with YSZ sol, YSZ-Al with a volume ratio of 3:1, 1:1 and 1:3 2 o 3 Mixed sols, and Al 2 o 3 Sol. The descending and ascending speeds are 20mm / min, the dipping time is 120s, and it is dried at 100°C. Each sol was dip-coated 5 times and calcined at 600°C for 2 hours. Prepared a gradient nano-coating structure with a total thickness of 1.23 μm and a particle size of 10-100 nm (see the SEM images of its surface and cross-section figure 1 ). according to figure 1 (2), the cross-sectional view of the coating shows that there is no obvious bo...

Embodiment 2

[0023] YSZ / Al 2 o 3 The preparation method of the gradient nano-coating is realized through the following steps:

[0024] The first step: the monoclinic YSZ sol with a solid content of 2wt% and the Al with a solid content of 2wt% 2 o 3 Sol, prepare YSZ-Al according to volume ratio of 9:1, 3:1, 3:2, 1:1, 2:3, 1:3 and 1:9 respectively 2 o 3 Mixed sol.

[0025] The second step: Use a dipping machine to dip the zirconia ceramic substrate into YSZ sol sequentially, the volume ratio is 9:1, 3:1, 3:2, 1:1, 2:3, 1:3 and 1:9 YSZ-Al 2 o 3 Mixed sols, and Al 2 o 3 Sol. The descending and ascending speeds are 20mm / min, the dipping time is 120s, and it is dried at 100°C. Each sol was dip-coated 5 times and calcined at 800°C for 2 hours. A gradient nano-coating structure with a total thickness of 5.0 μm and a particle size of 10-100 nm is prepared.

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
Login to View More

Abstract

The invention discloses a gradient nano-coating used for a thermal barrier coating anti-corrosion function and a preparation method thereof. A substrate is steeped and lifted in pure sol and mixed sol of yttria stabilization zirconia (YSZ) and Al 2O3. A gradient coating structure with proportion of the YSZ and the Al2O3 changed from inside to outside is obtained in a prepared mode. The gradient nano-coating is composed of particles with the particle diameter of 10 to 100nm. The total thickness of the coating is 0.5 to 5 micrometers. According to the novel gradient coating structure, the facts that anti-corrosion property of the Al2O3 is kept and meanwhile a phenomenon of coating exfoliation due to difference of thermal expansion coefficients between the YSZ and the Al2O3 materials is overcome are hopeful to be achieved, the gradient nano-coating structure is prepared through a mixed sol steeping and lifting method, and then high temperature roasting is conducted. A composition weight ratio of the YSZ to the Al2O3 in the mixed sol changes between 9 to 1 and 1 to 9. The particles contained by the YSZ sol are in a monoclinic crystal shape. Temperature of the high temperature roasting is 500 to 800 DEG C. The preparation method is simple and convenient to achieve, and practical. The coating prepared is even in structure.

Description

technical field [0001] The invention relates to a gradient nano-coating used for the anti-corrosion function of thermal barrier coatings and a preparation method thereof, belonging to the technical field of anti-corrosion protection of thermal barrier coatings. Background technique [0002] Thermal barrier coatings (Thermal barrier coatings, TBCs) are currently one of the most advanced high-temperature protective coatings. By depositing one or more layers of ceramic coatings on the metal surface, a large temperature gap is generated between the high-temperature gas and the working substrate. To protect the metal substrate in the high temperature working environment, to prolong the life of the parts and improve the thermal efficiency of the heat engine. Since the 1970s, Y 2 o 3 Stable ZrO 2 Since (YSZ) thermal barrier coatings were successfully applied to aeroengine combustion chambers and other high-temperature components, YSZ TBCs have been widely used in aero turbines, ...

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): C04B35/48C04B35/10C04B35/622
Inventor 施利毅袁帅刘瑞丽王竹仪赵尹张美红
Owner SHANGHAI UNIV
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