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

Method for improving high temperature resistant sulfidation corrosion property of rare earth modified MCrAlY coating

A technology of rare earth modification and corrosion performance, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., and can solve problems such as corrosion

Inactive Publication Date: 2010-01-06
HARBIN INST OF TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is to solve traditional MCrAlY coating under high temperature, sulfur partial pressure > 0.1Pa, oxygen partial pressure -5 When used in the environment of Pa, it will suffer from serious corrosion problems. A method for improving the high temperature sulfidation corrosion resistance of rare earth modified MCrAlY coatings is provided.

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
  • Method for improving high temperature resistant sulfidation corrosion property of rare earth modified MCrAlY coating
  • Method for improving high temperature resistant sulfidation corrosion property of rare earth modified MCrAlY coating
  • Method for improving high temperature resistant sulfidation corrosion property of rare earth modified MCrAlY coating

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Specific embodiment one: the method step of rare earth modified MCrAlY coating improving its anti-high temperature sulfidation corrosion performance in the present embodiment is as follows: first rare earth metal (referred to as RE) and MCrAlY are prepared into thermal spraying feeding material, then feeding material is heated The RE-MCrAlY coating is obtained by spraying on the base material, wherein M is Ni, Co or NiCo, the rare earth metal accounts for 0.1-5% of the feeding material, and the thickness of the coating is 300-400 μm.

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the rare earth metal is a rare earth metal with a nanostructure or a rare earth metal with nanoscale particles. Others are the same as in the first embodiment.

[0013] The coating obtained by the method of this embodiment contains nanostructures or nanoscale particles.

specific Embodiment approach 3

[0014] Embodiment 3: This embodiment is different from Embodiment 1 in that the rare earth compound or rare earth mixture and MCrAlY are prepared as thermal spraying feedstock. Others are the same as in the first embodiment.

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

A method for improving sulfurized corrosion resistance under high temperature by rare-earth modified MCrAlY, relates to a material modified method. The invention solves the problem that the traditional MCrAlY generally may be corroded severely when it is used under high temperature in the sulfur partial pressure of more than 0.1 Pa and oxygen partial pressure of less than 10-5 Pa. The inventive method includes the steps of: at first thermal spraying feed is produced by rare-earth metal (RE), rare-earth oxide and MCrAlY, then RE-MCrAlY coating is produced by thermal spraying the feed on the based bady material, wherein M is Ni, Co or NiCo, rare-earth is 0.1-5% of weight of the feeding, the thickness of the coating is 300-400 Mum. The inventive method is easy, and can be widely usable for commercial process. The sulfurized corrosion resistance under high temperature of MCrAlY coating can be improved to twice by adding rare-earth.

Description

technical field [0001] The invention relates to a method for modifying materials, in particular to a method for improving the high-temperature sulfidation corrosion resistance of MCrAlY coatings. Background technique [0002] As a representative of the fourth-generation protective coating, thermal barrier coating (TBC) is currently one of the surface protective coatings with the best high-temperature protection performance and the best application prospects. The traditional TBC is generally a composite coating composed of a ceramic surface layer and a metal transition bottom layer. Among them, the ceramic surface layer is generally made of ceramic oxides such as Al 2 o 3 , ZrO 2 etc. and stabilizer composition. The metal transition bottom layer is usually MCrAlY, because MCrAlY has better high temperature corrosion resistance and bonding strength (where M is Fe, Co, Ni or NiCo, the choice depends on the working environment). TBC mainly works in high-temperature atmosphe...

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 Patents(China)
IPC IPC(8): C23C4/06C23C4/073
Inventor 王铀
Owner HARBIN INST OF 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