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

Coating improving oxidation resistance of TiAl alloy and preparing method of coating

A coating and alloy technology is applied in the field of coatings and their preparation for improving the oxidation resistance of TiAl alloys, which can solve the problems affecting long-term oxidation performance and mechanical properties, poor compatibility of TiAl alloy substrates, and affecting the long-term oxidation resistance of coating systems. performance and other issues, to achieve the effect of improving the YSZ ceramic surface layer structure, improving the resistance to cold and heat cycles, and good interface bonding

Active Publication Date: 2016-04-06
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned coatings have significantly improved the oxidation resistance of TiAl alloys, but they have the following disadvantages: 1) Aluminized coatings are prone to penetrating cracks when preparing coatings, and can be oxidized along cracks during oxidation, and transverse cracks occur, affecting its Long-term oxidation performance and mechanical properties; 2) Serious interdiffusion between the coating and TiAl alloy occurs during the oxidation process of MCrAlY coating, forming a hard and brittle interdiffusion zone, which affects the long-term oxidation resistance of the coating system; 3) TiAlCr coating The target material is brittle, difficult to melt, and the coating deposition efficiency is low; figure 1 It can be observed that after oxidation for 100 hrs, there is obvious interdiffusion between the TiAl substrate and the NiCrAlY coating, forming a hard and brittle interdiffusion zone, forming cracks, and significantly damaging the mechanical properties of the substrate; 4) the nitride coating High stress and poor compatibility with TiAl alloy matrix

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
  • Coating improving oxidation resistance of TiAl alloy and preparing method of coating
  • Coating improving oxidation resistance of TiAl alloy and preparing method of coating
  • Coating improving oxidation resistance of TiAl alloy and preparing method of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Prepare an AlSiY coating of about 20 μm on the surface of the TiAl alloy sample substrate by vacuum arc plating, and then perform vacuum diffusion heat treatment at 1010-1080 °C for 2-4 hours to obtain a diffused AlSiY bottom layer with a thickness of 40-60 μm.

[0027] The AlSiY bottom layer is subjected to wet blasting treatment, ultrasonic cleaning, acetone solution immersion, and drying; the wet blasting process parameters are: white corundum sand particle size 180-280 mesh, corundum sand content 20%-35%, wind pressure 0.15MPa~0.25MPa, sand blowing distance is 180mm~350mm.

[0028] The above samples were installed on special fixtures and fastened with superalloy wires.

[0029] Install the sample into the loading chamber, turn on the mechanical pump and Roots pump, and vacuumize until the vacuum degrees of the main vacuum chamber and the loading chamber are lower than 5×10 -2 When Pa, 1Pa, open the gate valve between the two chambers, pass in Ar gas, and perform io...

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 relates to a coating and a preparing method thereof, in particular to a coating improving oxidation resistance of TiAl alloy and a preparing method of the coating. The coating improving oxidation resistance of TiAl alloy comprises an AlSiY bottom layer and a YSZ ceramic face layer, the AlSiY bottom layer is prepared through vacuum arc plating, and high-temperature diffusion and wet grit blasting treatment is carried out. The YSZ ceramic face layer of a columnar crystal structure is prepared through an electron beam physical vapor deposition method, and a typical columnar crystal structure is presented. The interfacial compatibility of the coating improving oxidation resistance of TiAl alloy and TiAl alloy is good, the oxidation resistance is superior, and the strain tolerance is high.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a coating for improving the oxidation resistance of a TiAl alloy and a preparation method thereof. Background technique [0002] TiAl alloy has the advantages of low density, high elastic modulus and good high-temperature strength, and has a good application prospect in the aero-engine industry. However, its insufficient high-temperature oxidation resistance cannot meet the requirements of practical applications, so the development of high-temperature protective coatings suitable for TiAl alloys is one of the important prerequisites for its application. [0003] At present, people have developed aluminized coating, MCrAlY cladding coating, TiAlCr coating and nitride coating for γ-TiAl alloy. The above-mentioned coatings have significantly improved the oxidation resistance of TiAl alloys, but they have the following disadvantages: 1) Aluminized coatings are prone to p...

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): C23C14/32C23C14/30C23C14/06C23C14/16
CPCC23C14/083C23C14/16C23C14/30C23C14/325Y02T50/60
Inventor 程玉贤王博张艺馨张春刚刘礼祥
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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