Electron Microscopy Characterization of the High Temperature Degradation of the Aluminide Layer on Turbine Blades Made of a Nickel Superalloy
Authors:
- Mariusz Bogdan,
- Witold Zieliński,
- Tomasz Płociński,
- Krzysztof Kurzydłowski
Abstract
The effects of exposure to overheating (temperature above 1000 °C) on the degradation (modification) of layers of coatings (coatings based on aluminum) of uncooled polycrystalline rotor blades of aircraft turbine jet engines were investigated under laboratory conditions. In order to determine the nature of the changes as well as the structural changes in the various zones, a multi-factor analysis of the layers of the coating, including the observation of the surface of the blades, using, among others, electron microscopy, structural tests, surface morphology, and chemical composition testing, was carried out. As a result of the possibility of strengthening the physical foundations of the non-destructive testing of blades, the undertaken research mainly focused on the characteristics of the changes occurring in the outermost layers of the coatings. The obtained results indicate the structural degradation of the coatings, particularly the unfavorable changes, become visible after heating to 1050 °C. The main, strongly interacting, negative phenomena include pore formation, external diffusion of Fe and Cr to the surface, and the formation and subsequent thickening of Fe-Cr particles on the surface of the alumina layer.
- Record ID
- WUT78d0dca83e594155b9789ef757f2ba15
- Author
- Journal series
- Materials, ISSN 1996-1944
- Issue year
- 2020
- Vol
- 13
- No
- 14
- Pages
- 32-40
- Publication size in sheets
- 162.00
- Keywords in English
- turbine blade; nickel-based superalloys; aluminide layer; high temperature; electron microscopy
- ASJC Classification
- DOI
- DOI:10.3390/ma13143240 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/13/14/3240 Opening in a new tab
- Language
- (en) English
- License
- File
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 12-05-2022, ArticleFromJournal
- Publication indicators
- = 1; = 1; = 2; : 2017 = 1.285; : 2018 (2 years) = 2.972 - 2018 (5 years) =3.532
- Citation count
- 2
- Uniform Resource Identifier
- https://repo.pw.edu.pl/info/article/WUT78d0dca83e594155b9789ef757f2ba15/
- URN
urn:pw-repo:WUT78d0dca83e594155b9789ef757f2ba15
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.