Publication detail

Damage of Diffusion Coatings on Turbine Blades

KIANICOVÁ, M. SLÁMEČKA, K. POKLUDA, J.

Original Title

Damage of Diffusion Coatings on Turbine Blades

Type

conference paper

Language

English

Original Abstract

Nickel- and cobalt-based superalloys have been developed and are used in the hot sections of gas turbines in order to meet complex high-temperature phenomena. The gas temperature in modern engines exceeds 1650 C in the turbine section and its cooled parts reach temperatures as high as 1200 C. During operation, the structural materials degrade by fatigue, creep, oxidation, corrosion and erosive wear. Protective coatings provide barriers between the alloys and outer environment and, in particular, they enhance a resistance to oxidation and hot corrosion. The metallic coatings can be divided into two categories: diffusion and overlay coatings. Diffusion aluminide coatings (DAC) are based on the intermetallic compound beta-NiAl that forms under the influence of the substrate. Although DAC have been enjoying wide application, they have a limitation which arises from no deliberate changes of their properties to meet requirements of specific service conditions. This article is focused on a detection of damage that formed in the diffusion coatings on first stage turbine blades after two different short-term overheating events. Motivation for this study came from demands for an extension of our knowledge of degradation mechanisms. A possibility of a non-destructive assessment of the damage level using suitable damage parameters is also briefly described

Keywords

Diffusion aluminide coating, overheating, degradation parameter, creep, aircraft engine

Authors

KIANICOVÁ, M.; SLÁMEČKA, K.; POKLUDA, J.

RIV year

2011

Released

18. 5. 2011

Publisher

Tanger sro

Location

Ostrava

ISBN

978-80-87294-24-6

Book

METAL 2011 Conference Proceedings

Edition

Metal

Edition number

1

Pages from

840

Pages to

846

Pages count

7

BibTex

@inproceedings{BUT89317,
  author="Marta {Kianicová} and Karel {Slámečka} and Jaroslav {Pokluda}",
  title="Damage of Diffusion Coatings on Turbine Blades",
  booktitle="METAL 2011 Conference Proceedings",
  year="2011",
  series="Metal",
  number="1",
  pages="840--846",
  publisher="Tanger sro",
  address="Ostrava",
  isbn="978-80-87294-24-6"
}