Detail publikace

Degradation of Protective Al-Si Coatings during Exploatation of Gas Turbine Blades

POKLUDA, J. KIANICOVÁ, M.

Anglický název

Degradation of Protective Al-Si Coatings during Exploatation of Gas Turbine Blades

Typ

Článek recenzovaný mimo WoS a Scopus

Jazyk

en

Originální abstrakt

Diffusion Al-Si coatings are often used to protect rotor blades of aircraft engines against high-temperature corrosion in environments containing sulfur compounds. Besides other microstructural changes, the degradation of AlSi layers can be indicated by an increasing amount of surface oxide phases and changes in parameters of the layer geometry. In practice, the timetemperature area beyond a critical temperature of the outgoing gas is used as an empirical exploitation parameter D indicating a degradation level. The efficiency of such approach was investigated by analyzing degradation features in the surface layers of rotor blades after exploitations corresponding to different values of D. Determined simple relationships between the relative thickness of degraded layer and the parameter D verify the methodology and yield its clear geometrical interpretation. However, this method fails to provide reasonable information in case when the gas is burning outside the combustion chamber due to a sudden decrease of turbine revolutions.

Klíčová slova anglicky

Degradation; Al-Si Coatings; Gas Turbine Blades

Vydáno

2008-02-01

ISSN

0255-5476

Časopis

Materials Science Forum

Ročník

567-568

Číslo

1

Strany od–do

309–312

Počet stran

4

BIBTEX


@article{BUT45208,
  author="Jaroslav {Pokluda} and Marta {Kianicová}",
  title="Degradation of Protective Al-Si Coatings during Exploatation of Gas Turbine Blades",
  journal="Materials Science Forum",
  year="2008",
  volume="567-568",
  number="1",
  pages="309--312",
  issn="0255-5476"
}