Structure and property changes of air-sprayed NiCrAlY overlay coatings after laser remelting

Krystyna Kobylanska-Szkaradek

doi:10.1117/12.405967

2 November 2000 Structure and property changes of air-sprayed NiCrAlY overlay coatings after laser remelting

Krystyna Kobylanska-Szkaradek

Proceedings Volume 4238, Laser Technology VI: Applications; (2000) https://doi.org/10.1117/12.405967
Event: Laser Technology VI, 1999, Szczecin, Poland

Abstract

The analysis concerned the influence of laser melting with powder density 0.126x10⁹ W/m² scanning rate 5 m/min on the transfer from liquid to solid state and structure stability in solid state, thermal conductivity, resistance to thermal cyckling of NiCrAlY plasma sprayed coatings on nickel base heat-resistant alloy. It was stated that laser remelting causes structure changes and porosity disappearance, which is the reason for the increase of thermal conductivity of remelted coatings and at the same time decrease of interaction efficiency as thermal barriers and increase of exploatation stability.

Citation Download Citation

Krystyna Kobylanska-Szkaradek "Structure and property changes of air-sprayed NiCrAlY overlay coatings after laser remelting", Proc. SPIE 4238, Laser Technology VI: Applications, (2 November 2000); https://doi.org/10.1117/12.405967

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