Improved oxidation resistance of NiCrAlY coatings

In order to improve the oxidation resistance of NiCrAlY coatings, Al2O3 second phase was incorporated into NiCrAlY coatings obtained by plasma-laser technique. After laser remelting, the Al2O3 second phase was distributed in the grains as well as on the grain boundaries of the coatings. The Al2O3 second phase could improve the oxidation resistance of NiCrAlY coatings during oxidation at 1000 degreesC. (C) 2002 Elsevier Science B.V. All rights reserved.