Abstract
This work evaluates the influence of yttrium on the heat and wear resistance of active arc sprayed (AAS) coatings produced using FeCrBAl cored wire. The AAS process differs from ordinary arc spraying in that it uses propane-air combustion products as a carrier gas instead of compressed air. This increases particle velocity and temperature and forms a reducing atmosphere that protects metal particles in flight and improves coating adhesion and porosity. Coating samples produced with different amounts of yttrium were characterized in terms of surface morphology, microstructure, phase composition, and hardness. They were also subjected to heat resistance, abrasive wear, and corrosion tests in which they performed better than typical wrought steels used in boilers.
