Performance of advanced turbocharger alloys and coatings at 850-950 °C in air with water vapor

► TiAl and Ni-base alloys for turbochargers were tested in 1 h cycles at 850 °C and 950 °C in wet air. ► TiAl did not lose room temperature ductility but exhibited a large mass loss at 950 °C after 500 h. ► Ni-base alloys are better candidates for ≥ 950 °C turbochargers. ► Microstructure and 950 °C oxidation behavior of slurry and CVD aluminide coatings on 3 Ni-base alloys