Ta effect on oxidation of a nickel-based single-crystal superalloy and its sputtered nanocrystalline coating at 900-1100 °C

- Sputtering nanocrystalline coating was prepared on single-crystal superalloy.
- Oxidation and spallation resistance was enhanced by nanocrystalline coating.
- Effect of refractory element Ta on oxidation was discussed.
- No notable element interdiffusion occurred after oxidation.