Critical tuning of magnetron sputtering process parameters for optimized solar selective absorption of NiCrOx cermet coatings on aluminium substrate

► Sputtered NiCr/NiCrOx films as spectrally selective absorptive coatings. ► Optimization of the sputtering parameters enables nano-structured coating deposition. ► NiCrOx Cermet composed of Ni nanoparticles and Cr2O3/NiO matrix.