Microstructure and oxidation behavior of NiCoCrAl/YSZ microlaminates produced by EB-PVD

► Effect of laminate structure on oxidation behavior of microlaminates was studied. ► Oxygen diffusion through YSZ layers led to the oxidation of internal metal-layers. ► The thinner NiCoCrAl layer was more difficult to form the stable Al2O3 scale. ► Control of oxide scale growth by the oxygen diffusion in the outer metal-layers. ► Control of oxide scale growth by the metal ionic diffusion in internal metal-layers.