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A SEM image of the surface of the oxidized sample with composition 5 (base+2.5%Mo-1.5%Re-1.5%Ta-1.5%Zr): (a) under magnification ×500; (b) the continuous Al2O3 oxide film with non-uniform distribution of Co2CrO4 spinel inclusions; (c) the transitional MeN-Me layer containing AlN inclusions; and the element distribution maps: (d) O; (e) Al; (f) N; (g) Cr, (h); Mo; (i) Re.
