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Y2O3-dispersed NiAl was produced by a powder-metallurgy process. By adding Y as an oxide dispersion (OD), problems with NiYx formation and internal oxidation were avoided. Short-term isothermal and cyclic-oxidation performance at 1200°–1500° C was compared to cast NiAl alloys with and without Zr. Results indicate that the Y2O3 addition was beneficial to scale adhesion and significantly modified the...
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