Oxidation of Some Advanced Single-Crystal Nickel-Base Superalloys in Air at 2000 F (1093 C)

Abstract

The isothermal and thermocyclic oxidation behavior of various advanced single-crystal and directionally solidified superalloys in flowing air at a temperature of 2000 F (1093 C) has been studied. The experimental methods included thermogravimetric measurements of oxidation rates and examination of the reacted specimens by x-ray diffraction (XRD), optical metallography, and scanning electron microscopy (SEM). The oxidation mechanisms of the alloys are discussed.