Measurement of the Stress in Oxide Scales Developed Upon Oxidation of a Pt‐Based Alloy in Air at 1250°C

Abstract

The nature and magnitude of stress in the scales formed on Pt‐11Al‐3Cr‐2Ru (at.%) alloy oxidized in air at 1250°C, for up to 500 h, were determined. This is to establish their long‐term viability during high‐temperature applications. Residual stress in the scales was measured using luminescence piezospectroscopy and found to be compressive. It decreased gradually with increased oxidation time, before reaching a constant value. The compressive stress was also found to be lower than those of other Ni‐ and Fe‐based superalloys. Thus, the current alloy has a promising potential for high‐temperature applications.