High -Temperature short term / in situ oxidation behaviour of Haynes-230 at 1200 °C

Author:

S Kathiravan1,Kaliaraj Gobi Saravanan1,Kirubaharan A. M. Kamalan1,Kumar Ravi Ranjan2,Kamatchi Hariharan

Affiliation:

1. Sathyabama Institute of Science and Technology

2. Indian Space Research Organization

Abstract

Abstract The reliability and oxidation kinetics behaviour of the Haynes-230 alloy used in hot combustion components for very long-term applications are of great interest to researchers. To recreate the real-time environment, the in situ surface oxidation behaviour of Haynes-230 alloy at high temperature exposures (800, 1000, and 1200°C) is studied in a customized furnace setup equipped with electrochemical impedance spectroscopy (EIS). The heat-treated samples' phase analysis, surface morphology, and chemical composition were evaluated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The various forms of surface oxide layer formation were investigated using Raman spectroscopy. The EIS method was also utilized to evaluate the oxidation behaviour of Haynes-230 at various temperatures and time durations. Furthermore, the oxidation kinetics were investigated under thermal loading and unloading conditions, and capacitive behaviour was observed under unloading conditions.

Publisher

Research Square Platform LLC

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