Oxidation Behavior of a New Ni-Base Superalloy in Air at 850°C and 950°C

Jun Bao Yang; Ke Qiang Qiu; Xu Dong Lu; Zhuang Qi Hu

doi:10.4028/www.scientific.net/AMR.299-300.466

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 299-300Oxidation Behavior of a New Ni-Base Superalloy in...

Oxidation Behavior of a New Ni-Base Superalloy in Air at 850°C and 950°C

Abstract:

The oxidation behavior of the Ni-base superalloy was studied at 850 °C and 950 °C for 100 h in air using XRD and SEM/EDAX. The mass gain of the alloy at 850 °C was found to be lower than that of the alloy at 950 °C. The oxidation rate was determined by temperatures. The alloy obeyed a subparabolic rate law during oxidation at 850 °C and 950 °C. The scale consisted of an outer porous layer of TiO_2,a middle continuous layer of Cr₂O₃, and inner Al₂O₃.