Abstract
The effects of yttrium addition on oxidation behavior of a Fe-20Cr-4Al-S alloy were studied in dry air at 1273K for 3600ks by mass change measurements, macro-morphology of oxidized surface, X-ray diffraction and scanning electron microscopy. Mass change of an alloy containing only S (185ppm) was 0.67×10-2kg/m2. The mass change of the alloys increased in the order of the 300ppmY<800ppmY<3700ppmY<10ppmY<185ppmS.
