SEM INVESTIGATION ON HIGH TEMPERATURE OXIDATION OF Fe-23Cr-6Al ALLOYS (WITHOR WITHOUT La, Ce AND Y ADDITIONS)
Mao Xiaoyu
Cite this article:
Mao Xiaoyu. SEM INVESTIGATION ON HIGH TEMPERATURE OXIDATION OF Fe-23Cr-6Al ALLOYS (WITHOR WITHOUT La, Ce AND Y ADDITIONS). Acta Metall Sin, 1980, 16(4): 406-498.
Abstract High temperature oxidation of Fe-23Cr-6Al alloys with and without La, Ceand Y additions at 1300℃ in air has been studied using SEM with a wavelengthdispersive X-ray spectrometer. It is shown that the presence of the cavities formedby the condensation of vacancies caused by the outward diffusion cations resultsin a local detachment at the oxide/substrate interface. This may mainly be respon-sible for the poor oxide adhesion of the alloy without RE. The addition of REchanges the mechanism of growth of the oxide, thus accounts for the improve-ments in oxide adhesion.
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