| 摘 要： | <正>To explore and study the Fe-Al system alloy presenting exceptional oxidation resistance at high temperature,the Fe-36Al-0.09C-0.09B-0.04Zr alloy was designed and developed.The microstructure and hardness of the backing at 1250℃were analyzed and measured.Thermodynamics and kinetics of the oxidation behavior were also analyzed by X-ray diffraction,scanning electron microscopy, and energy-dispersive X-ray spectroscopy techniques.The results show that the microstructure of the Fe-36Al-0.09C-0.09B-0.04Zr alloy is FeAl phase at ambient temperature and is stable at 1250℃.It displays the excellent property of oxidation resistance because the oxide film has only the Al_2O_3 layer,and its oxidation kinetics curve obeys the parabolic law at 1250℃.The oxidation mechanism at 1250℃is presumed that in the early oxidation period,the alloy oxidizes to form a large number of Al_2O_3 and a little Fe_2O_3,then,the enrichment of Al caused by Fe oxidization combines with O to form Al_2O_3.
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