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采用静态氧化增重实验及扫描电镜、能谱分析和X射线衍射分析等手段,研究了ODS-310合金在高温环境下的氧化行为,分析了氧化层的形貌、成分和物相,并对其高温氧化动力学曲线进行拟合.实验发现各个温度下的氧化动力学曲线均基本符合抛物线规律.在700℃和900℃氧化100 h以后,ODS-310合金均表现出优异的抗氧化性能.但是,当氧化温度为1100℃时,氧化层厚度明显增厚,而且氧化层有疏松和不连续的现象,不利于氧化层对基体的保护.氧化程度随着氧化温度的提高和氧化时间的延长而加剧.通过能谱和X射线衍射综合分析可知氧化层的物相为Cr_2O_3.
Oxidation behavior of ODS-310 alloy under high temperature was studied by means of static oxidation experiment, SEM, EDS and X-ray diffraction analysis. The morphology, composition and phase of oxide layer were analyzed. The kinetic curves of oxidation at high temperature were fitted.It was found that the oxidation kinetics curves at all temperatures basically accord with the parabolic law.ODS-310 alloy exhibited excellent oxidation resistance after being oxidized at 700 ℃ and 900 ℃ for 100 h. However, when the oxidation temperature is 1100 ℃, the thickness of the oxide layer is significantly thicker, and the oxide layer is loose and discontinuous, which is not conducive to the protection of the oxide layer on the substrate. The oxidation degree increases with the oxidation temperature and oxidation time And exacerbated by energy spectrum and X-ray diffraction analysis shows that the oxide phase is Cr_2O_3.