华中科技大学学报（自然科学版）2011，Vol.39Issue(3)：10-13,4.
Al对Fe3Si基有序合金800℃氧化行为的影响
Effects of Al on the oxidation behavior of Fe3Si based ordered alloys at 800 ℃
摘要
Abstract
Oxidation behavior of Al-alloyed Fe3Si based ordered alloys was studied in air at 800 ℃.The oxidation behavior of Al alloying Fe3Si based ordered alloys were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and electro-probe microanalyzer (EPMA). The resuits show that the addition of Al element can increase the oxidation resistance of Fe3 Si intermetallics at high temperature, the oxidizing dynamic curves are changed from parabola-line compound type to second-degree parabolic type, and oxidation weight gain decrease nearly an order of magnitude. The oxidation kinetics mechanism is mainly Al diffusion outward through sub-boundaries to form protective oxide films Al2 O3 which restrain the diffusion of Fe and Si outward. While the protection effect of Al2O3 is also affected by the phase structure of Al2O3, diffusing channel, etc.关键词
金属间化合物/氧化/速度常数/Fe3Si/Al合金化Key words
intermetallics/ oxidation/ rate constants/ Fe3 Si/ Al alloying分类
通用工业技术引用本文复制引用
周琦,章新民,贾建刚,赵红顺..Al对Fe3Si基有序合金800℃氧化行为的影响[J].华中科技大学学报（自然科学版）,2011,39(3):10-13,4.基金项目
国家自然科学基金资助项目(51001057) （51001057）
甘肃省自然科学基金资助项目(1014RJZA006). （1014RJZA006）
