建立了Fe- 6.8%Al-1.0%Si/Fe和Fe-6.3%Al-0.9%Si/Fe两组扩散偶,分别对其进行1 050 ℃×3 h和1 000 ℃×64 h的退火处理,而后采用EPMA技术对合金元素在不同扩散偶中的成分分布进行测定;同时结合Fe-Al-Si体系的热力学与动力学性质,采用Thermo-Calc & DICTRA软件中的移动界面模型,对Fe、Al和Si元素随温度与时间的浓度变化情况进行了模拟计算,计算结果与实验测定的成分分布数据吻合得较好,从而验证了计算中所采用热力学与动力学参数的有效性,并可为模拟相关合金体系中相组成的演变行为提供计算依据.
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