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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Fe-Al phase formation around SHS reactions under isothermal conditions
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Fe-Al phase formation around SHS reactions under isothermal conditions

机译：等温条件下SHS反应周围的Fe-Al相形成

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摘要

This study investigates the phenomena preceding and accompanying the SHS reaction between Fe and Al elemental powders during sintering. SEM and XRD analysis were used to observe the mechanisms of formation of Fe-Al intermetallic phases. The analysis of sintered material just before the SHS reaction demonstrates that in addition to the well-known Fe_2Al_5 phase and the low-aluminum solid solution of iron, the high-aluminum phases FeAl_2 and FeAl_3 are formed. The kinetics of phase transformations under isothermal conditions were investigated by DSC using the JMA (Johnson-Mehl-Avrami) model. This approach allowed us to calculate Avrami coefficients, which characterize the speed and the manner of particular phase transformations.
机译：这项研究调查了烧结过程中铁和铝元素粉末之间发生SHS反应之前和伴随的现象。用SEM和XRD分析观察了Fe-Al金属间相的形成机理。 SHS反应之前的烧结材料分析表明，除了众所周知的Fe_2Al_5相和铁的低铝固溶体之外，还形成了高铝相FeAl_2和FeAl_3。 DSC使用JMA（Johnson-Mehl-Avrami）模型研究了等温条件下的相变动力学。这种方法使我们能够计算Avrami系数，该系数表征了特定相变的速度和方式。

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