Discussion of “Nucleation mechanism of eutectic phases in aluminum-silicon hypoeutectic alloys”
Discussion of “Nucleation mechanism of eutectic phases in aluminum-silicon hypoeutectic alloys”
复制标题
“铝硅亚共晶合金中共晶相的形核机制”的探讨
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Hillert
中科院分区：
文献类型：
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作者：
A. Dahle;M. Hillert
以前的研究试图证明，在普通的铝硅共晶中，每一片硅都是通过含铁小颗粒的作用单独成核的。该研究证明，需要更全面地了解在没有化学改性剂的情况下的Al-Si共晶反应，以阐明化学改性Al-Si合金中的复杂机制。针对这一说法，本文作者指出，几十年来，人们已经很好地理解了铝硅合金的普通共晶反应机制，因此需要非常有力的证据来证明对这一理解的修正是合理的。就其本身而言，第一项研究的作者通过考虑热分析、光学显微镜、扫描和透射电子显微镜、选区电子衍射（SAED）分析和对精确控制化学样品进行的元素X射线绘图的结果，证明了其修订声明的合理性。
A previous study tried to prove that each plate of Si in the ordinary Al-Si eutectic is nucleated individually by the action of a small iron-containing particle. The study justified the need for a more complete understanding of the Al-Si eutectic reaction in the absence of chemical modifiers in order to shed light on the complicated mechanisms operating in chemically modified Al-Si alloys. Reacting to this claim, the present authors state that the mechanisms of the ordinary eutectic reaction of Al-Si alloys have been well understood for several decades, thus a very strong evidence is required to justify a revision of that understanding. For their part, the authors of the first study justified their claim for a revision by considering results of thermal analyses, optical microscopy, scanning and transmission electron microscopy, and selected area electron diffraction (SAED) analyses and elemental X-ray mapping performed on samples of precisely controlled chemistry.