Effect of Phosphorus Content on the Microstructure Evolution of Highly Undercooled Al-60%Si Alloys

IF 3.3 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Silicon Pub Date : 2025-01-08 DOI:10.1007/s12633-024-03219-x

Bo Dang, Zengyun Jian, Junfeng Xu

引用次数: 0

Abstract

In order to investigate the effect of P content on the growth morphology and growth mode of the Si phase, the Al-60%Si alloys containing 0.5%P and 1.0%P were subjected to deep undercooling using an electromagnetic levitator. The morphology evolution and growth mode of the Si phase were studied by analyzing the dynamic images recorded by HSV and the SEM images of as-solidified samples. The results reveal that the morphology of the Si phase transformed from the large strip shape to coarse bulks and regularly arranged dendrites, then to spheroidal and rod-shaped with increase of undercooling, and the corresponding growth mode changed from faceted growth to mixed growth, then to non-faceted growth. The P refines the size of the Si phase by enhancing the nucleation rate of the Si phase. With the increase of P content, the critical undercoolings of growth mode transition decrease, and the experimental results are in good agreement with the theoretical predicted results.

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磷含量对高过冷Al-60%Si合金组织演变的影响

为了研究P含量对Si相生长形态和生长方式的影响，采用电磁悬浮装置对含0.5%P和1.0%P的Al-60%Si合金进行了深度过冷处理。通过分析固态试样的HSV动态图像和扫描电镜图像，研究了Si相的形貌演变和生长方式。结果表明：随着过冷度的增加，Si相的形貌由大条形变为粗块状和规则排列的枝晶，再变为球状和棒状，相应的生长方式由多面生长到混合生长，再到无多面生长。P通过提高Si相的成核速率来细化Si相的尺寸。随着P含量的增加，生长模式转变的临界过冷量减小，实验结果与理论预测结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.