Zn4Al锌合金中裂膜缺陷的抗愈合性

IF 1.3 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Cast Metals Research Pub Date : 2023-04-14 DOI:10.1080/13640461.2023.2202078

Hanieh Soltani Banavandi, R. Raiszadeh

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引用次数: 0

摘要

摘要研究了浸入Zn4Al液体合金中的两层双膜缺陷之间结合的可能性，方法是在熔炉中保持两个棒彼此接触，并将它们之间的气氛保持在不同的时间，最长可达48 h.然后通过SEM、EDS和XRD对棒材基底上的氧化物层进行研究。棒材基底上的氧化层被鉴定为ZnAl2O4。当氧化物层附近的Al浓度显著降低时，该相转变为ZnO。这种转变是可逆的，当在层附近提供足够的Al浓度时，ZnO变回ZnAl2O4。然而，研究表明，这些转化，以及由此产生的裂膜缺陷的愈合，不太可能发生在浸没在Zn4Al熔体中的实际裂膜缺陷中。

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Resistance to healing of bifilm defects in Zn4Al zinc alloy

ABSTRACT The possibility of bonding between two layers of a bifilm defect submerged in a Zn4Al liquid alloy is studied by maintaining two bars in contact with each other and the atmosphere trapped between them in a furnace for different times up to 48 h. The oxide layers on the bases of the bars were then studied by SEM, EDS, and XRD. The oxide layers on the bars' bases were identified as ZnAl2O4. This phase transformed to ZnO when the concentration of Al in the vicinity of the oxide layers decreased dramatically. This transformation was reversible, and ZnO changed back to ZnAl2O4 when an adequate Al concentration was provided near the layers. However, it is shown that these transformations, and hence the healing of bifilm defects, are improbable to occur in actual bifilm defects submerged in Zn4Al melt.

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来源期刊

International Journal of Cast Metals Research 工程技术-冶金工程

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

7.5 months

期刊介绍： The International Journal of Cast Metals Research is devoted to the dissemination of peer reviewed information on the science and engineering of cast metals, solidification and casting processes. Assured production of high integrity castings requires an integrated approach that optimises casting, mould and gating design; mould materials and binders; alloy composition and microstructure; metal melting, modification and handling; dimensional control; and finishing and post-treatment of the casting. The Journal reports advances in both the fundamental science and materials and production engineering contributing to the successful manufacture of fit for purpose castings.