{"title":"Resistance to healing of bifilm defects in Zn4Al zinc alloy","authors":"Hanieh Soltani Banavandi, R. Raiszadeh","doi":"10.1080/13640461.2023.2202078","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":13939,"journal":{"name":"International Journal of Cast Metals Research","volume":"36 1","pages":"45 - 55"},"PeriodicalIF":1.3000,"publicationDate":"2023-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Cast Metals Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/13640461.2023.2202078","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
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.
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.
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