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Developing Mg-Zn surface alloy by friction surface allosying: In vitro degradation studies in simulated body fluids
International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-07-13 , DOI: 10.1007/s12613-020-2053-9
Venkateswarlu Badisha , Shabana Shaik , Ravikumar Dumpala , B. Ratna Sunil

A new variant of friction-assisted process named friction surface alloying (FSA) for developing surface alloys was demonstrated in the present work. In FSA, the dispersed phase is melted and allowed to react with the matrix material to form an alloy at the surface of a metallic substrate. In the present work, magnesium (Mg) sheets and zinc (Zn) powder were selected, and fine grained (∼3.5 µm) Mg-Zn surface alloy with improved hardness was produced by FSA. X-ray diffraction studies confirmed the formation of intermetallic phases of Mg and Zn at the surface. From the in vitro degradation studies carried out by immersing in simulated body fluids, a lower corrosion rate was observed for the Mg-Zn surface alloy compared with pure Mg. The surface morphologies after immersion studies indicated large degraded areas on the base Mg compared with Mg-Zn. The results demonstrate the potential of FSA in developing Mg-based surface alloys without melting the substrate to impart better surface properties.



中文翻译:

通过摩擦表面合金化开发Mg-Zn表面合金:模拟体液中的体外降解研究

在本工作中,展示了一种新型的摩擦辅助工艺,称为摩擦表面合金化(FSA),用于开发表面合金。在FSA中,分散相熔化并使其与基体材料反应,从而在金属基材的表面形成合金。在当前的工作中,选择了镁(Mg)片和锌(Zn)粉末,并通过FSA生产了硬度提高的细晶粒(〜3.5 µm)Mg-Zn表面合金。X射线衍射研究证实了表面上Mg和Zn的金属间相的形成。从体外通过浸入模拟体液进行的降解研究发现,与纯Mg相比,Mg-Zn表面合金的腐蚀速率更低。浸没研究后的表面形态表明,与Mg-Zn相比,基础Mg的降解面积大。结果证明了FSA在开发基于Mg的表面合金而不熔化基材以赋予更好的表面性能方面的潜力。

更新日期:2020-07-13
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