Developing Mg–Zn surface alloy by friction surface allosying: In vitro degradation studies in simulated body fluids
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第7期
论文作者：Ravikumar Dumpala
文章页码：962 - 969
摘 要：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.
Ravikumar Dumpala3
3. Department of Mechanical Engineering, Visvesvaraya National Institute of Technology
摘 要：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.
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