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Third element effect in the surface zone of Fe-Cr-Al alloys

机译:Fe-Cr-Al合金表面区域的第三元素效应

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摘要

The third element effect to improve the high temperature corrosion resistance of the low-Al Fe-Cr-Al alloys is suggested to involve a mechanism that boosts the recovering of the Al concentration to the required level in the Al-depleted zone beneath the oxide layer. We propose that the key factor in this mechanism is the coexistent Cr depletion that helps to maintain a sufficient Al content in the depleted zone. Several previous experiments related to our study support that conditions for such a mechanism to be functional prevail in real oxidation processes of Fe-Cr-Al alloys.
机译:建议提高低铝Fe-Cr-Al合金的耐高温腐蚀性能的第三个元素效应涉及一种机制,该机制可将Al浓度的恢复提高到氧化层下方Al贫化区域中的所需水平。 。我们认为,该机制的关键因素是共存的Cr耗尽,这有助于在耗尽区中保持足够的Al含量。与我们的研究有关的一些先前实验支持这种机制发挥作用的条件在Fe-Cr-Al合金的真实氧化过程中占主导地位。

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  • 来源
    《Physical review》 |2010年第3期|033105.1-033105.4|共4页
  • 作者单位

    Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland and Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;

    Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland and Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;

    Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland and Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;

    Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland and Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;

    Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland and Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;

    Department of Information Technology, Abo Akademi, FI-20500 Turku, Finland;

    Department of Physics and Astronomy, University of Turku, Fl-20014 Turku, Finland and Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden;

    Department of Mathematics and Physics, Lappeenranta University of Technology, P.O. Box 20, FI-53851 Lappeenranla, Finland;

    Department of Mathematics and Physics, Lappeenranta University of Technology, P.O. Box 20, FI-53851 Lappeenranla, Finland;

    Research Institute for Solid State Physics and Optics, P.O. Box 49, Budapest H-1525, Hungary;

    Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden and Department of Physics and Materials Science, Uppsala University, SE-75121 Uppsala, Sweden;

    Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden Research Institute for Solid State Physics and Optics, P.O. Box 49, Budapest H-1525, Hungary and Department of Physics and Materials Science, Uppsala University, SE-75121 Uppsala, Sweden;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    metallic surfaces; composition, segregation; defects and impurities; total energy and cohesive energy calculations;

    机译:金属表面;组成;隔离;缺陷和杂质;总能量和内聚能计算;

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