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High temperature oxidation of y/y'-strengthened Co-base superalloys

机译：y / y'强化Co基高温合金的高温氧化

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摘要

Isothermal oxidation was carried out on new y/y' Co-base superalloys of the system Co-Al-W-B. Appropriate B-contents lead to improved oxidation resistance and oxide layer adhesion. Oxidation at 800 and 900 °C results in formation of Co3O4, CoO, and complex oxides (containing Co, Al, and W). A continuous and protective inner alumina layer forms only at 800 °C. Furthermore, oxidation leads to phase transformation (y/y' to y/Co3W microstructure) at the matrix/oxide layer interface due to Al-depletion. The effect of additional alloying elements such as Ta, Cr, Nb, Si, V, Mo, and Ir on the oxidation behaviour was also investigated.
机译：在Co-Al-W-B系统的新型y / y'Co基高温合金上进行了等温氧化。适当的B含量导致改善的抗氧化性和氧化物层粘附性。在800和900°C的温度下氧化会形成Co3O4，CoO和复合氧化物（包含Co，Al和W）。仅在800°C时形成连续的保护性氧化铝内层。此外，由于铝的耗尽，氧化导致基体/氧化物层界面处的相变（y / y'到y / Co3W微结构）。还研究了其他合金元素（如Ta，Cr，Nb，Si，V，Mo和Ir）对氧化行为的影响。

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  • 来源
    《Corrosion science》 |2011年第5期|p.2027-2034|共8页
  • 作者

    L Klein; A. Bauer; S. Neumeier; M. G6ken; S. Virtanen;

  • 作者单位

    Department of Materials Science and Engineering, Institute for Surface Science and Corrosion (WW4), Martensstr. 7, University of Erlangen-Niirnberg, 91058 Erlangen, Germany;

    Department of Materials Science and Engineering, Institute of General Material Properties (WW1). Martensstr. 5, University ofErlangen-NiXmberg, 91058 Erlangen, Germany;

    Department of Materials Science and Engineering, Institute of General Material Properties (WW1). Martensstr. 5, University ofErlangen-NiXmberg, 91058 Erlangen, Germany;

    Department of Materials Science and Engineering, Institute of General Material Properties (WW1). Martensstr. 5, University ofErlangen-NiXmberg, 91058 Erlangen, Germany;

    Department of Materials Science and Engineering, Institute for Surface Science and Corrosion (WW4), Martensstr. 7, University of Erlangen-Niirnberg, 91058 Erlangen, Germany;

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

    A. Alumina; A. Boron; A. Co-base superalloy; C. High-temperature oxidation; C. Oxide layer;

    机译：A.氧化铝;A。硼;A。共基高温合金;C.高温氧化;C.氧化层;

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