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Influence of CrN surface compound on the initial stages of high temperature oxidation of ferritic stainless steel

机译：CrN表面化合物对铁素体不锈钢高温氧化初期的影响

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摘要

Segregation phenomena and formation of surface compounds on Fe-17Cr (ferritic stainless steel) were studied at temperatures up to 800℃ upon annealing and kinetically controlled oxidation by photoelec-tron spectroscopy and inelastic electron background analysis. The results revealed the formation of a chromium nitride surface compound during annealing in ultrahigh vacuum at temperatures exceeding 527℃. Surface enrichment of P, As, and other trace elements became more prominent at higher temperatures approaching 800℃ It was found that nitrogen was buried below the surface oxide layer during oxygen exposure, yet it had little effect on the rate of oxidation. However, the formation of CrN surface compound promoted the selective oxidation of Cr initially, which is of great importance in processing and application environments involving high temperature and controlled atmosphere conditions.
机译：通过光电子能谱和非弹性电子背景分析，研究了退火和动力学控制的氧化后，在高达800℃的温度下研究了Fe-17Cr（铁素体不锈钢）上的偏析现象和表面化合物的形成。结果表明，在超过527℃的超高真空退火过程中，氮化铬表面化合物的形成。在接近800℃的高温下，P，As和其他微量元素的表面富集变得更加突出。发现在暴露于氧气的过程中，氮被掩埋在表面氧化层下，但对氧化速率的影响很小。但是，CrN表面化合物的形成最初促进了Cr的选择性氧化，这在涉及高温和可控气氛条件的加工和应用环境中非常重要。

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  • 来源
    《Applied Surface Science》 |2011年第17期|p.7783-7791|共9页
  • 作者

    H. Ali-L(OE)ytty; P. Jussila; M. Hirsim(aE)ki; M. Valden;

  • 作者单位

    Surface Science Laboratory, Tampere University of Technology, P.O.B. 692, FIN-33101, Tampere, Finland;

    Surface Science Laboratory, Tampere University of Technology, P.O.B. 692, FIN-33101, Tampere, Finland;

    Surface Science Laboratory, Tampere University of Technology, P.O.B. 692, FIN-33101, Tampere, Finland;

    Surface Science Laboratory, Tampere University of Technology, P.O.B. 692, FIN-33101, Tampere, Finland;

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

    stainless steels; oxidation; surface segregation; photoelectron spectroscopy;

    机译：不锈钢;氧化表面偏析;光电子能谱;

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