視斜角入射Ｘ線回折法による鋼板イオン窒化層の分析

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タイトル別名
  • Analysis of ion-nitrided layers on steel sheet by grazing incidence XRD.
  • シシャカク ニュウシャ Xセン カイセツホウ ニ ヨル コウハン イオン チッ

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説明

Ion-nitrided layers formed on a steel sheet were analyzed by the grazing incidence X-ray diffraction method. A commercial rotating anode X-ray diffractometer combined with a thin-film measurement attached was employed. A sample was prepared by ion-nitriding a cold-stripping steel sheet (1 mm thickness, as rolled) under the following conditions : 50% N2-50% H2 atmosphere, 800 Pa, at 400°C, and nitriding time of 1 h. The total thickness of the nitrided layers was about 1.2 μm. At X-ray incident angles below 0.4°, the diffraction profiles only of nitrided layers were obtained without the interference by α-Fe diffraction peaks from the steel. The incident angular dependence of X-ray diffraction profile was examined in detail. The glancing angular dependence of X-ray diffraction intensity ratios showed that the ε-Fe2.5 N phase was present on the surface and the γ'-Fe4N was under the ε-phase in the sample. The X-ray penetration depths and the diffraction intensities were theoretically calculated as a function of glacing angle for the multilayer sample. The calculated penetration depths and the calculated intensities were in good agreement with the experimental results.

収録刊行物

  • 分析化学

    分析化学 38 (10), 500-504, 1989

    公益社団法人 日本分析化学会

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