N_2-H_2-H_2S雰囲気中におけるNi基超合金の高温硫化挙動 Sulfidation Behavior of a Nickel-base Superalloy in N_2-H_2-H_2S Mixtures

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著者

    • 八鍬 浩 YAKUWA Hiroshi
    • 株式会社荏原総合研究所技術開発研究所材料技術開発室 Materials Lab., Ebara Research Co., Ltd.
    • 成田 敏夫 NARITA Toshio
    • 北海道大学大学院工学研究科分子化学専攻界面制御工学講座 Research Group Interface Control Engineering, Graduate School of Engineering, Hokkaido University

抄録

Sulfidation behavior of a nickel-base superalloy, AISI 685, was investigated in N<sub>2</sub>-H<sub>2</sub>-H<sub>2</sub>S mixtures within a temperature range of 673 to 873K. Pure Ni and Cr, which are two main components of AISI 685, were also tested as references. Uniform internal sulfidation occurred on AISI 685 at a lower sulfur-partial-pressure than the dissolution pressure of Ni<sub>3</sub>S<sub>2</sub> whether stressed or not. On the other hand, grain boundary sulfidation occurred on AISI 685 at a higher sulfur-partial-pressure than the dissolution pressure of Ni<sub>3</sub>S<sub>2</sub> at 873K under a static stress. Whereas no grain boundary sulfidation was observed at or below 773K even under a stress of 588MPa. The grain boundary penetrations were brought by sulfidation of Ti, Mo, Al and Cr near the alloy grain boundaries. The time dependence of the grain boundary sulfidation length followed a parabolic rate law.

収録刊行物

  • 材料と環境 : zairyo-to-kankyo

    材料と環境 : zairyo-to-kankyo 48(5), 299-306, 1999-05-15

    Japan Society of Corrosion Engineering

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各種コード

  • NII論文ID(NAID)
    10002053766
  • NII書誌ID(NCID)
    AN10235427
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09170480
  • NDL 記事登録ID
    4727279
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-266
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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