Ti(0001)単結晶表面での水素吸収過程 Hydrogen Sorption by Ti(0001) Single Crystal Surfaces

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Hydrogen interaction with the Ti (0001) single crystal surface was investigated with Nuclear Reaction Analysis (NRA) using <SUP>1</SUP>H (<SUP>15</SUP>N, αγ) <SUP>12</SUP>C. In contrast to thin polycrystalline Ti-films, molecular H<SUB>2</SUB> adsorbs only with a small integral sticking coefficient on the single crystal surface even at 120 K and the H coverage saturates at 1.0 ML. Admission of atomic H at this temperature results in further hydrogen uptake, which saturates after absorption of an additional monolayer of H into subsurface sites. The H diffusion remains restricted up to240 K, causing accumulation of absorbed H in a shallow region of only7 nm depth beneath the surface under atomic H exposure conditions. With a maximum of10 at.% the H-concentration in this thin hydride overlayer remains far below the bulk solubility limit of TiH<SUB>2</SUB>. Only above240 K the observed H distributions along the concentration gradient into the bulk are in agreement with extrapolated diffusion data for α-Ti.

収録刊行物

  • 真空

    真空 45(5), 458-462, 2002-05-20

    The Vacuum Society of Japan

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各種コード

  • NII論文ID(NAID)
    10008831103
  • NII書誌ID(NCID)
    AN00119871
  • 本文言語コード
    JPN
  • 資料種別
    SHO
  • ISSN
    05598516
  • NDL 記事登録ID
    6193467
  • NDL 雑誌分類
    ZN15(科学技術--機械工学・工業--流体機械)
  • NDL 請求記号
    Z16-474
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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