Abstract
The interaction of water vapor and oxygen with polycrystalline Ni3Fe has been studied by Auger electron spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermal desorption. Water adsorbs molecularly on the surface at or below 150 K. Between 150 and 200 K, some adsorbed water molecules desorb in vacuum, while others dissociate into hydroxyls, atomic oxygen, and hydrogen. XPS studies suggest iron to be the active species in controlling the dissociation of water on polycrystalline Ni3Fe surface. Water dissociation into atomic hydrogen is greatly suppressed by the presence of small concentrations of oxygen in water vapor.
Original language | English (US) |
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Pages (from-to) | 283-288 |
Number of pages | 6 |
Journal | Intermetallics |
Volume | 4 |
Issue number | 4 |
DOIs | |
State | Published - 1996 |
Funding
The authors wish to thank Dr C. T. Liu of Oak Ridge National Laboratoryf or supplyingt he Ni,Fe alloy. This work was supported by the National ScienceF oundation, Grant No. DMR 9410701.
Keywords
- A. Model systems
- B. Environmental embrittlement
- B. Hydrogen embrittlements
ASJC Scopus subject areas
- General Chemistry
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry