Abstract
The interaction of water vapor and oxygen with NijfAl, Ti) and Ni3Fe were investigated using Auger electron spectroscopy, X-ray photo emission and thermal desorption. These studies showed that water dissociates on Nij(Al, ,Ti) (001) and polycrystalline NijFe to produce atomic hydrogen above 200K, while remaining intact when exposed to Ni3(Al, Ti) (111). In addition, pre-adsorbed or co-adsorbed oxygen on these surfaces strongly suppresses hydrogen production due to water dissociation. It was shown that adsorbed oxygen reacts with water vapor to produce surface hydroxyls, thus quenching the production of atomic hydrogen. Recent studies revealed an unexpected embrittling effect of boron in NijAl in dry hydrogen. Experimen' were proposed to elucidate the different possible roles of boron.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 104-105 |
| Number of pages | 2 |
| Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
| Volume | 9 |
| Issue number | SUPPL. 1 |
| State | Published - 1999 |
Keywords
- Interaction
- Intermetallics
- Ni3(al, ti)
- Ni3fe
ASJC Scopus subject areas
- Condensed Matter Physics
- Geotechnical Engineering and Engineering Geology
- Metals and Alloys
- Materials Chemistry
