Abstract
The interaction of water vapor with single crystal Ni 3(Al,Ti) and polycrystalline Ni 3Fe, with and without the presence of oxygen, has been studied with Auger electron spectroscopy, photoemission spectroscopy, thermal desorption and isotope exchange. Water dissociates to produce atomic hydrogen above 200 K on both Ni 3(Al,Ti) and Ni 3Fe surfaces. For Ni 3(Al,Ti), the reaction is structure-sensitive. Pre-adsorbed or co-adsorbed oxygen on Ni 3(Al,Ti) and Ni 3Fe significantly suppresses hydrogen production due to water dissociation. This suppression process occurs more efficiently on Ni 3Fe than Ni 3(Al,Ti).
Original language | English (US) |
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Title of host publication | Design Fundamentals of High Temperature Composites, Intermetallics, and Metal-Ceramics Systems |
Editors | Ray Y. Lin, Y.Austin Chang, Ramana G. Reddy, C.T. Liu |
Pages | 251-269 |
Number of pages | 19 |
State | Published - Jan 1 1996 |
Event | Proceedings of the 1996 125th TMS Annual Meeting - Anaheim, CA, USA Duration: Feb 4 1996 → Feb 8 1996 |
Other
Other | Proceedings of the 1996 125th TMS Annual Meeting |
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City | Anaheim, CA, USA |
Period | 2/4/96 → 2/8/96 |
ASJC Scopus subject areas
- Geology
- Metals and Alloys