Competitive surface interactions of water vapor and oxygen on Ni 3(Al, Ti) and Ni 3Fe surfaces

W. J. Chia*, Yip-Wah Chung

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish (US)
Title of host publicationDesign Fundamentals of High Temperature Composites, Intermetallics, and Metal-Ceramics Systems
EditorsRay Y. Lin, Y.Austin Chang, Ramana G. Reddy, C.T. Liu
Pages251-269
Number of pages19
StatePublished - Jan 1 1996
EventProceedings of the 1996 125th TMS Annual Meeting - Anaheim, CA, USA
Duration: Feb 4 1996Feb 8 1996

Other

OtherProceedings of the 1996 125th TMS Annual Meeting
CityAnaheim, CA, USA
Period2/4/962/8/96

ASJC Scopus subject areas

  • Geology
  • Metals and Alloys

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