Surface spectroscopy and temperature-programmed desorption studies of the interaction of water vapor with Ni3(Al, Ti) (100) and (111) surfaces as a function of temperature

W. J. Chia*, Y. W. Chung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The interaction of water vapor with single crystal Ni3(Al, Ti) has been studied with Auger electron spectroscopy, photoemission spectroscopy and thermal desorption. Water adsorbs molecularly onto the (111) and (100) surfaces at 140 K. When warmed up to room temperature, water remains as an intact molecule on (111), but dissociates to surface hydroxyl and atomic oxygen on (100). The latter process is accompanied by the evolution of hydrogen and oxidation of Al. It appears that the dissociation of water is structure-sensitive and that Al is the active species in controlling the dissociation of water on Ni3Al surfaces.

Original languageEnglish (US)
Pages (from-to)505-509
Number of pages5
JournalIntermetallics
Volume3
Issue number6
DOIs
StatePublished - 1995

Keywords

  • embrittlement
  • intermetallics
  • photoemission
  • thermal desorption
  • water

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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