Premium
Oxidation of Ni 3 Al at low and high oxygen pressures
Author(s) -
Venezia A. M.,
Loxton C. M.
Publication year - 1988
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740110604
Subject(s) - x ray photoelectron spectroscopy , non blocking i/o , stoichiometry , oxygen , auger electron spectroscopy , chemistry , analytical chemistry (journal) , atmospheric pressure , oxide , nial , partial pressure , inorganic chemistry , intermetallic , alloy , nuclear magnetic resonance , catalysis , biochemistry , physics , oceanography , organic chemistry , chromatography , nuclear physics , geology
Oxidation of stoichiometric Ni 3 Al performed at elevated temperatures in low oxygen partial pressure and in atmospheric oxygen has been studied by x‐ray photoelectron spectroscopy, auger electron spectroscopy and x‐ray diffraction. At low oxidation pressure only the aluminum oxide is found although there is evidence for a phase change at temperatures above 600°C. At atmospheric pressure, NiO, NiAl 2 O 4 and Al 2 O 3 are obtained. The different behavior is discussed in terms of the relative standard free energy of formation of the oxides.