Oxidation of NiAl(110)

Technical Report · Sun Oct 01 00:00:00 EDT 1989

OSTI ID:7092784

Brown, W W

The oxidation of nickel aluminium is a relatively unstudied process. We present a study on the oxidation of nickel aluminum specifically the (110) surface. We have studied the oxidation of NiAl(110), utilizing the following measurements: auger electron spectroscopy, x-ray photoelectron spectroscopy, surface second harmonic generation, and work function change. We have found that oxygen is weakly incorporated on the NiAl(110) surface. The oxygen that is absorbed interacts with the aluminum in the substrate, exclusively, forming an aluminum oxide. Although, the oxide formed is geometrically or chemically different than Al{sub 2}O{sub 3}. There is little or no direct interaction between the nickel in the substrate and the adsorbed oxygen. Indirectly, the nickel effects the sticking coefficient, weakening the incorporation of the oxygen and the surface. We feel the first stage of adsorption is surface followed by subsurface incorporation. The oxygen is bound weakly enough that the oxygen on the surface is desorbed when the exposure stops and a diffusion process causes the oxygen from the bulk to migrate to the surface region. 42 refs., 28 figs.

• Research Organization: Montana State Univ., Bozeman, MT (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FG22-85PC80518
• OSTI ID: 7092784
• Report Number(s): DOE/PC/80518-T13; ON: DE90015645
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010400* -- Coal
Lignite
& Peat-- Processing
36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
AUGER ELECTRON SPECTROSCOPY
CHEMICAL REACTIONS
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
INTERMETALLIC COMPOUNDS
NICKEL ALLOYS
OXIDATION
PHOTOELECTRON SPECTROSCOPY
SPECTRA
SPECTROSCOPY
SURFACES