SURFACE-COMPOSITION OF NI-10AT-PERCENT-AL(111) IN THERMODYNAMIC-EQUILIBRIUM

Authors
SCHULTHESS T WETLI E ERBUDAK M
Citation
T. Schulthess et al., SURFACE-COMPOSITION OF NI-10AT-PERCENT-AL(111) IN THERMODYNAMIC-EQUILIBRIUM, Surface science, 320(3), 1994, pp. 120000095-120000100
Citations number
29
Categorie Soggetti
Chemistry Physical
Journal title
Surface science → ACNP
ISSN journal
00396028
Volume
320
Issue
3
Year of publication
1994
Pages
120000095 - 120000100
Database
ISI
SICI code
0039-6028(1994)320:3<120000095:SONIT>2.0.ZU;2-O
Abstract
Ion-scattering spectroscopy using 1000 eV He ions was applied to deter mine the equilibrium concentration at the (111) surface of Ni-10at%A1. Special care was taken to eliminate the falsification of the results by sulfur segregation as well as by the effects of sputtering. A techn ique for rapid determination of the surface concentrations is presente d. It was found that the surface has to be annealed at 800 degrees C o r higher to reach the equilibrium with 25 at% A1. The surface composit ion remains unchanged if the temperature is subsequently varied betwee n 700 degrees C and 1000 degrees C.