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Studies of Surface Composition and Phase Transition of Mo-5%Re(1O0)

Published online by Cambridge University Press:  25 February 2011

G. -C. Wang ,
D. M. Zehner  and
H. C. Eaton
G. -C. Wang
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 Louisiana State University, Baton Rouge, Louisiana 70803
D. M. Zehner
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
H. C. Eaton
Affiliation:
Louisiana State University, Baton Rouge, Louisiana 70803
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Abstract

Surface composition of a clean Mo-5%Re(100) alloy was determined quantitatively by Auger Electron Spectroscopy and X-Ray Photoelectron Spectroscopy. A slight enrichment of Re on the alloy surface was found at and below room temperatures and the result is consistent with the prediction by a graphical approach for segregation. The change of surface composition due to gas contamination and sputtering were also studied. In contrast to the pure Mo(100) surface where a structural phase transition occurs below room temperature, low energy electron diffraction showed no structural change down to 160 K. However, for H, CO, N chemisorptions and C segregation on the alloy surface, LEED patterns similar to the ones observed from a pure Mo(100) surface were observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 83: Symposium J – Physical and Chemical Properties of Thin Metal Overlayers and Alloy Surfaces , 1986 , 29
Copyright
Copyright © Materials Research Society 1987

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References

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