Journal
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Volume 195, Issue -, Pages 117-124Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.elspec.2014.05.015
Keywords
Austenitic steel; Work function; X-ray photoelectron emission microscopy; EBSD; X-ray photoelectron spectroscopy
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Funding
- CEA RACOC-2 programme
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We have studied the variation in the work function of the surface of sputtered cleaned 316L stainless steel with only a very thin residual oxide surface layer as a function of grain orientation using X-ray photoelectron emission microscopy (XPEEM) and Electron Backscattering Diffraction. The grains are mainly oriented [1 1 1] and [1 0 1]. Four distinct work function values spanning a 150 meV energy window are measured. Grains oriented [1 1 1] have a higher work function than those oriented [1 0 1]. From core level XPEEM we deduce that all grain surfaces are Cr enriched and Ni depleted whereas the Cr/Fe ratio is similar for all grains. The [1 1 1] oriented grains show evidence for a Cr2O3 surface oxide and a higher concentration of defective oxygen sites. (C) 2014 Elsevier B.V. All rights reserved.
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