Microscopic work function anisotropy and surface chemistry of 316L stainless steel using photoelectron emission microscopy

N. Barrett; O. Renault; H. Lemaître; P. Bonnaillie; F. Barcelo; F. Miserque; M. Wang; C. Corbel

Microscopic work function anisotropy and surface chemistry of 316L stainless steel using photoelectron emission microscopy

N. Barrett ^{1, *} O. Renault ² H. Lemaître ^{3, 4} P. Bonnaillie ⁵ F. Barcelo ⁶ F. Miserque ⁷ M. Wang ⁸ C. Corbel ⁸

* Corresponding author

1 LENSIS - Laboratoire d'Etude des NanoStructures et Imagerie de Surface

SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay

2 CEA-LETI - Laboratoire d'Electronique et des Technologies de l'Information

3 Department of Physics and Astronomy [Aarhus]

4 UCP - Université de Cergy Pontoise

5 SRMP - Service de recherches de métallurgie physique

DMN - Département des Matériaux pour le Nucléaire : DEN/DMN

6 LA2M - Laboratoire d'Analyse Microstructurale des Matériaux

DMN - Département des Matériaux pour le Nucléaire : DEN/DMN/SRMA

7 DEN/DANS/DEPC/SCCME/LECA

8 LSI - Laboratoire des Solides Irradiés

Abstract : 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 photo-electron 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 Cr 2 O 3 surface oxide and a higher concentration of defective oxygen sites.

Keywords : X-ray photoelectron spectroscopy X-ray photoelectron emission microscopy EBSD Austenitic steel Work function

Document type :

Journal articles

Domain :

Physics [physics]

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Microscopic work function anisotropy and surface chemistry of 316L stainless steel using photoelectron emission microscopy

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