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An Auger Electron Spectroscopic Study of the Diffusion of Sulfur and Carbon in α-Iron

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Auger electron spectroscopy has been employed to study the diffusion of sulfur and carbon in α-iron. In the temperature range 25 to 500°C carbon preferentially segregates to the surface. From 400 to 700°C sulfur segregates to the surface while carbon is thermally desorbed. An Arrhenius analysis of the sulfur diffusion data yields an activation energy of 14.5 kcal/mol, which is consistent with a grain boundary diffusion process. The kinetics of carbon migration is complicated by the thermal desorption which makes Arrhenius analysis impossible.

Keywords: Auger electron spectroscopy; Surface analysis

Document Type: Research Article


Affiliations: Department of Chemistry, University of South Florida, Tampa, Florida 33620 and Neutron Devices Department, General Electric Company, St. Petersburg, Florida 33733

Publication date: May 1, 1977

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