Segregation of Si and Sn to the Fe(100) Surface in the Fe-6.2% Si-0.03% Sn Alloy

摘要

Surface segregation of Si and Sn and the site composition between them in a polycrystalline sample of an Fe-6.2% Si-0.03% Sn alloy were reported in a previous work by the authors. In the experiments reported here a single crystal having the same composition as the polycrystalline sample was used. The following temperature dependence of segregation on the (100) surface was observed. At lower temperatures (25-400 C) C segregated to the surface. After heating at 500 C for 20 hours, Si was the only solute segregated to the (100) surface. At 600 C Sn segregated to the surface and replaced all the segregated Si on the surface.