The surface layers of pure iron, high-carbon steel and stainless steel, ion implanted with 1 X 10 17 Sn+ cm-2 , have been characterized by means of 119Sn conversion electrons Mossbauer scattering. The intermetallic phases existent in the as-implanted samples are determined, and then the thermal decomposition of these phases are established. The phase transformations observed in the treated surfaces agree reasonably well with the phase diagrams reported in the literature for stoichiometric intermetallic phases formed in bulk.
The surface layers of high-carbon and stainless steel samples, treated by both direct ion implantation of Sn+ ions and radiation enhanced diffusion of tin, are analyzed by means of Rutherford backscattering and 119Sn and 57Fe conversion electron Mössbauer spectroscopy. The intermetallic phases formed in the treated surfaces are determined and their thermal evolution is established. The compositions and phase transformations observed in the surfaces of the samples treated by both direct ion implantation and radiation-enhanced diffusion are very similar, and this similarity indicates that these two treatment processes are essentially equivalent for practical applications.
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