Abstract
Auger electron spectroscopy has been used to study the surface segregation in five binary iron-cobalt alloys, the concentration of cobalt varying from 5.4 to 88.6 at%. Enrichment of cobalt at the surface was observed in all the alloys and the extent of enrichment was maximum in the alloy containing the minimum concentration of cobalt. These results were in agreement with those of Bevolo who has reported the segregation of cobalt in iron-cobalt alloy but were in contradiction to those reported by Morán-López and Wise who have observed an enrichment of iron at the surface of Fe-50%Co alloy. The observations made in the present work were consistent with the trend predicted by some current theoretical models.
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