Surface segregation in random alloys
- 1 May 1976
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 6 (5), 725-738
- https://doi.org/10.1088/0305-4608/6/5/015
Abstract
The free energy of a semi-infinite model binary alloy is set up. It is described essentially by two physically identifiable parameters. On minimizing this free energy under suitable constraints in a Bragg-Williams type approximation, it is shown that the composition varies as one moves in from the surface into the bulk. This 'surface segregation' of a constituent is studied under different conditions. Agreement has been obtained with the experimental results on Ni-Au alloy.Keywords
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