Abstract
AbstractThis paper presents an alternative derivation of a discrete lattice regular solution model for computing the composition profile across an interphase boundary in a three component system. The model is applied to the calculation of the composition profiles across interfaces separating Ni-rich and Ag-rich phases in several Ni-Ag-X ternary systems (where X stands for Cu, Pd or Au). The results show that segregation to a (001) Ni-Ag interface is expected to be strong in the case of Cu, moderate in the case of Pd, and weak in the case of Au. It is also found that the Gibbsian interfacial excess of these segregants decreases with increasing temperature.
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