Concentrations at interfaces in binary alloys

摘要: Abstract Concentration profiles across interfaces and at a free surface of binary f.c.c. alloy are computed, using the regular nearest-neighbour approximation. The γ-Fe-Cu system serves as example, most calculations made for temperature where mutual solubilities 4 at. % coherent interface energy is slightly anisotropic (but rather strongly low temperatures) nearly indifferent to shift concentration-profile curve lattice planes. Computed concentration Fe-Cu solid solutions show substantial enrichment Cu. Incoherent approximated by planes containing 25% vacant sites. One then finds also appreciable Cu grain boundaries incoherent interphase interface. chemical crystallographic phase boundary about 8 apart. It suggested that an electronic double layer responsible found experimentally interphase.