Thermochemical data of alloys from photoelectron spectroscopy

Abstract

It is shown, that the partial solution energy of an atom in an alloy contributes to the core level binding energy of this atom in the alloy. One can therefore use in turn core level binding energy shifts in alloys to determine the formation energy of a binary alloy. It is demonstrated that for the alloy systems PdAg, NiCu, AuCu, PdNi and PdCu there is good agreement between the thermochemical data measured directly and those extracted from the photoelectron spectra. In addition for an alloy system A xB 1−x the partial solution energies of the atoms A + 1 and B + 1 in the dilute ternary systems A + 1 in A, xb 1−x and B + 1 in A, xb l−x are obtained from the core level binding energy shifts. The approach is then used to predict the formation energies for the alloy systems CuZr, PdZr, and PdTi from their core level binding energy shifts as measured by photoelectron spectroscopy.