A concise and general formula is introduced to obtain ab initio pair potentials between atoms across a metal-ceramic interface by inversion of the adhesive energies of the interface. Derivation of interfacial potentials Φ_(Ag-Mg) and Φ_(Ag-O) from ab initio adhesive energies is performed by applying the formula to the Ag/MgO(001) interface. Transferability of these potentials at Ag/MgO(100), Ag/MgO(110) and Ag/MgO(111) interfaces is discussed.
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