The Marker Conservation Law in Multiphase Systems

The knowledge of the fundamental understanding such as composition–structure–mechanical property relationships caused by Kirkendall effect is in progress and is used to optimize mechanical properties of materials. In this paper the multiphase systems with low non-stoichiometry are discussed. It is shown that in such systems the drift velocity can be approximated as constant in each phase and determined by Wagner’s integral diffusivity. In this paper the binary in Ni–Ti alloy is discussed; however, the method can be applied to multicomponent systems. The results of the calculations are compared with experimental data.