Comments on 'A numerical method to determine interdiffusion coefficients of Cu6Sn5 and Cu3Sn intermetallic compounds'

摘要

Li et al. (Intermetallics 2013; 40:50-59) [1] published a paper on "A numerical method to determine interdiffusion coefficients of Cu6Sn5 and Cu3Sn intermetallic compounds". In section 5.1 of this paper, they stated that the Wagner's method can be used to calculate the integrated interdiffusion coefficients for an incremental diffusion couple only under the assumption of "constant molar volume" for all phases. They gave a detailed derivation. In this comments, we show however that one of the assumptions in their derivation is unphysical, which made them give wrong conclusions. We propose a modified derivation of Wagner's equation without the assumption of "constant molar volume". (c) 2015 Elsevier Ltd. All rights reserved.