Comments on "Experimental assessment of the thermodynamic factor for diffusion in CoCrFeNi and CoCrFeMnNi high entropy alloys". (November 2019)

• Record Type: Journal Article
• Authors: Belova, Irina V.; Murch, Graeme E.
• Is Part Of: Scripta materialia. Number 172(2019)
• Page Start: 110
• Page End: 112
• Publication Date: 2019-11
• Subjects: High entropy alloys -- Diffusion -- Interdiffusion -- Quasi-binary -- Pseudo-binary; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.07.013
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: In this contribution, as comments to the paper in Scripta Materialia, v.157, p.81, 2018, we show that the pseudo-binary approach for analysis of interdiffusion in multicomponent alloys has its reference value of the Manning factor (vacancy-wind factor) that is very different from true binary interdiffusion. In true binary interdiffusion, this factor is usually compared with unity. In the pseudo-binary analysis this reference value must be changed to the inverse of N 1 + N 2, where N i are the compositions (mole fractions), and components 1 and 2 are the atomic components that have different terminal compositions in the corresponding experiment.