Atomic transport in B2-ordered Al(Fe,Ni) alloys: Tracer-interdiffusion couple approach

Authors :: Vladimir A. Esin
B.S. Murty
Sergiy V. Divinski
Kaustubh N. Kulkarni
Gerhard Wilde
G. Mohan Muralikrishna
Centre des Matériaux (MAT)
MINES ParisTech - École nationale supérieure des mines de Paris
Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
Source :: Intermetallics, Intermetallics, Elsevier, 2020, 126, pp.106920. ⟨10.1016/j.intermet.2020.106920⟩
Publication Year :: 2020
Publisher :: HAL CCSD, 2020.
Abstract: A novel tracer-interdiffusion couple technique is utilized to measure the concentration-dependent tracer- (59Fe) diffusion coefficients in the B2-ordered Al50(Ni,Fe)50 alloys at 1373 K in a single experiment. The influence of variable molar volume on the diffusion coefficients is examined. The tracer diffusion coefficients determined under chemical gradients are shown to be in an excellent agreement with the diffusivities measured independently for homogeneous alloys. The tracer diffusion coefficients of Fe are observed to increase strongly with an increase of the Fe concentration. Strong up-hill diffusion of Al hinders a reliable determination of the interdiffusion coefficients with a single diffusion couple. The results confirm a high potential of the tracer-interdiffusion couple technique for producing highly accurate concentration-dependent mobility data in multi-component systems.

Language :: English
ISSN :: 09669795
Database :: OpenAIRE
Journal :: Intermetallics, Intermetallics, Elsevier, 2020, 126, pp.106920. ⟨10.1016/j.intermet.2020.106920⟩
Accession number :: edsair.doi.dedup.....6ba835b104b86eb65190a99005aa80ae
Full Text :: https://doi.org/10.1016/j.intermet.2020.106920⟩

Full Text Access

Tools