Experimental and theoretical study of tracer diffusion in a series of (CoCrFeMn)$_{100-x}$Ni$_x$ alloys

Autor:	Kottke, Josua, Utt, Daniel, Laurent-Brocq, Mathilde, Fareed, Adnan, Gaertner, Daniel, Perriere, Loic, Rogal, Lukasz, Stukowski, Alexander, Albe, Karsten, Divinski, Sergiy V., Wilde, Gerhard
Rok vydání:	2020
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	Tracer diffusion of all constituting elements is studied at various temperatures in a series of (CoCrFeMn)$_{100-x}$Ni$_x$ alloys with compositions ranging from pure Ni to the equiatomic CoCrFeMnNi high-entropy alloy. At a given homologous temperature, the measured tracer diffusion coefficients change non-monotonically along the transition from pure Ni to the concentrated alloys and finally to the equiatomic CoCrFeMnNi alloy. This is explained by atomistic Monte-Carlo simulations based on a modified embedded-atom potentials, which reveal that local heterogeneities of the atomic configurations around a vacancy cause correlation effects and induce significant deviations from predictions of the random alloy model. Comment: 16 pages; 10 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2003.09474 Zobrazit plný text záznamu View this record from Arxiv