TY - JOUR
T1 - Reactive interdiffusion of an Al film and a CoCrFeNi high-entropy alloy
AU - Zhang, Zaoli
AU - Ketov, Sergey V.
AU - Fellner, Simon
AU - Sheng, Huaping
AU - Mitterer, Christian
AU - Song, K.K.
AU - Gammer, C.
AU - Eckert, Jürgen
N1 - Publisher Copyright: © 2022 The Authors
PY - 2022/3/10
Y1 - 2022/3/10
N2 - Diffusion plays a significant role in phase formation and transformation in solid-state alloys. In order to determine the influence of element diffusion on the phase formation and transition behavior in a high-entropy alloy (HEA), a systematic study on the reactive diffusion of Al and a CoCrFeNi HEA was carried out. It is demonstrated that thermodynamic and kinetic effects play a coupled role in the phase evolution in the HEA, among which the thermodynamic effect governs the evolution of major phases. The diffusion direction of the elements is controlled by the Gibbs free energy gradient in front of the interface, while the sluggish diffusion effect does not play a dominant role during reactive diffusion. At an annealing temperature of 773 K, the enthalpy of mixing dominates the total energy and therefore has a significant impact on the phase evolution during reactive diffusion.
AB - Diffusion plays a significant role in phase formation and transformation in solid-state alloys. In order to determine the influence of element diffusion on the phase formation and transition behavior in a high-entropy alloy (HEA), a systematic study on the reactive diffusion of Al and a CoCrFeNi HEA was carried out. It is demonstrated that thermodynamic and kinetic effects play a coupled role in the phase evolution in the HEA, among which the thermodynamic effect governs the evolution of major phases. The diffusion direction of the elements is controlled by the Gibbs free energy gradient in front of the interface, while the sluggish diffusion effect does not play a dominant role during reactive diffusion. At an annealing temperature of 773 K, the enthalpy of mixing dominates the total energy and therefore has a significant impact on the phase evolution during reactive diffusion.
UR - http://www.scopus.com/inward/record.url?scp=85126599351&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2022.110530
DO - 10.1016/j.matdes.2022.110530
M3 - Article
SN - 0264-1275
VL - 216.2022
JO - Materials and Design
JF - Materials and Design
IS - April
M1 - 110530
ER -