Simple Approach for Evaluating the Possibility of Sluggish Diffusion in High-Entropy Alloys

被引：9
|
作者：
Koyama, Toshiyuki [1 ]
Tsukada, Yuhki [1 ]
Abe, Taichi [2 ]
机构：
[1] Nagoya Univ, Dept Mat Design Innovat Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan
[2] Natl Inst Mat Sci, Res Ctr Struct Mat, Tsukuba, Ibaraki 3050047, Japan
来源：
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2022年 / 43卷 / 01期
关键词：
CALPHAD method; diffusion; high-entropy alloys; mobility; theoretical approach; CR-FE-NI; MN-NI; TRACER DIFFUSION; SOLID-SOLUTION; CO-FE; INTERDIFFUSION; DIFFUSIVITIES; MOBILITIES; COCRFENI;
D O I：
10.1007/s11669-022-00938-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The occurrence of sluggish diffusion (SD) in high-entropy alloys (HEAs) has been investigated experimentally and theoretically during the last decade, and currently, SD as a core effect of HEAs is being questioned. In this study, we propose a simple approach for evaluating the possibility of SD in HEAs based on the theoretical framework of atomic mobility functions in conjunction with the CALPHAD-based thermodynamics. The results obtained are as follows: (1) there is no relationship between configurational entropy and SD, (2) the influence of thermodynamic and mobility interactions among atoms on SD should become weaker with an increasing number of elements, and (3) the short-range order induced from the core effect of atomic distortion in HEAs may be related to SD.
引用
收藏
页码：68 / 77
页数：10
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