中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 1 January 2025 |
（1. Testing Center, Yangzhou University, Yangzhou 225009, China;
2. School of Mechanical Engineering, Yangzhou University, Yangzhou 225009, China;
3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:The interdiffusion coefficients in Al0.2CoCrFeNi, CoCrCu0.2FeNi, and CoCrFeMn0.2Ni high-entropy alloys were efficiently determined by combining diffusion couple experiments and high-throughput determination of interdiffusion coefficients (HitDIC) software at 1273-1373 K. The results show that the addition of Al, Cu, and Mn to CoCrFeNi high-entropy alloys promotes the diffusion of Co, Cr, and Fe atoms. The comparison of tracer diffusion coefficients indicates that there is no sluggish diffusion in tracer diffusion on the thermodynamic temperature scale for the present Al0.2CoCrFeNi, CoCrCu0.2FeNi, and CoCrFeMn0.2Ni high-entropy alloys. The linear relationship between diffusion entropy and activation energy reveals that the diffusion process of atoms is unaffected by an increase in the number of components as long as the crystal structure remains unchanged.
Key words: Co-Cr-Fe-Ni; high-entropy alloy; diffusion; interdiffusivity; diffusion couple
