Abstract
The multi-principal high-entropy alloys (HEAs) are promising new alloys. However, it is a challenge to screen out the suitable composition from the diverse combinations. Referring to the prototype AuCu3 with AB3-L12 structure, where it becomes a face-centered cubic (fcc) structure if element A and B are the same element, the site occupying tendencies of the elements and thermodynamic functions are predicted by using the sublattice model supported with first-principles total energy calculations. By considering the Gibbs energy of formation and the configurational entropy, the fcc HEAs in available literatures are examined, and the results of the quinary system with equal-atomic composition CoFeMnNiM and the hexbasic system with equal-atomic composition CoFeMnNiSmM are reported, respectively, where the element M is selected from the rest of the periodical table. When M=Cr, Zn, Ru, Rh, Pd, Re, Os, Ir, or Pt in the quinary systems CoFeMnNiM and when M=Ru, Pd, or Pt in the hexbasic systems CoFeMnNiSmM, respectively, the alloys are recommended to be potential fcc HEAs. The new approach opens a new way to mine the rich ores of HEAs.
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Foundation item: the National Natural Science Foundation of China (Nos. 50971043 and 51001027), the National Innovation Experiment Program for University Students of China (No. 091038628), the Natural Science Foundation of Fujian Province (Nos. 2009J01239 and 2010J01278), the Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars of Ministry of Education of China (No. LXKQ08050), and the Program for New Century Excellent Talents in University of Fujian Provincial (No. JA10013)
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Zhang, Ch., Lin, Mh., Wu, B. et al. Explore the possibility of forming fcc high entropy alloys in equal-atomic systems CoFeMnNiM and CoFeMnNiSmM . J. Shanghai Jiaotong Univ. (Sci.) 16, 173–179 (2011). https://doi.org/10.1007/s12204-011-1113-8
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DOI: https://doi.org/10.1007/s12204-011-1113-8