Journal
PHYSICAL REVIEW MATERIALS
Volume 2, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.2.055004
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Funding
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Science and Engineering Division
- U.S. DOE [DE-AC02-07CH11358]
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From electronic-structure-based thermodynamic linear response, we establish chemical ordering behavior in complex solid solutions versus how Gibbs' space is traversed-applying it on prototype refractory A2 Ta-Nb-Mo-Whigh-entropy alloys. Near ideal stoichiometry, this alloy has anomalous, intricate chemical ordering tendencies, with long-ranged chemical interactions that produce competing short-range order (SRO) with a crossover to spinodal segregation. This atypical SRO arises from canonical band behavior that, with alloying, creates features near the Fermi surface (well defined even with disorder) that change to simple commensurate SROwith (un) filling of these states. Our results reveal howcomplexity and competing electronic effects control ordering in these alloys.
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