Entropy-stabilized oxides

Configurational disorder can be compositionally engineered into mixed oxide by populating a single sublattice with many distinct cations. The formulations promote novel and entropy-stabilized forms of crystalline matter where metal cations are incorporated in new ways. Here, through rigorous experiments, a simple thermodynamic model, and a five-component oxide formulation, we demonstrate beyond reasonable doubt that entropy predominates the thermodynamic landscape, and drives a reversible solid-state transformation between a multiphase and single-phase state. In the latter, cation distributions are proven to be random and homogeneous. The findings validate the hypothesis that deliberate configurational…

• NS
  National Science Foundation

  Awards: DE-AC02-05CH11231, N00014-15-1-2863
• UD
  U.S. Department of Defense

  Awards: DE-AC02-05CH11231, N000141310635, N00014-15-1-2863
• UD
  U.S. Department of Energy

  Awards: -AC02-05CH11231, 05CH11231, AC02-05CH11231, DE-AC02, DE-AC02-05CH11231, DE-AC02-
• NC
  North Carolina State University
• MU
  Multidisciplinary University Research Initiative

  Award: N00014-15-1-2863
• OO
  Office of Naval Research

  Awards: DE-AC02-05CH11231, N000141310635, N00014-15-1-2863, N00014
• AR
  Army Research Office

  Awards: DE-AC02-05CH11231, W911NF-14-0285, W911NF