Entropy-stabilized oxides
By Christina M. Rost, E. Sachet, T. Borman, Ali Moballegh, E. Dickey, D. Hou, Jacob L. Jones, Stefano Curtarolo, J. Maria. Nature Communications, 2015
2,860 citations recorded by the source corpus.
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 disorder provides an orthogonal strategy to imagine and discover new phases of crystalline matter and untapped opportunities for property engineering. The composition of oxide compounds controls many of their properties and electronic phases. Here, the authors show that entropy and configurational disorder can stabilize new phases of oxides, potentially enabling a better engineering of their properties.
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/3ec05e83b301d22fbca5f69c9a29215d7527c8cd
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Citations in the corpus
- Phase stability and mechanical properties of novel high entropy transition metal carbides (2019, background): “The k2 cI for each of the V, Nb, and Mo absorbers looks very similar, indicating that each of themetals has similar local surroundings [16].”
- High-Entropy Ceramics (2019, background): “[6], on the production of entropy stabilized metal oxides with rocksalt crystal structure, synthesized from equimolar CoO, CuO, MgO, NiO, and ZnO in a tube furnace at temperatures above 850°C.”