Entropy-Stabilized Oxides

Abstract

Configurational disorder can be compositionally engineered into mixed oxide by populating asingle sublattice with many distinct cations. The formulations promote novel and entropystabilizedforms of crystalline matter where metal cations are incorporated in new ways.Here, through rigorous experiments, a simple thermodynamic model, and a five-componentoxide formulation, we demonstrate beyond reasonable doubt that entropy predominatesthe thermodynamic landscape, and drives a reversible solid-state transformation betweena multiphase and single-phase state. In the latter, cation distributions are proven tobe random and homogeneous. The findings validate the hypothesis that deliberateconfigurational disorder provides an orthogonal strategy to imagine and discover new phasesof crystalline matter and untapped opportunities for property engineering.

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Document Details

Document Type
Technical Report
Publication Date
Sep 29, 2015
Accession Number
AD1003149

Entities

People

  • Ali Moballegh
  • Christina M. Rost
  • Dong Hou
  • Edward Sachet
  • Elizabeth C Dickey
  • Jacob L. Jones
  • Jon-Paul Maria
  • Stefano Curtarolo
  • Trent Borman

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Chemical Analysis
  • Detectors
  • Diffraction
  • Diffractometers
  • Electron Microscopy
  • Materials
  • Materials Science
  • Measurement
  • Optics
  • Phase Diagrams
  • Phase Transformations
  • Scattering
  • Spectra
  • Thin Films
  • Transition Temperature
  • X-Ray Diffraction

Readers

  • Computational Fluid Dynamics (CFD)
  • Data Mining and Knowledge Discovery.
  • Systems Analysis and Design