Thermodynamic grain size stabilization models: An overview

  • Saber M
  • Koch C
  • Scattergood R
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Abstract

Grain boundaries in a nanocrystalline microstructure produce an increase in the excess free energy of the system. Grain growth is a consequence of the thermodynamic driving force reducing this excess. Thermodynamic stabilization is an approach based on eliminating the driving force by suitable alloy additions that can produce a metastable equilibrium state at the nanoscale grain size, as opposed to kinetic stabilization where the grain growth mobility is restricted by pinning and/or drag mechanisms. The present paper reviews and compares various models proposed for thermodynamic stabilization.

Author-supplied keywords

  • Grain boundary segregation
  • Grain growth
  • Nanocrystalline materials
  • Thermal stability

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Authors

  • Mostafa Saber

  • Carl C. Koch

  • Ronald O. Scattergood

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