Electron Microscopy Characterization of Hot-Pressed Al Substituted Li7La3Zr2O12

Abstract

Hot-pressing was used to prepare a dense (97% relative density) cubic Al substituted Li7La3Zr2O12 material at temperatures lower than typically used for solid-state and/or liquid phase sintering. Electron microscopy analysis revealed equiaxed grains, grain boundaries, and triple junctions free of amorphous and second phases and no Al segregation at grain boundaries. These results suggest that Al2O3 and/or Al cannot act as a sintering aid by reducing grain boundary mobility. If Al2O3 acts as a sintering aid its main function is to enter the lattice as Al to increase the point defect concentration of the slowest moving species.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2012
Accession Number
ADA577813

Entities

People

  • J. L. Allen
  • J. Sakamoto
  • J. Wolfenstine

Organizations

  • Michigan State University

Tags

Communities of Interest

  • Human Systems

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Boundaries
  • Chemical Engineering
  • Chemistry
  • Crystal Lattices
  • Electron Microscopes
  • Electron Microscopy
  • Grain Boundaries
  • High Temperature
  • Hot Pressing
  • Liquid Phases
  • Materials
  • Materials Science
  • Microscopes
  • Microscopy
  • Military Research
  • Point Defects

Fields of Study

  • Materials science

Readers

  • Organic Chemistry
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics