Control of Interface Structure for the Development of Nanostructured Materials

Abstract

In this investigation, it was shown that the oxygen partial pressure affects considerably the grain boundary structure (morphology) of BaTiO3, a model oxide, and further the grain growth behaviour. There was a close correlation between the boundary structure and grain growth behaviour. It was possible, for the first time, to prepare different types of microstructures by properly controlling the oxygen partial pressure. This investigation also showed that with grain growth above a eutectic temperature, dry grain boundaries become wet due to the accumulation of solutes and the thickness of liquid films formed at the boundaries increases. Quantification of boundary structure and the chemical analysis of boundary segregation should be needed in subsequent investigations in order to provide more conclusive data for the new findings.

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Document Details

Document Type
Technical Report
Publication Date
Feb 16, 2007
Accession Number
ADA473103

Entities

People

  • Suk-joong L. Kang

Organizations

  • KAIST

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Boundaries
  • Ceramic Materials
  • Chemical Analysis
  • Crystals
  • Grain Boundaries
  • Grain Growth
  • Grain Size
  • Materials
  • Materials Processing
  • Materials Science
  • Microstructure
  • Nanomaterials
  • Partial Pressure
  • Single Crystals

Fields of Study

  • Materials science

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene