Microstructure Studies of Refractory Polycrystalline Oxides

Abstract

The program was divided into three tasks within the general topic of microstructure effects on properties of polycrystalline oxides. The first task was concerned with the identification, origin, and elimination of strength limiting flaws in fine grained high density hot pressured alumina. The principal strength limiting material flaws were either defects traceable to chemical contamination or large grains grown by exaggerated growth. The discussion also dealt with the implications of these findings on the various brittle fracture theories. The fabrication of complex alumina shapes by the press forging process was studied with a goal of achieving not only the prescribed shape, but the unique optical and mechanical properties of press forged alumina. The consolidation of high purity fine particulate organo-metallic derived Al203 was studied.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1972
Accession Number
AD0740828

Entities

People

  • Philip L. Berneburg
  • Rowland M. Cannon
  • William H. Rhodes

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Ceramic Materials
  • Crystal Structure
  • Diffraction
  • Electron Microscopy
  • Fabrication
  • Geometry
  • Grain Growth
  • Grain Size
  • Hot Pressing
  • Manufacturing
  • Materials
  • Materials Laboratories
  • Mechanical Properties
  • Mechanical Working
  • Particle Size
  • X Rays

Fields of Study

  • Materials science

Readers

  • Educational Psychology
  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.