Consolidation of Al2O3 Nano-Ceramic Powders for High Power Micro-Wave Window

Abstract

In this study nanostructured a-Al2O3 ceramics have been fabricated by the combined application of magnetic pulsed compaction (MPC) and spark plasma sintering (SPS), and their density and hardness properties were investigated. The combined application of the MPC and the SPS produced very fine and dense alumina ceramics. The measured grain size was 330nm being slightly higher than the size of the starting powder (200-300nm), suggesting a very low degree of grain growth during the MPC and SPS processes and 99.7%, and the relative density was 99.7% being very close to the theoretical density (3.99g/cm3).

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 19, 2007
Accession Number
ADA474849

Entities

People

  • Whung W. Kim

Organizations

  • Korea Atomic Energy Research Institute

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Electron Microscopes
  • Electron Microscopy
  • Fabrication
  • Grain Growth
  • Grain Size
  • Hardness
  • Hot Pressing
  • Materials
  • Materials Processing
  • Mechanical Working
  • Nanoparticles
  • Particles
  • Powder Metallurgy
  • Powders
  • Scanning Electron Microscopes
  • Sintering

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Microelectronics