Synthesis, Characterization, and Properties of Nanometer-Sized Intermetallics.

Abstract

Nanocrystalline intermetallics were produced from pre-cast NiAl using electron beam inert gas condensation system. A liquid nitrogen cooled cold finger was used to collect the powder. After collection, the powder was transported under high vacuum to a compaction unit where in-situ compaction at 1.4 Gpa was carried out under vacuum conditions at temperatures ranging from 100 to 300C. Energy dispersive spectroscopy and X-ray diffraction (XRD) techniques were used to investigate chemical composition, phase and grain size. Average grain size in the range of 2 to 10 nm was found for various specimens. XRD spectra of as consolidated specimens suggested a majority of ordered phase with little disordering in n-NiAl.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1995
Accession Number
ADA320458

Entities

People

  • Mahmood S. Choudry
  • Marek Dollar

Organizations

  • Illinois Institute of Technology

Tags

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Composition
  • Chemical Synthesis
  • Chemistry
  • Crystal Lattices
  • Diffraction
  • Electron Beams
  • Electron Microscopes
  • Grain Size
  • Materials
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Microscopy
  • Particle Size
  • X Rays
  • X-Ray Diffraction

Readers

  • Powder metallurgy of Titanium alloys.
  • Thermal Physics or Thermal Science.

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  • Directed Energy
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