Precipitation and Ordering in the Niobium-Hydrogen System.

Abstract

An experimental study, using transmission electron microscopy techniques was carried out to observe precipitation and ordering phenomena in the niobium-hydrogen system. Niobium-hydrogen alloys of composition H/Nb = 0.001 to H/Nb = 1.07 were prepared by improved hydrogen charging methods. Room temperature, hot stage, and cold stage experiments were performed in situ in the electron microscope. The plastic deformation, which accompanies the precipitation and dissolution of hydrides, was observed. Volume constraint, temperature gradients, and impurity traps were shown to have an effect on the nucleation of hydrides.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1978
Accession Number
ADA060004

Entities

People

  • Bruce James Makenas

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Cubic Lattices
  • Diffraction
  • Electron Diffraction
  • Electron Microscopes
  • Electron Microscopy
  • Mass Spectrometry
  • Materials
  • Measurement
  • Phase Diagrams
  • Phase Transformations
  • Scattering
  • Solid Solutions
  • Transmission Electron Microscopy

Readers

  • Materials Science (Mechanical Engineering).
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics