Observations of the Oxidation of Pure and Sputtered Tantalum Via Dilatometry.

Abstract

The oxidation of pure and sputtered tantalum foils was observed via dilatometry and weight gain measurements. Specimens were tested in both helium and laboratory air at isothermal temperatures ranging from 300 deg C to 850 deg C. Based on weight gain measurements of pure tantalum, it is apparent that oxygen saturation occurred. The activation energy for both the pure and sputtered tantalum was consistent with the activation energy for absorption rather than interstitial or grain boundary diffusion. This investigation is the precursor to subsequent dilatometry investigations on the effects on hydrogen in tantalum at elevated temperatures.

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Document Details

Document Type
Technical Report
Publication Date
Apr 08, 1999
Accession Number
ADA371038

Entities

People

  • A. M. Welty
  • G. N. Vigilante
  • Paul J. Cote

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Acquisition
  • Body Weight
  • Boundaries
  • Data Acquisition
  • Diffusion
  • Energy
  • Grain Boundaries
  • Heat Of Activation
  • Hydrogen
  • Measurement
  • Observation
  • Oxidation
  • Oxygenation
  • Refractory Metals
  • Tantalum
  • Tensile Strength

Readers

  • Materials Science and Engineering.
  • Thin Film Deposition Science.