A BASIC STUDY OF VACUUM-FUSION ANALYSIS OF REFRACTORY METALS FOR GASES

Abstract

Various techniques for determination of oxygen in the refractory metals columbium, tantalum, molybdenum, and tungsten by the vacuum fusion method were evaluated. The platinum bath at 1900 C and a Pt:M ratio as low as 1:1 is satisfactory for columbium and tantalum. An iron bath at 1650 C and a maximum molybdenum or tungsten content of 30 per cent is recommended for molybdenum and tungsten. Hydrogen absorption by a Hopcalite-Ascarite mixturc was shown. This leads to some error in oxygen analyses made with this absorbent. The use of a gas chromatograph and internal gas standard for analysis of vacuum fusion gases was demonstrated.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1962
Accession Number
AD0283548

Entities

People

  • D. F. Kohler
  • M. W. Mallett

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Carbon Monoxide
  • Chemistry
  • Chromatographs
  • Composite Materials
  • Detectors
  • Dielectric Gases
  • Jet Propulsion
  • Laboratory Equipment
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Measurement
  • Military Research
  • Phase Diagrams
  • Refractory Metals
  • Standards

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Surface Engineering/Surface Coating Technology.