A BASIC STUDY OF VACUUM-FUSION ANALYSIS OF REFRACTORY METALS FOR GASES. Final Report
Technical Report
·
OSTI ID:4770271
Various techniques for the determination of oxygen in the refractory metals Nb, Ta, Mo, and W by the vacuumfusion method are evaluated. The platinum bath at 1900 deg C and a Pt: M ratio as low as 1: 1 is satisfactory for niobium and tantalum. An iron bath at 1650 deg C and a maximum molybdenum or tungsten content of 30% is recommended for molybdenum and tungsten. Hydrogen absorption by a Hopcalite-Ascarite mixture 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. Several phase diagrams pertinent to the vacuum-fusion analysis of the 4 metals are given. (auth)
- Research Organization:
- Battelle Memorial Inst., Columbus, Ohio
- NSA Number:
- NSA-16-030332
- OSTI ID:
- 4770271
- Report Number(s):
- WAL-TR-823/5
- Country of Publication:
- United States
- Language:
- English
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