COLUMBIUM-OXYGEN SYSTEM
Journal Article
·
· Trans. Am. Soc. Metals
OSTI ID:4168131
The niobium-oxygen equilibrium system was determined by metallographic examination of arc-cast alloys made of electron-gun-refined niobium metal and special purity niobium pentoxide. Two intermediate oxides, NbO and NbO/sub 2/, melt without decomposition at 1945 and 1915 deg C (3533 and 3479 deg F), respectively. Eutectic reactions exist between niobium and NbO at 1915 deg C (3479 deg F) and between NbO and NbO/sub 2/ at 1810 deg C (3290 deg F). Experimental evidence supponts a peritectric reaction between NbO/sub 2/ and Nb/ sub 2/O/sub 5/ at 1510 deg C (2750 deg F). The maximum solid solubility of oxygen in niobium metal is 0.72 weight%. (ASM-SLA Classification: M24b; Nb,O). (auth)
- Research Organization:
- Armour Research Foundation, Illinois Inst. of Tech., Chicago
- NSA Number:
- NSA-14-022079
- OSTI ID:
- 4168131
- Journal Information:
- Trans. Am. Soc. Metals, Journal Name: Trans. Am. Soc. Metals Vol. Vol: 52
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
CASTING
DECOMPOSITION
ELECTRIC ARCS
ELECTRON BEAMS
ELECTRONS
EUTECTICS
HIGH TEMPERATURE
IMPURITIES
MELTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM
NIOBIUM OXIDES
OXYGEN
PARTICLE SOURCES
PHASE DIAGRAMS
QUANTITATIVE ANALYSIS
REACTION KINETICS
REFINING
SOLID SOLUTIONS
TESTING
WEIGHT
DECOMPOSITION
ELECTRIC ARCS
ELECTRON BEAMS
ELECTRONS
EUTECTICS
HIGH TEMPERATURE
IMPURITIES
MELTING
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM
NIOBIUM OXIDES
OXYGEN
PARTICLE SOURCES
PHASE DIAGRAMS
QUANTITATIVE ANALYSIS
REACTION KINETICS
REFINING
SOLID SOLUTIONS
TESTING
WEIGHT