OXIDATION BEHAVIOR OF BINARY NIOBIUM ALLOYS

Technical Report · Mon Oct 31 23:00:00 EST 1960

OSTI ID:4107649

Barrett, C A; Corey, J L

A screening study on the oxidation resistance of 33 binary alloy systems of niobium is reported. Alloys containing up to 25 nominal at. % of the alloying element were prepared by powder-metallurgy techniques and oxidized in air for 4 hr at lOOO deg C and 2 hr at 1200 deg C. The alloy sys tems showing the best oxidation resistance were Nb-- Cr, Nb--Ti, Nb--Al, Nb--V, and, to a lesser extent, Nb-- Fe, Nb-- Co, Nb-- Cu, and Nb--Ir. The chief factor contributing to this protection appears to be the ion size of the alloy addition. It should be slightly smaller than that of the Nb/sup 5+/ ion in order to dissolve in the Nb/ sub 2/O/sub 5/ oxide and lower the compressive stresses that crack the scale. (auth)

• Research Organization: National Aeronautics and Space Administration. Lewis Research Center, Cleveland
• NSA Number: NSA-15-006380
• OSTI ID: 4107649
• Report Number(s): NASA-TN-D-283
• Country of Publication: United States
• Language: English

Related Subjects

AIR
ALUMINUM ALLOYS
CHROMIUM ALLOYS
COBALT ALLOYS
COPPER ALLOYS
CRACKS
HIGH TEMPERATURE
IRIDIUM ALLOYS
IRON ALLOYS
METALS, CERAMICS, AND OTHER MATERIALS
NIOBIUM ALLOYS
NIOBIUM OXIDES
OXIDATION
POWDER METALLURGY
PREPARATION
PRESSURE
STABILITY
STRESSES
TITANIUM ALLOYS
VANADIUM ALLOYS