HIGH-TEMPERATURE OXIDATION OF SOME ALLOYS OF TITANIUM AND TANTALUM WITH ZIRCONIUM

Journal Article · Sat Jul 01 04:00:00 EDT 1961 · Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, Met. i Toplivo

OSTI ID:4816958

Voitovich, R F; Makarova, R V

The little-known corrosion-resisting properties of Ti-- Zr and Ta- Zr alloys were investigated by following the oxidation of the alloys using a continuous weighing method. The Ti-- Zr system consists of a continuous series of solid solutions while Ta forms eutectic type limited-solubility alloys with Zr. Ti alloys containing 30, 70, and 90% Zr and Ta alloys with 10, 30, and 70% Zr were used for the tests. Thermodynamic calculations indicate that between 500 and 900 deg C the higher Ti oxides are reduced to lower oxides by Zr, yielding primarily TiO. ln the Ta-- Zr system the alloys containing small amounts of Zr are only slightly oxidized in view of the formation of a protective oxide film. At higher Zr concentrations the alloys are more heavily attacked, probably because of stresses formed in the protective layer. As a general rule it is concluded that alloying of Ti and Ta with Zr leads to a marked decrease of the high-temperature oxidation resistance of these alloys, especially at temperatures beyond 600 deg C. (TTT)

• Research Organization: Inst. of Metal-Ceramics and of Special Alloys, Ukrainian Academy of Sciences
• NSA Number: NSA-16-003411
• OSTI ID: 4816958
• Journal Information: Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, Met. i Toplivo, Journal Name: Izvest. Akad. Nauk S.S.S.R., Otdel. Tekh. Nauk, Met. i Toplivo Vol. Vol: No. 4
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

CORROSION
EUTECTICS
FILMS
HIGH TEMPERATURE
MATERIALS TESTING
METALS, CERAMICS, AND OTHER MATERIALS
OXIDATION
OXIDES
REDUCTION
SOLIDS
SOLUTIONS
STRESSES
TANTALUM ALLOYS
THERMODYNAMICS
TITANIUM ALLOYS
TITANIUM OXIDES
WEIGHT
ZIRCONIUM ALLOYS