Thermodynamics of calcium and oxygen in molten titanium and titanium-aluminum alloy

The deoxidation equilibrium of molten titanium and titanium-aluminum alloys saturated with solid CaO has been measured in the temperature range from 1823-2023K. The equilibrium constant of reaction CaO (s)=Ca (mmass% in Ti,Ti-Al)+O (mass% in Ti,Ti-Al) and the interaction parameter between calcium an...

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Veröffentlicht in:	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science 1996-12, Vol.27 (6), p.967-972
Hauptverfasser:	TSUKIHASHI, F, TAWARA, E, HATTA, T
Format:	Artikel
Sprache:	eng
Schlagworte:	AEROSPACE INDUSTRY ALUMINIUM ALLOYS Applied sciences CALCIUM Condensed matter: structure, mechanical and thermal properties Exact sciences and technology EXPERIMENTAL DATA Heat capacities of solids LIQUID METALS MATERIALS SCIENCE Metals. Metallurgy OXYGEN Physics REDUCTION REFINING Thermal properties of condensed matter Thermal properties of crystalline solids Thermodynamic properties THERMODYNAMICS TITANIUM TITANIUM ALLOYS
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Zusammenfassung:	The deoxidation equilibrium of molten titanium and titanium-aluminum alloys saturated with solid CaO has been measured in the temperature range from 1823-2023K. The equilibrium constant of reaction CaO (s)=Ca (mmass% in Ti,Ti-Al)+O (mass% in Ti,Ti-Al) and the interaction parameter between calcium and oyxgen were determined for Ti, TiAl, and TiAl sub 3 . The standard Gibbs energy of reaction for TiAl was obtained as follows: Delta G deg =279 000-103T J/mol. The possibilities for the deoxidation of Ti and Ti-Al alloys by using calcium-based fluxes are discussed.
ISSN:	1073-5615 1543-1916
DOI:	10.1007/s11663-996-0010-2