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

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/s11663-996-0010-2· OSTI ID:445313

Tsukihashi, Fumitaka; Tawara, Eiji; Hatta, Toshiyuki ^[1]

---

1. Univ. of Tokyo (Japan). Dept. of Metallurgy

The deoxidation equilibrium of molten titanium and titanium-aluminum alloys saturated with solid CaO has been measured in the temperature range from 1,823 to 2,023 K. The equilibrium constant of reaction CaO (s) = Ca (mass pct in Ti, Ti-Al) + O (mass pct in Ti, Ti-Al) and the interaction parameter between calcium and oxygen were determined for Ti, TiAl, and TiAl{sub 3}. The standard Gibbs energy of reaction for TiAl was obtained as follows: {Delta}G{degree} = 279,000 {minus} 103T J/mol. The possibilities for the deoxidation of titanium and titanium-aluminum alloys by using calcium-based fluxes are discussed.

• Sponsoring Organization: USDOE
• OSTI ID: 445313
• Journal Information: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science Journal Issue: 6 Vol. 27; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
ALUMINIUM ALLOYS
CALCIUM
EXPERIMENTAL DATA
LIQUID METALS
OXYGEN
REDUCTION
REFINING
THERMODYNAMICS
TITANIUM
TITANIUM ALLOYS