Thermodynamic activities and phase boundaries for the alloys of the Ni{sub 3}Al-Ni{sub 3}Ti pseudobinary section in the Ni-Al-Ti system

Journal Article · Sun Sep 01 00:00:00 EDT 1996 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/BF02652360· OSTI ID:382518

Kapala, J ^[1]; Kath, D; Hilpert, K ^[2]

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1. Technical Univ. of Wroclaw (Poland)
2. Research Center, Juelich (Germany). Inst. of Materials in Energy Systems

The pseudobinary section Ni{sub 3}Al-Ni{sub 3}Ti of the ternary Ni-Al-Ti system has been investigated by thermal analysis and Knudsen effusion mass spectrometry. The solidus of the pseudobinary section and the thermodynamic activities of Ni and Al have been determined in the alloys Ni{sub 0.75}Al{sub 0.25{minus}x}Ti{sub x} of the compositions x = 0.00 to 0.21. Moreover, the thermodynamic activities of Ni and Ti in Ni{sub 3}Ti (x = 0.25) as well as the Gibbs energy of mixing of the Ni{sub 0.75}Ti{sub 0.25}phase resulted. The ionization cross-sectional ratio {sigma}(Ni)/{sigma}(Ti) = 0.77 has been evaluated for the electron impact energy of 50 eV.

• Sponsoring Organization: USDOE
• OSTI ID: 382518
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 27, Issue 9; Other Information: PBD: Sep 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL ALLOYS
PHASE STUDIES
THERMODYNAMIC ACTIVITY
ALUMINIUM ALLOYS
TITANIUM ALLOYS
INTERMETALLIC COMPOUNDS
THERMAL ANALYSIS
KNUDSEN FLOW
MASS SPECTROSCOPY
CHEMICAL COMPOSITION
MIXING HEAT
LIQUID METALS
PARTIAL PRESSURE