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Thermodynamic properties of the Al-Ni system.

Authors
Schaefer SC
Source
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 7993, 1975 Jan; :1-15
Link
NIOSHTIC No.
10007576
Abstract
The Bureau of Mines studied thermodynamic properties of al-ni alloys containing 0.54 to 30.04 atomic percent nickel with the aid of the high-temperature galvanic cell Al(1) // Al+3 (AlCl3 in NaCl.KCl) // Al-Ni alloy (l or s). Activities of aluminum and nickel (compared with pure liquid metals as the standard state) show pronounced negative deviation from Raoult's law at 1,273 K. The properties deltaG, deltaGXS, deltaGideal, deltaGAl, deltaGXSAl, deltaGN1, and deltaGXSN1, have been derived from the experimental data and are summarized in tables and illustrations. At 1,127 K, the thermodynamic stability for the invariant three-phase equilibrium consisting of a saturated liquid, Al3Ni, and Al3Ni2 has been uniquely defined by an activity for aluminum of 0.751. A free energy of formation at 1,127 K of 7,940 cal/g-atom was derived for the compound Al3Ni.
Keywords
Aluminum alloys; Nickel alloys; Thermodynamic properties; Intermetallics; Heat of formation; Free energy; Phase transformations; Chemical reactivity; Aluminum intermetallics; Nickel intermetallics
Publication Date
19750101
Document Type
IH; Report of Investigations
Fiscal Year
1975
NTIS Accession No.
PB-240092
NTIS Price
A03
Identifying No.
RI-7993
NIOSH Division
ALRC
Source Name
Albany, OR: U.S. Department of the Interior, Bureau of Mines, RI 7993
State
OR
Page last reviewed: June 28, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division