ABSTRACT

Partial and integral enthalpies of mixing of liquid Bi-Ni alloys were determined at 1273 K, while enthalpies of mixing of ternary Ag Bi Ni alloys were determined at 1173 K over a broad composition range along six sections: x(Ag)/x(Bi) =3/2, 1, 2/3, 3/7, 1/4; x(Bi)/x(Ni) =4. Measurements were carried out using Calvet type microcalorimeters and drop calorimetric technique. It was found that integral enthalpies of mixing of binary Bi-Ni alloys are small exothermic, whereas integral mixing enthalpies of ternary Ag-Bi-Ni alloys change sign from negative to positive with decreasing Bi content. The ternary data were fitted on the basis of an extended Redlich Kister Muggianu model for substitutional solutions, and additional ternary interaction parameters were determined. From experimental ternary data the range of liquid at 1173 K was deduced.

Compounds

#	Formula	Name
1	Bi	bismuth
2	Ag	silver
3	Ni	nickel

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	3 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	8
POMD	3 2 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	46
POMD	3 2 1	Excess molar enthalpy (molar enthalpy of mixing), kJ/mol ; Liquid	Mole fraction - 1; Liquid Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Calvet calorimetry	13

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Mixing enthalpies of liquid Bi-Ni and Ag-Bi-Ni alloys

Fima, Przemyslaw, Flandorfer, Hans

ABSTRACT