High Temperature Thermodynamic Properties of Copper-Nickel Alloys

Larrain, Jose M.

doi:10.1179/cmq.1979.18.4.401

Cited by 14 publications

(3 citation statements)

References 3 publications

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“…As Fig. 7 shows, the a,-values assumed by Larrain [18] also fit well with the data of this study. The thermodynamic activities uj determined by Nanis [35] show large positive deviations from ideality.…”

Section: Resultssupporting

confidence: 84%

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Thermodynamics of Solid Cu—Ni Alloys by Knudsen Cell Mass Spectrometry and Re‐Calculation of the Phase Diagram

Tomiska

Neckel

1984

Ber Bunsenges Phys Chem

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Copper-Nickel (solid) / Mass Spectrometry / Phase Diagram / ThermodynamicsSolid Cu -Ni alloys have been investigated thermodynamically within the whole range of composition by Knudsen Cell Mass Spectrometry. The "Algebraic Intensity-Ratio"-method (A. I. R.) has been used for the determination of the thermodynamic mixing behavior. The thermodynamic activities uj show positive deviations from Raoult's law. The molar enthalpies of mixing HE and the molar excess Gibbs energies GE are positive over the whole range of composition. At 1350 K the maximum value of H E is 2420 J/mol (59.48 at-% Ni), and the maximum value of GE is 3220 J/mol(53 at-% Ni). The excess entropies SE are negative over the whole range of composition with a minimum value of -0.719 J/mol. K at 36.71 at-% Ni. The phase diagram has been re-evaluated by using an analytical procedure which is based on the generalized Newton method for the numerical solution of equations. The calculations are based on the thermodynamic data obtained in this study, on the thermodynamic results from mass spectrometric studies on liquid Cu-Ni alloys, and on literature data for the heat capacities and the heats of melting of Cu and Ni.

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Section: Resultssupporting

confidence: 84%

“…Calculations of the phase boundaries of the Cu -Ni equilibrium phase diagram have been already performed by several authors [14,18,30,31]. The results of these authors are given in Fig.…”

Section: The Cu -Ni Equilibrium Phase Diagrammentioning

confidence: 99%

Thermodynamics of Solid Cu—Ni Alloys by Knudsen Cell Mass Spectrometry and Re‐Calculation of the Phase Diagram

Tomiska

Neckel

1984

Ber Bunsenges Phys Chem

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“…The miscibility gap in the Cu-Ni alloy system was predicted to appear at temperatures lower than 600 K based on thermodymamical data [1]. Several works have been carried out in order to confirm experimentally the spinodal decomposition in these alloys by different experimental techniques [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Microstructural Evolution in Isothermally-Aged Cu-Ni Based Alloys

Ávila-Dávila

Melo-Máximo

Gutierrez-Mendez

et al. 2006

AMR

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The microstructure simulation of spinodal decomposition was carried out in the isothermally-aged Cu-Ni and Cu-Ni-Fe and Cu-Ni-Cr alloys using the phase field method. The numerical simulation was based on a solution of the Cahn-Hilliard partial differential equation by the finite difference method. The calculated results were compared to those determined by atom-probe field ion microscope analyses of the solution treated and aged alloys. Both the numerically simulated and experimental results showed a good agreement for the concentration profiles and microstructure in the aged Cu-Ni, Cu-Ni-Fe and Cu-Ni-Cr alloys. A very slow growth kinetics of phase decomposition was observed to occur in the aged Cu-Ni alloys. The morphology of decomposed phases consists of an irregular shape with no preferential alignment in any crystallographic direction at the early stages of aging in all the aged alloys. In the case of the aged Cu-Ni-Fe alloy, a further aging caused the change of initial morphology to an equiaxial shape of the decomposed Ni-rich phase aligned in the elastically-softest crystallographic direction <100> of Cu-rich matrix. The growth kinetics rates of phase decomposition in Cu-Ni-Fe and Cu-Ni-Cr alloys are appreciably faster than that in Cu-Ni alloys.

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Cu-Ni (Copper-Nickel)

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Cr-Cs – Cu-Zr

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High Temperature Thermodynamic Properties of Copper-Nickel Alloys

Cited by 14 publications

References 3 publications

Thermodynamics of Solid Cu—Ni Alloys by Knudsen Cell Mass Spectrometry and Re‐Calculation of the Phase Diagram

Thermodynamics of Solid Cu—Ni Alloys by Knudsen Cell Mass Spectrometry and Re‐Calculation of the Phase Diagram

Numerical Simulation of Microstructural Evolution in Isothermally-Aged Cu-Ni Based Alloys

Cu-Ni (Copper-Nickel)

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