A thermodynamic analysis of the binary alloy systems Cu-Cr, Cu-Nb and Cu-V

Hämäläinen, Marko; Jääskeläinen, K.; Luoma, Rauno; Nuotio, M.; Taskinen, Pekka; Teppo, O.

doi:10.1016/0364-5916(90)90014-q

Cited by 87 publications

(31 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The second group relates to work within which calculations showed uninterrupted character of the (Cr)-phase liquidus line. In the majority of these works the calculations were made on the basis of data on the thermodynamic properties of phases [14,16] or within the framework of thermodynamic evaluations of the system [29][30][31]. An exception is work [9] where a similar result was obtained by analyzing phase equilibrium data.…”

Section: Thermodynamic Properties Of Phasesmentioning

confidence: 99%

“…In [14] and [16] parts of the phase diagram were calculated on the basis of data on the thermodynamic properties of the liquid phase obtained in [10] and [16], respectively. A thermodynamic evaluation of the system was performed in [29][30][31] on the basis of analysis of information about the thermodynamic properties of phases and their transformation parameters. Coefficients of models describing the thermodynamic properties of phases of the system, obtained in much earlier works [9,14,[28][29][30] were compiled in [31].…”

Section: Thermodynamic Properties Of Phasesmentioning

confidence: 99%

“…Attempts to calculate work out the phase diagram of the system or their individual parts were made in [9,[14][15][16][28][29][30][31]. In [9,15,28] thermodynamic parameters, characterizing the interaction of the components of phases were calculated from phase equilibria.…”

Section: Thermodynamic Properties Of Phasesmentioning

confidence: 99%

See 2 more Smart Citations

Phase equilibria and thermodynamics of binary copper systems with 3d-metals. III. Copper-chromium system

Турчанин

2006

Powder Metall Met Ceram

View full text Add to dashboard Cite

Experimental information on phase equilibria and thermodynamic properties of the Cu − Cr system are described within the framework of the CALPHAD-method in order to obtain self-consistent analytical description of the system. The resulting set of coefficients makes it possible to calculate the thermodynamic properties of phases and related equilibrium transformations. A model of Gibbs excess free energy of the liquid phase takes into account excess heat capacity. Possible metastable transformations in the system, such as the immiscibility of supercooled liquid alloys and formation of supersaturated terminal solid solutions, are discussed.Keywords: phase equilibrium diagram, thermodynamics, thermodynamic modelling, metastable transformations, copper alloys, supersaturated solid solutions, immiscibility of supercooled melts.Alloys of copper and chromium have found extensive application in modern industry as heat-resistant materials that exhibit high electrical and thermal conductivity. This has governed their use for the preparation of currentconducting parts of mechanisms operating under significant mechanical and thermal loads (crystallizers of furnaces, first of all), special electrodes, and also in order to prepare electrical contact materials. An even more promising use of two-component alloys of copper and chromium opens up in view of the possibility to increase their mutual solubility with help of modern, highly nonequilibrium methods of metallurgical synthesis, such as melt quenching, mechanical alloying, and deposition from the gas phase.A solution of important technological problems, such as preparation of materials with an extended concentration range of solid solutions, development of their heat treatment conditions in order to provide the required complex of operating properties, demands an exact idea about the nature of equilibrium and nonequilibrium transformations in the system. The least studied among them remained the high-temperature part of the phase diagram and closely connected with it question of the possibility of liquid phase separation. When modern experimental methods cannot give a clear answer at this question, an attempt to solve it in the context of constructing a thermodynamic model of the system is of an undoubted interest. PHASE EQUILIBRIAStable phase transformations. Phase equilibria in the system have been studied in a number of works [1][2][3][4][5][6][7][8][9][10][11][12][13]. It has been established that the copper − chromium system is of the eutectic type. There are two regions of primary solidification with insignificant concentration ranges of its existence on the phase diagram (Fig. 1): a FCC-solution based on copper, i.e. (Cu)-phase, and a BCC-solution based on chromium, i.e. (Cr)-phase. The peculiarity of the phase diagram is an almost horizontal part of the (Cr)-phase liquidus line. Most often questions discussed concerning the nature of phase equilibria in the system are the probability of the occurrence of separation in the liquid phase, the stable or metastable nature...

show abstract

Section: Thermodynamic Properties Of Phasesmentioning

confidence: 99%

Section: Thermodynamic Properties Of Phasesmentioning

confidence: 99%

See 1 more Smart Citation

Phase equilibria and thermodynamics of binary copper systems with 3d-metals. III. Copper-chromium system

Турчанин

2006

Powder Metall Met Ceram

View full text Add to dashboard Cite

show abstract

“…What has been stated earlier indicates the thermodynamic-kinetic approach can be utilized to find answers to the above three questions. With the aim to calculate the thermodynamic parameters to understand the diffusion process, the ternary phase diagram of the Cu-Nb-Sn system is calculated with the help of the assessed data from the references (Hämäläinen et al, 1990;Toffolon et al, 2002;Shim et al,1996). In these calculations, all intermetallic compounds are modeled as binary compounds, since dissolution of ternary elements are found to be negligible based on the available information.…”

Section: Thermodynamic-kinetic Analysis Of the Growth Of Nb 3 Snmentioning

confidence: 99%

Microstructure, Diffusion and Growth Mechanism of Nb3Sn Superconductor by Bronze Technique

Paul¹,

Laurila²,

Vuorinen³

2010

Superconductor

View full text Add to dashboard Cite

“…42) The parameters for the liquid phase were used in the model for the liquid/amorphous phase across the whole temperature range.…”

Section: Interactions Involving Nb and Cumentioning

confidence: 99%

Thermodynamic Study of Magnetic Field-Enhanced Nanocrystallisation in Amorphous Fe-Si-B(-Nb-Cu)

et al. 2007

View full text Add to dashboard Cite

Recent work has shown that annealing amorphous alloys under an applied magnetic field can enhance the fraction of nanocrystalline phase formed and induce a strong texture. This effect has been attributed to the displacement of thermodynamic equilibrium by the energetic contribution from the applied field. In the present paper, an attempt is made to test the validity of this proposition in the Fe-Si-B(-Nb-Cu) system using equilibrium calculations in the framework of the CALPHAD (CALculation of PHAse Diagrams) methodology and a simple estimate of the energy supplied by the field. However, it is found that the magnetic energy term thus obtained is too small to produce the observed change in nanocrystalline phase fraction. Possible reasons for this discrepancy are discussed.

show abstract

A thermodynamic analysis of the binary alloy systems Cu-Cr, Cu-Nb and Cu-V

Cited by 87 publications

References 23 publications

Phase equilibria and thermodynamics of binary copper systems with 3d-metals. III. Copper-chromium system

Phase equilibria and thermodynamics of binary copper systems with 3d-metals. III. Copper-chromium system

Microstructure, Diffusion and Growth Mechanism of Nb3Sn Superconductor by Bronze Technique

Thermodynamic Study of Magnetic Field-Enhanced Nanocrystallisation in Amorphous Fe-Si-B(-Nb-Cu)

Contact Info

Product

Resources

About