Co–Cu system
75 accepted literature values from 2 paper(s) (experimental 63, model 12); 4 calculated phase diagram(s). 1 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.
Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (4) · papers (bibliography) · Markdown
| Evidence class | Values |
|---|---|
| experimental | 63 |
| model | 12 |
| Property group | Values |
|---|---|
| invariant reaction | 12 |
| phase equilibrium | 10 |
| mixing / partial | 29 |
| heat capacity / entropy / enthalpy | 1 |
| activity / EMF / Gibbs energy | 23 |
Calculated phase diagrams
Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.
| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| CoCu-00Kub-LB.tdb | J. Kubista, J. Vrestal, J. Phase Equilib., 21, 125-29(2000). doi:10.1361/105497100770340165 | e190588a17897dcba6dee61dc2e7c674ce36a207c0491726a8d9c2ca5913041f | viewer · TDB · JSON |
| CoCu-06Pal.tdb | M. Palumbo, S. Curiotto, L. Battezzati, Calphad, 30, 171-78(2006). doi:10.1016/j.calphad.2005.10.007 | e6f9f7cd2524034b8162b1891c3380d13aeb1840c86a06d8af76ef1067602cdb | viewer · TDB · JSON |
| CoCu-80Has.tdb | M. Haseba, T. Nishizawa, Calphad, 4, 83-100(1980). doi:10.1016/0364-5916(80)90026-7 | aab8a56c0d106053f31f3346e4d994f30859ea4ec8d0585fc2ed300addb40897 | viewer · TDB · JSON |
| CoCu-97Oht.tdb | H. Ohtani, H. Suda, K. Ishida, ISIJ Int., 37, 207-16(1997). doi:10.2355/isijinternational.37.207 | dadbec645d9a2e07431ab1aa232a27aa4c28926f0a630e2a5ca264ea88d1ccc8 | viewer · TDB · JSON |
| TDB file | T (K) | Phases at the invariant |
|---|---|---|
| CoCu-00Kub-LB.tdb | 1380.75 | FCC_A1#2 (x(Cu) 0.09852) + FCC_A1 (x(Cu) 0.91183) + LIQUID (x(Cu) 0.92261) |
| CoCu-00Kub-LB.tdb | 709.66 | FCC_A1 (x(Cu) 0.00244) + HCP_A3 (x(Cu) 0.00404) + FCC_A1#2 (x(Cu) 0.99747) |
| CoCu-06Pal.tdb | 1378.27 | FCC_A1#2 (x(Cu) 0.12484) + FCC_A1 (x(Cu) 0.90809) + LIQUID (x(Cu) 0.94667) |
| CoCu-06Pal.tdb | 685.61 | HCP_A3 (x(Cu) 0.00136) + FCC_A1#2 (x(Cu) 0.00239) + FCC_A1 (x(Cu) 0.99954) |
| CoCu-80Has.tdb | 1383.32 | FCC_A1 (x(Cu) 0.10876) + FCC_A1#2 (x(Cu) 0.91943) + LIQUID (x(Cu) 0.94877) |
| CoCu-80Has.tdb | 692.73 | HCP_A3 (x(Cu) 2.100e-4) + FCC_A1#2 (x(Cu) 4.500e-4) + FCC_A1 (x(Cu) 0.99971) |
| CoCu-97Oht.tdb | 1383.35 | FCC_A1 (x(Cu) 0.10917) + FCC_A1#2 (x(Cu) 0.91939) + LIQUID (x(Cu) 0.94878) |
| CoCu-97Oht.tdb | 692.65 | HCP_A3 (x(Cu) 2.100e-4) + FCC_A1#2 (x(Cu) 4.600e-4) + FCC_A1 (x(Cu) 0.99971) |
Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CoCu-00Kub-LB · CALPHAD hull CoCu-80Has · CALPHAD hull CoCu-97Oht
Invariant reactions (literature)
| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|
| 1386 | L + (αCo) <=> (αCu) | L: Co 0.057; (αCo): Co 0.883 | model | [1] Turchanin 2007 | Table 1, p. 6, row 12 report | |
| 1385 | L + (αCo) <=> (αCu) | L: Co 0.051; (αCo): Co 0.874 | model | [1] Turchanin 2007 cites ref. 13 | Table 1, p. 6, row 10 report | |
| 1385 | L + (αCo) <=> (αCu) | L: Co 0.048; (αCo): Co 0.88 | experimental | [1] Turchanin 2007 cites ref. 27 | Table 1, p. 6, row 3 report | |
| 1385 | L + (αCo) <=> (αCu) | experimental | [1] Turchanin 2007 cites ref. 28 | Table 1, p. 6, row 4 report | ||
| 1381 | L + (αCo) <=> (αCu) | L: Co 0.077; (αCo): Co 0.902 | model | [1] Turchanin 2007 cites ref. 15 | Table 1, p. 6, row 11 report | |
| 1379 | L + (αCo) <=> (αCu) | L: Co 0.04; (αCo): Co 0.876 | model | [1] Turchanin 2007 cites ref. 6 | Table 1, p. 6, row 8 report | |
| 1370 | L + (αCo) <=> (αCu) | L: Co 0.073; (αCo): Co 0.876 | model | [1] Turchanin 2007 cites ref. 12 | Table 1, p. 6, row 9 report | |
| 717 | (αCo) <=> (Cu) + (εCo) | (αCo): Co 0.992; (Cu): Co 0.005; (εCo): Co 0.994 | model | [1] Turchanin 2007 cites ref. 12 | Table 1, p. 6, row 18 report | |
| 698 | (Cu) + (αCo) <=> (εCo) | (Cu): Co 4.000e-4; (αCo): Co 0.9981; (εCo): Co 0.9977 | model | [1] Turchanin 2007 | Table 1, p. 6, row 20 report | |
| 695 | (αCo) <=> (Cu) + (εCo) | (αCo): Co 0.999; (Cu): Co 4.000e-4; (εCo): Co 0.9996 | model | [1] Turchanin 2007 cites ref. 13 | Table 1, p. 6, row 19 report | |
| 693 | (αCo) <=> (Cu) + (εCo) | (αCo): Co 0.9992; (Cu): Co 8.000e-4; (εCo): Co 0.9995 | model | [1] Turchanin 2007 cites ref. 6 | Table 1, p. 6, row 17 report | |
| 615 | (αCo) <=> (Cu) + (εCo) | (αCo): Co 0.905 | experimental | [1] Turchanin 2007 cites ref. 27 | Table 1, p. 6, row 13 report |
Other properties
Phase equilibrium (10)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Phase composition | Co-rich phase Co-rich phase: Co 0.9492, Cu 0.0508 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 10 report | |||
| Phase composition | Co-rich phase Co-rich phase: Co 0.9848, Cu 0.0152 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 9 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9274, Cu 0.0726; Cu-rich phase: Co 0.1065, Cu 0.8935 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 6 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.8992, Cu 0.1008; Cu-rich phase: Co 0.0715, Cu 0.9285 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 4 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9198, Cu 0.0802; Cu-rich phase: Co 0.04, Cu 0.96 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 1 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9088, Cu 0.0912; Cu-rich phase: Co 0.1131, Cu 0.8869 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 7 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9111, Cu 0.0889; Cu-rich phase: Co 0.0784, Cu 0.9216 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 5 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9004, Cu 0.0996; Cu-rich phase: Co 0.0751, Cu 0.9249 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 2 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9325, Cu 0.0675; Cu-rich phase: Co 0.1225, Cu 0.8775 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 8 report | |||
| Phase composition | Co-rich phase + Cu-rich phase Co-rich phase: Co 0.9131, Cu 0.0869; Cu-rich phase: Co 0.0715, Cu 0.9285 | experimental | [2] Kubišta 2000 | Table 1, p. 3, row 3 report |
Mixing / partial (29)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Enthalpy of mixing printed: ΔH^E | 5.575 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.8, Cu 0.2 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 3 report | |
| Enthalpy of mixing printed: ΔHE | 7.828 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.4, Cu 0.6 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 7 report | |
| Enthalpy of mixing printed: ΔHE | 6.733 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.3, Cu 0.7 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 8 report | |
| Enthalpy of mixing printed: ΔH^E | 3.186 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.9, Cu 0.1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 2 report | |
| Enthalpy of mixing printed: HE | 8.294 kJ/mol (basis unstated) | 1810.15 | liquid | model | [2] Kubišta 2000 | p. 3 report | Liquid Co-Cu alloys are characterized by positive values of the molar excess Gibbs energies GE at 1537 °C (Fig. 2, Table 4), positive values of the molar excess entropies SE (Table 4), and endothermic molar heat of mixing HE (Fig. 3, Table 4). At that temperature, the maximum HE value is 8294 J·mol-1 at 50at.%Cu, the maximum SE value is 1.00 J·mol-1·K-1 at 40at.%Cu, and the maximum GE value is 65… |
| Enthalpy of mixing printed: ΔHE | 2.785 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.1, Cu 0.9 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 10 report | |
| Enthalpy of mixing printed: ΔHE | 8.294 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.5, Cu 0.5 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 6 report | |
| Enthalpy of mixing printed: ΔHE | 7.201 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.7, Cu 0.3 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 4 report | |
| Enthalpy of mixing printed: ΔHE | 5.04 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.2, Cu 0.8 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 9 report | |
| Enthalpy of mixing printed: ΔH^E | 8.096 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.6, Cu 0.4 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 5 report | |
| Enthalpy of mixing printed: mixing enthalpy | 9.7 kJ/mol (basis unstated) | 1834 | experimental | [1] Turchanin 2007 cites ref. 17 | p. 2 report | The integral mixing enthalpies were determined in [17] for 10 alloys of xCo = 0.092-0.931 by mixing metals heated to an experimental temperature of 1834 K in an isothermal calorimeter. It is established that the mixing enthalpy of the system is endothermic and is maximum (9.7 kJ/mole) near the equiatomic composition (Fig. 2). | |
| Entropy of mixing printed: ΔS^E | 0.779 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.8, Cu 0.2 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 3 report | |
| Entropy of mixing printed: ΔSE | 0.847 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.4, Cu 0.6 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 7 report | |
| Entropy of mixing printed: ΔSE | 0.671 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.3, Cu 0.7 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 8 report | |
| Entropy of mixing printed: ΔS^E | 0.468 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.9, Cu 0.1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 2 report | |
| Entropy of mixing printed: ΔSE | 0.227 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.1, Cu 0.9 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 10 report | |
| Entropy of mixing printed: ΔSE | 0.966 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.5, Cu 0.5 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 6 report | |
| Entropy of mixing printed: ΔSE | 0.952 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.7, Cu 0.3 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 4 report | |
| Entropy of mixing printed: ΔSE | 0.457 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.2, Cu 0.8 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 9 report | |
| Entropy of mixing printed: ΔS^E | 1.008 J/mol (basis unstated)/K | 1810.15 | liquid alloy: Co 0.6, Cu 0.4 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 5 report | |
| Gibbs energy of mixing printed: ΔG^E | 4.165 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.8, Cu 0.2 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 3 report | |
| Gibbs energy of mixing printed: ΔGE | 6.295 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.4, Cu 0.6 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 7 report | |
| Gibbs energy of mixing printed: ΔGE | 5.519 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.3, Cu 0.7 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 8 report | |
| Gibbs energy of mixing printed: ΔG^E | 2.339 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.9, Cu 0.1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 2 report | |
| Gibbs energy of mixing printed: ΔGE | 2.374 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.1, Cu 0.9 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 10 report | |
| Gibbs energy of mixing printed: ΔGE | 6.545 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.5, Cu 0.5 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 6 report | |
| Gibbs energy of mixing printed: ΔGE | 5.477 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.7, Cu 0.3 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 4 report | |
| Gibbs energy of mixing printed: ΔGE | 4.213 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.2, Cu 0.8 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 9 report | |
| Gibbs energy of mixing printed: ΔG^E | 6.272 kJ/mol (basis unstated) | 1810.15 | liquid alloy: Co 0.6, Cu 0.4 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 5 report |
Heat capacity / entropy / enthalpy (1)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| sm excess printed: SE | 1 J·mol-1·K-1 | 1810.15 | liquid | model | [2] Kubišta 2000 | p. 3 report | Liquid Co-Cu alloys are characterized by positive values of the molar excess Gibbs energies GE at 1537 °C (Fig. 2, Table 4), positive values of the molar excess entropies SE (Table 4), and endothermic molar heat of mixing HE (Fig. 3, Table 4). At that temperature, the maximum HE value is 8294 J·mol-1 at 50at.%Cu, the maximum SE value is 1.00 J·mol-1·K-1 at 40at.%Cu, and the maximum GE value is 65… |
Activity / EMF / Gibbs energy (23)
| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---|---|---|---|---|---|---|
| Activity Co printed: a_Co | 0.856 1 | 1810.15 | liquid alloy: Co 0.8, Cu 0.2 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 3 report | |
| Activity Co printed: aCo | 0.746 1 | 1810.15 | liquid alloy: Co 0.4, Cu 0.6 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 7 report | |
| Activity Co printed: aCo | 0.703 1 | 1810.15 | liquid alloy: Co 0.3, Cu 0.7 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 8 report | |
| Activity Co printed: a_Co | 0.915 1 | 1810.15 | liquid alloy: Co 0.9, Cu 0.1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 2 report | |
| Activity Co printed: aCo | 0.413 1 | 1810.15 | liquid alloy: Co 0.1, Cu 0.9 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 10 report | |
| Activity Co printed: aCo | 0.769 1 | 1810.15 | liquid alloy: Co 0.5, Cu 0.5 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 6 report | |
| Activity Co printed: aCo | 0.816 1 | 1810.15 | liquid alloy: Co 0.7, Cu 0.3 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 4 report | |
| Activity Co printed: aCo | 0.61 1 | 1810.15 | liquid alloy: Co 0.2, Cu 0.8 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 9 report | |
| Activity Co printed: a_Co | 1 1 | 1810.15 | liquid alloy: Co 1, Cu 0 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 1 report | |
| Activity Co printed: a_Co | 0.79 1 | 1810.15 | liquid alloy: Co 0.6, Cu 0.4 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 5 report | |
| Activity Co printed: aCo | 0 1 | 1810.15 | liquid alloy: Co 0, Cu 1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 11 report | |
| Activity Cu printed: a_Cu | 0.608 1 | 1810.15 | liquid alloy: Co 0.8, Cu 0.2 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 3 report | |
| Activity Cu printed: aCu | 0.796 1 | 1810.15 | liquid alloy: Co 0.4, Cu 0.6 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 7 report | |
| Activity Cu printed: aCu | 0.821 1 | 1810.15 | liquid alloy: Co 0.3, Cu 0.7 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 8 report | |
| Activity Cu printed: a_Cu | 0.406 1 | 1810.15 | liquid alloy: Co 0.9, Cu 0.1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 2 report | |
| Activity Cu printed: aCu | 0.916 1 | 1810.15 | liquid alloy: Co 0.1, Cu 0.9 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 10 report | |
| Activity Cu printed: aCu | 0.776 1 | 1810.15 | liquid alloy: Co 0.5, Cu 0.5 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 6 report | |
| Activity Cu printed: aCu | 0.705 1 | 1810.15 | liquid alloy: Co 0.7, Cu 0.3 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 4 report | |
| Activity Cu printed: aCu | 0.859 1 | 1810.15 | liquid alloy: Co 0.2, Cu 0.8 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 9 report | |
| Activity Cu printed: a_Cu | 0 1 | 1810.15 | liquid alloy: Co 1, Cu 0 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 1 report | |
| Activity Cu printed: a_Cu | 0.751 1 | 1810.15 | liquid alloy: Co 0.6, Cu 0.4 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 5 report | |
| Activity Cu printed: aCu | 1 1 | 1810.15 | liquid alloy: Co 0, Cu 1 | experimental | [2] Kubišta 2000 | Table 4, p. 4, row 11 report | |
| Gibbs energy printed: GE | 6545 J·mol-1 | 1810.15 | liquid | model | [2] Kubišta 2000 | p. 3 report | Liquid Co-Cu alloys are characterized by positive values of the molar excess Gibbs energies GE at 1537 °C (Fig. 2, Table 4), positive values of the molar excess entropies SE (Table 4), and endothermic molar heat of mixing HE (Fig. 3, Table 4). At that temperature, the maximum HE value is 8294 J·mol-1 at 50at.%Cu, the maximum SE value is 1.00 J·mol-1·K-1 at 40at.%Cu, and the maximum GE value is 65… |
Sources
Reporting papers the values were read from (a value cited from another work names that work in its row).
- M. A. Turchanin, P. G. Agraval, Phase equilibria and thermodynamics of binary copper systems with 3d-metals. V. Copper-cobalt system, Powder Metall Met Ceram 46, 77-89 (2007). doi:10.1007/s11106-007-0013-9
- Jaroslav Kubišta, Jan Vřešt’ál, Thermodynamics of the liquid Co-Cu system and calculation of phase diagram, JPE 21, 125-129 (2000). doi:10.1361/105497100770340165