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

Accepted values by evidence class
Evidence classValues
experimental63
model12
Accepted values by property group
Property groupValues
invariant reaction12
phase equilibrium10
mixing / partial29
heat capacity / entropy / enthalpy1
activity / EMF / Gibbs energy23

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.

Assessments with a calculated phase diagram
TDB fileAssessmentSHA-256Links
CoCu-00Kub-LB.tdbJ. Kubista, J. Vrestal, J. Phase Equilib., 21, 125-29(2000). doi:10.1361/105497100770340165e190588a17897dcba6dee61dc2e7c674ce36a207c0491726a8d9c2ca5913041fviewer · TDB · JSON
CoCu-06Pal.tdbM. Palumbo, S. Curiotto, L. Battezzati, Calphad, 30, 171-78(2006). doi:10.1016/j.calphad.2005.10.007e6f9f7cd2524034b8162b1891c3380d13aeb1840c86a06d8af76ef1067602cdbviewer · TDB · JSON
CoCu-80Has.tdbM. Haseba, T. Nishizawa, Calphad, 4, 83-100(1980). doi:10.1016/0364-5916(80)90026-7aab8a56c0d106053f31f3346e4d994f30859ea4ec8d0585fc2ed300addb40897viewer · TDB · JSON
CoCu-97Oht.tdbH. Ohtani, H. Suda, K. Ishida, ISIJ Int., 37, 207-16(1997). doi:10.2355/isijinternational.37.207dadbec645d9a2e07431ab1aa232a27aa4c28926f0a630e2a5ca264ea88d1ccc8viewer · TDB · JSON
Calculated three-phase invariants (model, mole fraction of the second component)
TDB fileT (K)Phases at the invariant
CoCu-00Kub-LB.tdb1380.75FCC_A1#2 (x(Cu) 0.09852) + FCC_A1 (x(Cu) 0.91183) + LIQUID (x(Cu) 0.92261)
CoCu-00Kub-LB.tdb709.66FCC_A1 (x(Cu) 0.00244) + HCP_A3 (x(Cu) 0.00404) + FCC_A1#2 (x(Cu) 0.99747)
CoCu-06Pal.tdb1378.27FCC_A1#2 (x(Cu) 0.12484) + FCC_A1 (x(Cu) 0.90809) + LIQUID (x(Cu) 0.94667)
CoCu-06Pal.tdb685.61HCP_A3 (x(Cu) 0.00136) + FCC_A1#2 (x(Cu) 0.00239) + FCC_A1 (x(Cu) 0.99954)
CoCu-80Has.tdb1383.32FCC_A1 (x(Cu) 0.10876) + FCC_A1#2 (x(Cu) 0.91943) + LIQUID (x(Cu) 0.94877)
CoCu-80Has.tdb692.73HCP_A3 (x(Cu) 2.100e-4) + FCC_A1#2 (x(Cu) 4.500e-4) + FCC_A1 (x(Cu) 0.99971)
CoCu-97Oht.tdb1383.35FCC_A1 (x(Cu) 0.10917) + FCC_A1#2 (x(Cu) 0.91939) + LIQUID (x(Cu) 0.94878)
CoCu-97Oht.tdb692.65HCP_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)

Invariant reactions reported in the literature for the Co–Cu system (12)
T (K)Reaction / phasesCompositions (mole fraction)ClassSourceLocationQuote
1386L + (αCo) <=> (αCu)L: Co 0.057; (αCo): Co 0.883model[1] Turchanin 2007Table 1, p. 6, row 12
report
1385L + (αCo) <=> (αCu)L: Co 0.051; (αCo): Co 0.874model[1] Turchanin 2007
cites ref. 13
Table 1, p. 6, row 10
report
1385L + (αCo) <=> (αCu)L: Co 0.048; (αCo): Co 0.88experimental[1] Turchanin 2007
cites ref. 27
Table 1, p. 6, row 3
report
1385L + (αCo) <=> (αCu)experimental[1] Turchanin 2007
cites ref. 28
Table 1, p. 6, row 4
report
1381L + (αCo) <=> (αCu)L: Co 0.077; (αCo): Co 0.902model[1] Turchanin 2007
cites ref. 15
Table 1, p. 6, row 11
report
1379L + (αCo) <=> (αCu)L: Co 0.04; (αCo): Co 0.876model[1] Turchanin 2007
cites ref. 6
Table 1, p. 6, row 8
report
1370L + (αCo) <=> (αCu)L: Co 0.073; (αCo): Co 0.876model[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 0.994model[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 0.9977model[1] Turchanin 2007Table 1, p. 6, row 20
report
695(αCo) <=> (Cu) + (εCo)(αCo): Co 0.999; (Cu): Co 4.000e-4; (εCo): Co 0.9996model[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 0.9995model[1] Turchanin 2007
cites ref. 6
Table 1, p. 6, row 17
report
615(αCo) <=> (Cu) + (εCo)(αCo): Co 0.905experimental[1] Turchanin 2007
cites ref. 27
Table 1, p. 6, row 13
report

Other properties

Phase equilibrium (10)

Phase equilibrium, Co–Cu system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Phase compositionCo-rich phase
Co-rich phase: Co 0.9492, Cu 0.0508
experimental[2] Kubišta 2000Table 1, p. 3, row 10
report
Phase compositionCo-rich phase
Co-rich phase: Co 0.9848, Cu 0.0152
experimental[2] Kubišta 2000Table 1, p. 3, row 9
report
Phase compositionCo-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 2000Table 1, p. 3, row 6
report
Phase compositionCo-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 2000Table 1, p. 3, row 4
report
Phase compositionCo-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 2000Table 1, p. 3, row 1
report
Phase compositionCo-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 2000Table 1, p. 3, row 7
report
Phase compositionCo-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 2000Table 1, p. 3, row 5
report
Phase compositionCo-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 2000Table 1, p. 3, row 2
report
Phase compositionCo-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 2000Table 1, p. 3, row 8
report
Phase compositionCo-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 2000Table 1, p. 3, row 3
report

Mixing / partial (29)

Mixing / partial, Co–Cu system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Enthalpy of mixing
printed: ΔH^E
5.575 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.8, Cu 0.2
experimental[2] Kubišta 2000Table 4, p. 4, row 3
report
Enthalpy of mixing
printed: ΔHE
7.828 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.4, Cu 0.6
experimental[2] Kubišta 2000Table 4, p. 4, row 7
report
Enthalpy of mixing
printed: ΔHE
6.733 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.3, Cu 0.7
experimental[2] Kubišta 2000Table 4, p. 4, row 8
report
Enthalpy of mixing
printed: ΔH^E
3.186 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.9, Cu 0.1
experimental[2] Kubišta 2000Table 4, p. 4, row 2
report
Enthalpy of mixing
printed: HE
8.294 kJ/mol (basis unstated)1810.15liquidmodel[2] Kubišta 2000p. 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)1810.15liquid
alloy: Co 0.1, Cu 0.9
experimental[2] Kubišta 2000Table 4, p. 4, row 10
report
Enthalpy of mixing
printed: ΔHE
8.294 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.5, Cu 0.5
experimental[2] Kubišta 2000Table 4, p. 4, row 6
report
Enthalpy of mixing
printed: ΔHE
7.201 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.7, Cu 0.3
experimental[2] Kubišta 2000Table 4, p. 4, row 4
report
Enthalpy of mixing
printed: ΔHE
5.04 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.2, Cu 0.8
experimental[2] Kubišta 2000Table 4, p. 4, row 9
report
Enthalpy of mixing
printed: ΔH^E
8.096 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.6, Cu 0.4
experimental[2] Kubišta 2000Table 4, p. 4, row 5
report
Enthalpy of mixing
printed: mixing enthalpy
9.7 kJ/mol (basis unstated)1834experimental[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)/K1810.15liquid
alloy: Co 0.8, Cu 0.2
experimental[2] Kubišta 2000Table 4, p. 4, row 3
report
Entropy of mixing
printed: ΔSE
0.847 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.4, Cu 0.6
experimental[2] Kubišta 2000Table 4, p. 4, row 7
report
Entropy of mixing
printed: ΔSE
0.671 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.3, Cu 0.7
experimental[2] Kubišta 2000Table 4, p. 4, row 8
report
Entropy of mixing
printed: ΔS^E
0.468 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.9, Cu 0.1
experimental[2] Kubišta 2000Table 4, p. 4, row 2
report
Entropy of mixing
printed: ΔSE
0.227 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.1, Cu 0.9
experimental[2] Kubišta 2000Table 4, p. 4, row 10
report
Entropy of mixing
printed: ΔSE
0.966 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.5, Cu 0.5
experimental[2] Kubišta 2000Table 4, p. 4, row 6
report
Entropy of mixing
printed: ΔSE
0.952 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.7, Cu 0.3
experimental[2] Kubišta 2000Table 4, p. 4, row 4
report
Entropy of mixing
printed: ΔSE
0.457 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.2, Cu 0.8
experimental[2] Kubišta 2000Table 4, p. 4, row 9
report
Entropy of mixing
printed: ΔS^E
1.008 J/mol (basis unstated)/K1810.15liquid
alloy: Co 0.6, Cu 0.4
experimental[2] Kubišta 2000Table 4, p. 4, row 5
report
Gibbs energy of mixing
printed: ΔG^E
4.165 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.8, Cu 0.2
experimental[2] Kubišta 2000Table 4, p. 4, row 3
report
Gibbs energy of mixing
printed: ΔGE
6.295 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.4, Cu 0.6
experimental[2] Kubišta 2000Table 4, p. 4, row 7
report
Gibbs energy of mixing
printed: ΔGE
5.519 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.3, Cu 0.7
experimental[2] Kubišta 2000Table 4, p. 4, row 8
report
Gibbs energy of mixing
printed: ΔG^E
2.339 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.9, Cu 0.1
experimental[2] Kubišta 2000Table 4, p. 4, row 2
report
Gibbs energy of mixing
printed: ΔGE
2.374 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.1, Cu 0.9
experimental[2] Kubišta 2000Table 4, p. 4, row 10
report
Gibbs energy of mixing
printed: ΔGE
6.545 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.5, Cu 0.5
experimental[2] Kubišta 2000Table 4, p. 4, row 6
report
Gibbs energy of mixing
printed: ΔGE
5.477 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.7, Cu 0.3
experimental[2] Kubišta 2000Table 4, p. 4, row 4
report
Gibbs energy of mixing
printed: ΔGE
4.213 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.2, Cu 0.8
experimental[2] Kubišta 2000Table 4, p. 4, row 9
report
Gibbs energy of mixing
printed: ΔG^E
6.272 kJ/mol (basis unstated)1810.15liquid
alloy: Co 0.6, Cu 0.4
experimental[2] Kubišta 2000Table 4, p. 4, row 5
report

Heat capacity / entropy / enthalpy (1)

Heat capacity / entropy / enthalpy, Co–Cu system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
sm excess
printed: SE
1 J·mol-1·K-11810.15liquidmodel[2] Kubišta 2000p. 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)

Activity / EMF / Gibbs energy, Co–Cu system
PropertyValueT (K)Phases / compositionClassSourceLocationQuote
Activity Co
printed: a_Co
0.856 11810.15liquid
alloy: Co 0.8, Cu 0.2
experimental[2] Kubišta 2000Table 4, p. 4, row 3
report
Activity Co
printed: aCo
0.746 11810.15liquid
alloy: Co 0.4, Cu 0.6
experimental[2] Kubišta 2000Table 4, p. 4, row 7
report
Activity Co
printed: aCo
0.703 11810.15liquid
alloy: Co 0.3, Cu 0.7
experimental[2] Kubišta 2000Table 4, p. 4, row 8
report
Activity Co
printed: a_Co
0.915 11810.15liquid
alloy: Co 0.9, Cu 0.1
experimental[2] Kubišta 2000Table 4, p. 4, row 2
report
Activity Co
printed: aCo
0.413 11810.15liquid
alloy: Co 0.1, Cu 0.9
experimental[2] Kubišta 2000Table 4, p. 4, row 10
report
Activity Co
printed: aCo
0.769 11810.15liquid
alloy: Co 0.5, Cu 0.5
experimental[2] Kubišta 2000Table 4, p. 4, row 6
report
Activity Co
printed: aCo
0.816 11810.15liquid
alloy: Co 0.7, Cu 0.3
experimental[2] Kubišta 2000Table 4, p. 4, row 4
report
Activity Co
printed: aCo
0.61 11810.15liquid
alloy: Co 0.2, Cu 0.8
experimental[2] Kubišta 2000Table 4, p. 4, row 9
report
Activity Co
printed: a_Co
1 11810.15liquid
alloy: Co 1, Cu 0
experimental[2] Kubišta 2000Table 4, p. 4, row 1
report
Activity Co
printed: a_Co
0.79 11810.15liquid
alloy: Co 0.6, Cu 0.4
experimental[2] Kubišta 2000Table 4, p. 4, row 5
report
Activity Co
printed: aCo
0 11810.15liquid
alloy: Co 0, Cu 1
experimental[2] Kubišta 2000Table 4, p. 4, row 11
report
Activity Cu
printed: a_Cu
0.608 11810.15liquid
alloy: Co 0.8, Cu 0.2
experimental[2] Kubišta 2000Table 4, p. 4, row 3
report
Activity Cu
printed: aCu
0.796 11810.15liquid
alloy: Co 0.4, Cu 0.6
experimental[2] Kubišta 2000Table 4, p. 4, row 7
report
Activity Cu
printed: aCu
0.821 11810.15liquid
alloy: Co 0.3, Cu 0.7
experimental[2] Kubišta 2000Table 4, p. 4, row 8
report
Activity Cu
printed: a_Cu
0.406 11810.15liquid
alloy: Co 0.9, Cu 0.1
experimental[2] Kubišta 2000Table 4, p. 4, row 2
report
Activity Cu
printed: aCu
0.916 11810.15liquid
alloy: Co 0.1, Cu 0.9
experimental[2] Kubišta 2000Table 4, p. 4, row 10
report
Activity Cu
printed: aCu
0.776 11810.15liquid
alloy: Co 0.5, Cu 0.5
experimental[2] Kubišta 2000Table 4, p. 4, row 6
report
Activity Cu
printed: aCu
0.705 11810.15liquid
alloy: Co 0.7, Cu 0.3
experimental[2] Kubišta 2000Table 4, p. 4, row 4
report
Activity Cu
printed: aCu
0.859 11810.15liquid
alloy: Co 0.2, Cu 0.8
experimental[2] Kubišta 2000Table 4, p. 4, row 9
report
Activity Cu
printed: a_Cu
0 11810.15liquid
alloy: Co 1, Cu 0
experimental[2] Kubišta 2000Table 4, p. 4, row 1
report
Activity Cu
printed: a_Cu
0.751 11810.15liquid
alloy: Co 0.6, Cu 0.4
experimental[2] Kubišta 2000Table 4, p. 4, row 5
report
Activity Cu
printed: aCu
1 11810.15liquid
alloy: Co 0, Cu 1
experimental[2] Kubišta 2000Table 4, p. 4, row 11
report
Gibbs energy
printed: GE
6545 J·mol-11810.15liquidmodel[2] Kubišta 2000p. 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).

  1. 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
  2. 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