Cu–V system

11 accepted literature values from 1 paper(s) (experimental 10, model 1); 2 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 class	Values
experimental	10
model	1

Accepted values by property group
Property group	Values
invariant reaction	4
phase transition	3
phase equilibrium	2
mixing / partial	2

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 file	Assessment	SHA-256	Links
CuV-08Zha.tdb	J. Zhao, Y. Du, L.Zhang, H. Xu, Calphad, 32, 252-55(2008). doi:10.1016/j.calphad.2007.07.009	`2970e9de3cba0280cfad6348a28e7a3ec4da9f887e2979d7422fa6403a360238`	viewer · TDB · JSON
CuV-90Ham-LB.tdb	M. Hamalainen, K. Jaaskelainen, R. Luoma, M. Nuotio, P. Taskinen, O. Teppo, Calphad, 14, 125-37(1990). doi:10.1016/0364-5916(90)90014-Q	`95c1a097bca5335ce810fde5245c6cd234da735f42e2d235064f8d892a612784`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CuV-08Zha.tdb	1829.41	LIQUID (x(V) 0.02527) + LIQUID#2 (x(V) 0.76174) + BCC_A2 (x(V) 0.94716)
CuV-08Zha.tdb	1358.03	LIQUID (x(V) 0.00348) + FCC_A1 (x(V) 0.00368) + BCC_A2 (x(V) 0.97751)
CuV-90Ham-LB.tdb	2052.72	LIQUID (x(V) 0.21738) + LIQUID#2 (x(V) 0.81228) + BCC_A2 (x(V) 0.9475)
CuV-90Ham-LB.tdb	1358.14	LIQUID (x(V) 0.00157) + FCC_A1 (x(V) 0.00189) + BCC_A2 (x(V) 0.96956)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CuV-90Ham-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cu–V system (4)
T (K)	Reaction / phases	Class	Source	Location
1393.15	L + (V) -> (Cu)	experimental	[1] Zhao 2008 cites Savitskii 1964	Table 1, p. 2, row 2 report
1361.15	L + (V) -> (Cu)	experimental	[1] Zhao 2008 cites Stevens 1969	Table 1, p. 2, row 3 report
1360.15	L + (V) -> (Cu)	experimental	[1] Zhao 2008	Table 1, p. 2, row 4 report
1358.15	L + (V) -> (Cu)	experimental	[1] Zhao 2008 cites McHugh 1959	Table 1, p. 2, row 1 report

Other properties

Phase transition (3)

Phase transition, Cu–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1356.55 K	1356.55	peritectic: 2 alloy: Cu 0.985, V 0.015	experimental	[1] Zhao 2008	Table 2, p. 3, row 3 report
Phase transition	1357.75 K	1357.75	peritectic: 2 alloy: Cu 0.985, V 0.015	experimental	[1] Zhao 2008	Table 2, p. 3, row 4 report
Phase transition	1360.25 K	1360.25	3 alloy: Cu 0.5, V 0.5	experimental	[1] Zhao 2008	Table 2, p. 3, row 5 report

Phase equilibrium (2)

Phase equilibrium, Cu–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase composition		1354.45	congruent melting: 1 liquid: Cu 1, V 0	experimental	[1] Zhao 2008	Table 2, p. 3, row 1 report
Phase composition		1356.15	congruent melting: 1 liquid: Cu 1, V 0	experimental	[1] Zhao 2008	Table 2, p. 3, row 2 report

Mixing / partial (2)

Mixing / partial, Cu–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Enthalpy of mixing printed: enthalpy of mixing	80 unspecified ± 25	1373.15		experimental	[1] Zhao 2008 cites Watanabe 1984 doi	p. 4 report	Additionally, the presently calculated value for enthalpy of mixing of the Cu99.97 V0.03 melt at 1100 ◦ C is 56.34 kJ/mol. This computed datum agrees reasonably with the experimental one of 80 ± 25 kJ/mol from Watanabe and Kleppa [17].
Enthalpy of mixing printed: enthalpy of mixing	56.34 kJ/mol (basis unstated)	1373.15		model	[1] Zhao 2008	p. 4 report	Additionally, the presently calculated value for enthalpy of mixing of the Cu99.97 V0.03 melt at 1100 ◦ C is 56.34 kJ/mol.

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

Jingrui Zhao, Yong Du, Lijun Zhang, Honghui Xu, Thermodynamic reassessment of the Cu–V system supported by key experiments, Calphad 32, 252-255 (2008). doi:10.1016/j.calphad.2007.07.009

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}