Cu–Sc system

20 accepted literature values from 1 paper(s) (experimental 13, model 7); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	13
model	7

Accepted values by property group
Property group	Values
invariant reaction	14
phase transition	6

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
CuSc-08GTT.tdb	GTT, unpublished, 2008.	`b0ac063c12480fa624b2c3d86a08bcd43d39e0a1278181e76d9f6d13b12edd16`	viewer · TDB · JSON
CuSc-10Bo.tdb	H. Bo, L.B. Liu, Z.P. Jin, J. Alloys Compd., 490, 318-25(2010). doi:10.1016/j.jallcom.2009.10.003	`6224a1e249a15cfb1f228c7147ec8da0a1af5a0d2be12a8438cb10be28c8d8fc`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CuSc-08GTT.tdb	1634.6	LIQUID (x(Sc) 0.90971) + HCP_A3 (x(Sc) 0.9937) + BCC_A2 (x(Sc) 0.99867)
CuSc-08GTT.tdb	1163.2	LIQUID (x(Sc) 0.29978) + CU2SC_C11B (x(Sc) 0.33333) + CUSC_B2 (x(Sc) 0.5)
CuSc-08GTT.tdb	1163.19	LIQUID (x(Sc) 0.29951) + CU2SC_C11B (x(Sc) 0.33333) + CUSC_B2 (x(Sc) 0.5)
CuSc-08GTT.tdb	1163.19	LIQUID (x(Sc) 0.29949) + CU2SC_C11B (x(Sc) 0.33333) + CUSC_B2 (x(Sc) 0.5)
CuSc-08GTT.tdb	1156.7	FCC_A1 (x(Sc) 0.00414) + LIQUID (x(Sc) 0.13708) + CU4SC_D1A (x(Sc) 0.2)
CuSc-08GTT.tdb	1156.7	FCC_A1 (x(Sc) 0.00413) + LIQUID (x(Sc) 0.13701) + CU4SC_D1A (x(Sc) 0.2)
CuSc-08GTT.tdb	1147.03	CU4SC_D1A (x(Sc) 0.2) + LIQUID (x(Sc) 0.27667) + CU2SC_C11B (x(Sc) 0.33333)
CuSc-08GTT.tdb	1147.03	CU4SC_D1A (x(Sc) 0.2) + LIQUID (x(Sc) 0.27638) + CU2SC_C11B (x(Sc) 0.33333)
CuSc-08GTT.tdb	1146.42	CUSC_B2 (x(Sc) 0.5) + LIQUID (x(Sc) 0.70638) + HCP_A3 (x(Sc) 0.99146)
CuSc-08GTT.tdb	1146.42	CUSC_B2 (x(Sc) 0.5) + LIQUID (x(Sc) 0.70633) + HCP_A3 (x(Sc) 0.99146)
CuSc-10Bo.tdb	1594.74	LIQUID (x(Sc) 0.88866) + BCC_A2 (x(Sc) 0.98615) + HCP_A3 (x(Sc) 0.98858)
CuSc-10Bo.tdb	1166.01	LIQUID (x(Sc) 0.32193) + CU2SC_C11B (x(Sc) 0.33333) + CUSC_B2 (x(Sc) 0.5)
CuSc-10Bo.tdb	1166.01	LIQUID (x(Sc) 0.32187) + CU2SC_C11B (x(Sc) 0.33333) + CUSC_B2 (x(Sc) 0.5)
CuSc-10Bo.tdb	1166.01	LIQUID (x(Sc) 0.3223) + CU2SC_C11B (x(Sc) 0.33333) + CUSC_B2 (x(Sc) 0.5)
CuSc-10Bo.tdb	1143.97	CU4SC_D1A (x(Sc) 0.2) + LIQUID (x(Sc) 0.27839) + CU2SC_C11B (x(Sc) 0.33333)
CuSc-10Bo.tdb	1143.97	CU4SC_D1A (x(Sc) 0.2) + LIQUID (x(Sc) 0.27805) + CU2SC_C11B (x(Sc) 0.33333)
CuSc-10Bo.tdb	1141.23	FCC_A1 (x(Sc) 0.005) + LIQUID (x(Sc) 0.12624) + CU4SC_D1A (x(Sc) 0.2)
CuSc-10Bo.tdb	1141.23	FCC_A1 (x(Sc) 0.005) + LIQUID (x(Sc) 0.12613) + CU4SC_D1A (x(Sc) 0.2)
CuSc-10Bo.tdb	1124.64	CUSC_B2 (x(Sc) 0.5) + LIQUID (x(Sc) 0.70317) + HCP_A3 (x(Sc) 0.99055)
CuSc-10Bo.tdb	1124.64	CUSC_B2 (x(Sc) 0.5) + LIQUID (x(Sc) 0.70313) + HCP_A3 (x(Sc) 0.99056)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CuSc-08GTT

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cu–Sc system (14)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1641	Liquid + βSc ↔ αSc	L: Sc 0.919; βSc: Sc 0.994; αSc: Sc 1	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 19 report
1595	Liquid + αSc ↔ βSc	L: Sc 0.889; αSc: Sc 0.989; βSc: Sc 0.986	model	[1] Bo 2010	Table 3, p. 6, row 20 report
1165	Liquid + CuSc ↔ Cu2Sc	L: Sc 0.285; CuSc: Sc 0.5; Cu2Sc: Sc 0.333	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 11 report
1163	Liquid + CuSc ↔ Cu2Sc	CuSc: Sc 0.5; Cu2Sc: Sc 0.333	experimental	[1] Bo 2010 cites Savitskii 1970	Table 3, p. 6, row 10 report
1163	Liquid + CuSc ↔ Cu2Sc	L: Sc 0.312; CuSc: Sc 0.5; Cu2Sc: Sc 0.333	model	[1] Bo 2010	Table 3, p. 6, row 12 report
1148	Liquid ↔ CuSc + αSc	L: Sc 0.71; CuSc: Sc 0.5; αSc: Sc 0.99	experimental	[1] Bo 2010 cites Savitskii 1970	Table 3, p. 6, row 16 report
1148	Liquid ↔ Cu4Sc + Cu2Sc	L: Sc 0.3; Cu4Sc: Sc 0.2; Cu2Sc: Sc 0.333	experimental	[1] Bo 2010 cites Savitskii 1970	Table 3, p. 6, row 7 report
1145	Liquid ↔ CuSc + αSc	L: Sc 0.738; CuSc: Sc 0.5; αSc: Sc 0.989	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 17 report
1145	Liquid ↔ CuSc + αSc	L: Sc 0.708; CuSc: Sc 0.5; αSc: Sc 0.99	model	[1] Bo 2010	Table 3, p. 6, row 18 report
1144	Liquid ↔ Cu4Sc + Cu2Sc	L: Sc 0.278; Cu4Sc: Sc 0.2; Cu2Sc: Sc 0.333	model	[1] Bo 2010	Table 3, p. 6, row 9 report
1141	Liquid ↔ Fcc_Cu + Cu4Sc	L: Sc 0.126; Fcc_Cu: Sc 0.005; Cu4Sc: Sc 0.2	model	[1] Bo 2010	Table 3, p. 6, row 3 report
1141	Liquid ↔ Cu4Sc + Cu2Sc	L: Sc 0.263; Cu4Sc: Sc 0.2; Cu2Sc: Sc 0.333	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 8 report
1140	Liquid ↔ Fcc_Cu + Cu4Sc	L: Sc 0.132; Fcc_Cu: Sc 0.0048; Cu4Sc: Sc 0.2	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 2 report
1138	Liquid ↔ Fcc_Cu + Cu4Sc	L: Sc 0.13; Fcc_Cu: Sc 0.005; Cu4Sc: Sc 0.2	experimental	[1] Bo 2010 cites Savitskii 1970	Table 3, p. 6, row 1 report

Other properties

Phase transition (6)

Phase transition, Cu–Sc system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1198 K	1198	Liquid ↔ Cu4Sc L: Sc 0.2; Cu4Sc: Sc 0.2	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 5 report
Phase transition	1198 K	1198	Liquid ↔ Cu4Sc L: Sc 0.2; Cu4Sc: Sc 0.2	experimental	[1] Bo 2010 cites Savitskii 1970	Table 3, p. 6, row 4 report
Phase transition	1198 K	1198	Liquid ↔ Cu4Sc L: Sc 0.2; Cu4Sc: Sc 0.2	model	[1] Bo 2010	Table 3, p. 6, row 6 report
Phase transition	1398 K	1398	Liquid ↔ CuSc L: Sc 0.5; CuSc: Sc 0.5	experimental	[1] Bo 2010 cites Savitskii 1970	Table 3, p. 6, row 13 report
Phase transition	1399 K	1399	Liquid ↔ CuSc L: Sc 0.5; CuSc: Sc 0.5	model	[1] Bo 2010	Table 3, p. 6, row 15 report
Phase transition	1399 K	1399	Liquid ↔ CuSc L: Sc 0.5; CuSc: Sc 0.5	experimental	[1] Bo 2010 cites Turchanin 2006 doi	Table 3, p. 6, row 14 report

Sources

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

H. Bo, L.B. Liu, Z.P. Jin, Thermodynamic analysis of Al–Sc, Cu–Sc and Al–Cu–Sc system, Journal of Alloys and Compounds 490, 318-325 (2010). doi:10.1016/j.jallcom.2009.10.003

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}
}