Co–Nb–Zr system

81 accepted literature values from 1 paper(s) (experimental 75, model 6); 0 calculated phase diagram(s). 48 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

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Accepted values by evidence class
Evidence class	Values
experimental	75
model	6

Accepted values by property group
Property group	Values
invariant reaction	6
phase equilibrium	75

Invariant reactions (literature)

Invariant reactions reported in the literature for the Co–Nb–Zr system (6)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1672.15	eutectic: Liq. -> CoZr + λ2 + μ	Liq.: Co 0.55, Zr 0.327	model	[1] Sun 2023	Table VII, p. 23, row 1 report
1657.15	quasi-peritectic: Liq. + λ2 -> λ1 + μ	Liq.: Co 0.571, Zr 0.002	model	[1] Sun 2023	Table VII, p. 23, row 2 report
1522.15	eutectic: Liq. -> Co23Zr6 + fcc(Co) + λ2	Liq.: Co 0.878, Zr 0.072	model	[1] Sun 2023	Table VII, p. 23, row 4 report
1512.15	eutectic: Liq. -> fcc(Co) + λ2 + λ3	Liq.: Co 0.847	model	[1] Sun 2023	Table VII, p. 23, row 5 report
1447.15	quasi-peritectic: Liq. + μ -> bcc(Nb,Zr) + CoZr	Liq.: Co 0.349, Zr 0.338	model	[1] Sun 2023	Table VII, p. 23, row 6 report
1285.15	eutectic: Liq. -> bcc(Nb,Zr) + CoZr2 + CoZr	Liq.: Co 0.304, Zr 0.514	model	[1] Sun 2023	Table VII, p. 23, row 7 report

Other properties

Phase equilibrium (75)

Phase equilibrium, Co–Nb–Zr system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition		CoZr CoZr: Co 0.454, Nb 0.12, Zr 0.416	experimental	[1] Sun 2023	Table II, p. 4, row 1 report
Phase composition		CoZr2 CoZr2: Co 0.282, Nb 0.08, Zr 0.638	experimental	[1] Sun 2023	Table II, p. 4, row 15 report
Phase composition		CoZr2 CoZr2: Co 0.279, Nb 0.105, Zr 0.656	experimental	[1] Sun 2023	Table II, p. 4, row 16 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.024, Nb 0.868, Zr 0.108	experimental	[1] Sun 2023	Table II, p. 4, row 20 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.058, Nb 0.935, Zr 0.007	experimental	[1] Sun 2023	Table II, p. 4, row 23 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.029, Nb 0.908, Zr 0.063	experimental	[1] Sun 2023	Table II, p. 4, row 21 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.037, Nb 0.698, Zr 0.265	experimental	[1] Sun 2023	Table II, p. 4, row 18 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.055, Nb 0.426, Zr 0.519	experimental	[1] Sun 2023	Table II, p. 4, row 17 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.03, Nb 0.832, Zr 0.138	experimental	[1] Sun 2023	Table II, p. 4, row 19 report
Phase composition		bcc(Nb,Zr) bcc(Nb,Zr): Co 0.048, Nb 0.911, Zr 0.041	experimental	[1] Sun 2023	Table II, p. 4, row 22 report
Phase composition		λ2 λ2: Co 0.637, Nb 0.106, Zr 0.257	experimental	[1] Sun 2023	Table II, p. 4, row 3 report
Phase composition		λ2 λ2: Co 0.653, Nb 0.084, Zr 0.264	experimental	[1] Sun 2023	Table II, p. 4, row 2 report
Phase composition		μ μ: Co 0.592, Nb 0.365, Zr 0.043	experimental	[1] Sun 2023	Table II, p. 4, row 6 report
Phase composition		μ μ: Co 0.504, Nb 0.483, Zr 0.013	experimental	[1] Sun 2023	Table II, p. 4, row 7 report
Phase composition		μ μ: Co 0.419, Nb 0.543, Zr 0.038	experimental	[1] Sun 2023	Table II, p. 4, row 14 report
Phase composition		μ μ: Co 0.416, Nb 0.309, Zr 0.275	experimental	[1] Sun 2023	Table II, p. 4, row 9 report
Phase composition		μ μ: Co 0.365, Nb 0.332, Zr 0.303	experimental	[1] Sun 2023	Table II, p. 4, row 4 report
Phase composition		μ μ: Co 0.417, Nb 0.527, Zr 0.056	experimental	[1] Sun 2023	Table II, p. 4, row 13 report
Phase composition		μ μ: Co 0.418, Nb 0.474, Zr 0.108	experimental	[1] Sun 2023	Table II, p. 4, row 11 report
Phase composition		μ μ: Co 0.41, Nb 0.345, Zr 0.245	experimental	[1] Sun 2023	Table II, p. 4, row 10 report
Phase composition		μ μ: Co 0.554, Nb 0.309, Zr 0.137	experimental	[1] Sun 2023	Table II, p. 4, row 5 report
Phase composition		μ μ: Co 0.423, Nb 0.506, Zr 0.071	experimental	[1] Sun 2023	Table II, p. 4, row 12 report
Phase composition		μ μ: Co 0.413, Nb 0.442, Zr 0.145	experimental	[1] Sun 2023	Table II, p. 4, row 8 report
Phase composition	1273.15	Co23Zr6 + λ2 Co23Zr6: Co 0.789, Nb 0.004, Zr 0.207; λ2: Co 0.723, Nb 0.036, Zr 0.241	experimental	[1] Sun 2023	Table IV, p. 16, row 8 report
Phase composition	1273.15	Co23Zr6 + λ2 Co23Zr6: Co 0.788, Nb 0.012, Zr 0.2; λ2: Co 0.737, Nb 0.057, Zr 0.206	experimental	[1] Sun 2023	Table IV, p. 16, row 7 report
Phase composition	1273.15	Co23Zr6 + λ2 Co23Zr6: Co 0.791, Nb 0.019, Zr 0.19; λ2: Co 0.733, Nb 0.086, Zr 0.181	experimental	[1] Sun 2023	Table IV, p. 16, row 6 report
Phase composition	1273.15	CoZr + CoZr2 CoZr: Co 0.487, Nb 0.026, Zr 0.487; CoZr2: Co 0.321, Nb 0.081, Zr 0.598	experimental	[1] Sun 2023	Table IV, p. 16, row 19 report
Phase composition	1273.15	CoZr + CoZr2 CoZr: Co 0.489, Nb 0.02, Zr 0.491; CoZr2: Co 0.32, Nb 0.069, Zr 0.611	experimental	[1] Sun 2023	Table IV, p. 16, row 20 report
Phase composition	1273.15	CoZr + CoZr2 CoZr: Co 0.493, Nb 0.007, Zr 0.5; CoZr2: Co 0.335, Nb 0.037, Zr 0.628	experimental	[1] Sun 2023	Table IV, p. 16, row 21 report
Phase composition	1273.15	CoZr + CoZr2 + μ CoZr: Co 0.491, Nb 0.085, Zr 0.424; CoZr2: Co 0.341, Nb 0.083, Zr 0.576; μ: Co 0.011, Nb 0.922, Zr 0.067	experimental	[1] Sun 2023	Table IV, p. 16, row 17 report
Phase composition	1273.15	CoZr + λ2 + μ CoZr: Co 0.505, Nb 0.113, Zr 0.382; λ2: Co 0.659, Nb 0.075, Zr 0.266; μ: Co 0.517, Nb 0.308, Zr 0.175	experimental	[1] Sun 2023	Table IV, p. 16, row 13 report
Phase composition	1273.15	CoZr + μ CoZr: Co 0.488, Nb 0.133, Zr 0.379; μ: Co 0.466, Nb 0.387, Zr 0.147	experimental	[1] Sun 2023	Table V, p. 18, row 3 report
Phase composition	1273.15	bcc(Nb,Zr) + COZr + μ bcc(Nb,Zr): Co 0.062, Nb 0.898, Zr 0.04; COZr: Co 0.494, Nb 0.128, Zr 0.378; μ: Co 0.463, Nb 0.384, Zr 0.153	experimental	[1] Sun 2023	Table IV, p. 16, row 16 report
Phase composition	1273.15	bcc(Nb,Zr) + CoZr bcc(Nb,Zr): Co 0.016, Nb 0.958, Zr 0.026; CoZr: Co 0.488, Nb 0.133, Zr 0.379	experimental	[1] Sun 2023	Table V, p. 18, row 5 report
Phase composition	1273.15	bcc(Nb,Zr) + CoZr2 + liquid bcc(Nb,Zr): Co 0.009, Nb 0.83, Zr 0.161; CoZr2: Co 0.319, Nb 0.087, Zr 0.594; liquid: Co 0.256, Nb 0.153, Zr 0.591	experimental	[1] Sun 2023	Table IV, p. 16, row 18 report
Phase composition	1273.15	bcc(Nb,Zr) + liquid bcc(Nb,Zr): Co 0.02, Nb 0.214, Zr 0.766; liquid: Co 0.227, Nb 0.117, Zr 0.656	experimental	[1] Sun 2023	Table IV, p. 16, row 22 report
Phase composition	1273.15	bcc(Nb,Zr) + liquid bcc(Nb,Zr): Co 0.023, Nb 0.093, Zr 0.884; liquid: Co 0.236, Nb 0.019, Zr 0.745	experimental	[1] Sun 2023	Table IV, p. 16, row 23 report
Phase composition	1273.15	bcc(Nb,Zr) + μ bcc(Nb,Zr): Co 0.021, Nb 0.966, Zr 0.013; μ: Co 0.442, Nb 0.495, Zr 0.063	experimental	[1] Sun 2023	Table IV, p. 16, row 15 report
Phase composition	1273.15	bcc(Nb,Zr) + μ bcc(Nb,Zr): Co 0.036, Nb 0.953, Zr 0.001; μ: Co 0.452, Nb 0.514, Zr 0.034	experimental	[1] Sun 2023	Table IV, p. 16, row 14 report
Phase composition	1273.15	bcc(Nb,Zr) + μ bcc(Nb,Zr): Co 0.016, Nb 0.958, Zr 0.026; μ: Co 0.466, Nb 0.387, Zr 0.147	experimental	[1] Sun 2023	Table V, p. 18, row 4 report
Phase composition	1273.15	fcc(Co) + Co23Zr6 + λ2 fcc(Co): Co 0.974, Nb 0.013, Zr 0.013; Co23Zr6: Co 0.794, Nb 0.028, Zr 0.179; λ2: Co 0.753, Nb 0.097, Zr 0.15	experimental	[1] Sun 2023	Table IV, p. 16, row 5 report
Phase composition	1273.15	fcc(Co) + λ2 fcc(Co): Co 0.968, Nb 0.026, Zr 0.006; λ2: Co 0.754, Nb 0.184, Zr 0.062	experimental	[1] Sun 2023	Table V, p. 18, row 1 report
Phase composition	1273.15	fcc(Co) + λ2 fcc(Co): Co 0.979, Nb 0.015, Zr 0.006; λ2: Co 0.757, Nb 0.142, Zr 0.101	experimental	[1] Sun 2023	Table IV, p. 16, row 3 report
Phase composition	1273.15	fcc(Co) + λ2 fcc(Co): Co 0.979, Nb 0.02, Zr 0.001; λ2: Co 0.748, Nb 0.208, Zr 0.044	experimental	[1] Sun 2023	Table IV, p. 16, row 1 report
Phase composition	1273.15	fcc(Co) + λ2 fcc(Co): Co 0.99, Nb 0.006, Zr 0.004; λ2: Co 0.754, Nb 0.128, Zr 0.118	experimental	[1] Sun 2023	Table IV, p. 16, row 4 report
Phase composition	1273.15	fcc(Co) + λ2 fcc(Co): Co 0.986, Nb 0.014, Zr 0; λ2: Co 0.75, Nb 0.167, Zr 0.083	experimental	[1] Sun 2023	Table IV, p. 16, row 2 report
Phase composition	1273.15	λ2 + μ λ2: Co 0.663, Nb 0.146, Zr 0.191; μ: Co 0.519, Nb 0.343, Zr 0.138	experimental	[1] Sun 2023	Table V, p. 18, row 2 report
Phase composition	1273.15	λ2 + μ λ2: Co 0.661, Nb 0.12, Zr 0.219; μ: Co 0.515, Nb 0.328, Zr 0.157	experimental	[1] Sun 2023	Table IV, p. 16, row 12 report
Phase composition	1273.15	λ2 + μ λ2: Co 0.653, Nb 0.19, Zr 0.157; μ: Co 0.523, Nb 0.378, Zr 0.099	experimental	[1] Sun 2023	Table IV, p. 16, row 11 report
Phase composition	1273.15	λ2 + μ λ2: Co 0.635, Nb 0.333, Zr 0.032; μ: Co 0.498, Nb 0.484, Zr 0.018	experimental	[1] Sun 2023	Table IV, p. 16, row 9 report
Phase composition	1273.15	λ2 + μ λ2: Co 0.66, Nb 0.218, Zr 0.122; μ: Co 0.491, Nb 0.474, Zr 0.035	experimental	[1] Sun 2023	Table IV, p. 16, row 10 report
Phase composition	1373.15	Co23Zr6 + λ2 Co23Zr6: Co 0.788, Nb 0.006, Zr 0.206; λ2: Co 0.722, Nb 0.065, Zr 0.213	experimental	[1] Sun 2023	Table III, p. 11, row 9 report
Phase composition	1373.15	Co23Zr6 + λ2 Co23Zr6: Co 0.79, Nb 0.023, Zr 0.187; λ2: Co 0.742, Nb 0.093, Zr 0.165	experimental	[1] Sun 2023	Table III, p. 11, row 6 report
Phase composition	1373.15	Co23Zr6 + λ2 Co23Zr6: Co 0.791, Nb 0.011, Zr 0.198; λ2: Co 0.729, Nb 0.07, Zr 0.201	experimental	[1] Sun 2023	Table III, p. 11, row 8 report
Phase composition	1373.15	Co23Zr6 + λ2 Co23Zr6: Co 0.792, Nb 0.016, Zr 0.192; λ2: Co 0.738, Nb 0.073, Zr 0.189	experimental	[1] Sun 2023	Table III, p. 11, row 7 report
Phase composition	1373.15	CoZr + liquid CoZr: Co 0.484, Nb 0.076, Zr 0.44; liquid: Co 0.347, Nb 0.139, Zr 0.514	experimental	[1] Sun 2023	Table III, p. 11, row 20 report
Phase composition	1373.15	CoZr + liquid CoZr: Co 0.497, Nb 0.035, Zr 0.468; liquid: Co 0.345, Nb 0.114, Zr 0.541	experimental	[1] Sun 2023	Table III, p. 11, row 19 report
Phase composition	1373.15	CoZr + liquid CoZr: Co 0.489, Nb 0.026, Zr 0.485; liquid: Co 0.357, Nb 0.031, Zr 0.612	experimental	[1] Sun 2023	Table III, p. 11, row 18 report
Phase composition	1373.15	CoZr + λ2 + μ CoZr: Co 0.503, Nb 0.119, Zr 0.378; λ2: Co 0.662, Nb 0.071, Zr 0.267; μ: Co 0.517, Nb 0.304, Zr 0.179	experimental	[1] Sun 2023	Table III, p. 11, row 14 report
Phase composition	1373.15	CoZr + μ CoZr: Co 0.499, Nb 0.109, Zr 0.392; μ: Co 0.489, Nb 0.333, Zr 0.178	experimental	[1] Sun 2023	Table III, p. 11, row 15 report
Phase composition	1373.15	bcc(Nb,Zr) + CoZr + liquid bcc(Nb,Zr): Co 0.017, Nb 0.921, Zr 0.062; CoZr: Co 0.489, Nb 0.111, Zr 0.4; liquid: Co 0.331, Nb 0.213, Zr 0.456	experimental	[1] Sun 2023	Table III, p. 11, row 21 report
Phase composition	1373.15	bcc(Nb,Zr) + liquid bcc(Nb,Zr): Co 0.017, Nb 0.54, Zr 0.443; liquid: Co 0.287, Nb 0.237, Zr 0.476	experimental	[1] Sun 2023	Table III, p. 11, row 22 report
Phase composition	1373.15	bcc(Nb,Zr) + liquid bcc(Nb,Zr): Co 0.012, Nb 0.137, Zr 0.851; liquid: Co 0.228, Nb 0.037, Zr 0.735	experimental	[1] Sun 2023	Table III, p. 11, row 24 report
Phase composition	1373.15	bcc(Nb,Zr) + liquid bcc(Nb,Zr): Co 0.008, Nb 0.429, Zr 0.563; liquid: Co 0.244, Nb 0.189, Zr 0.567	experimental	[1] Sun 2023	Table III, p. 11, row 23 report
Phase composition	1373.15	bcc(Nb,Zr) + μ bcc(Nb,Zr): Co 0.018, Nb 0.963, Zr 0.019; μ: Co 0.469, Nb 0.446, Zr 0.085	experimental	[1] Sun 2023	Table III, p. 11, row 17 report
Phase composition	1373.15	bcc(Nb,Zr) + μ bcc(Nb,Zr): Co 0.024, Nb 0.967, Zr 0.098; μ: Co 0.445, Nb 0.523, Zr 0.032	experimental	[1] Sun 2023	Table III, p. 11, row 16 report
Phase composition	1373.15	fcc(Co) + Co23Zr6 + λ2 fcc(Co): Co 0.97, Nb 0.017, Zr 0.013; Co23Zr6: Co 0.795, Nb 0.031, Zr 0.174; λ2: Co 0.752, Nb 0.103, Zr 0.145	experimental	[1] Sun 2023	Table III, p. 11, row 5 report
Phase composition	1373.15	fcc(Co) + λ2 fcc(Co): Co 0.974, Nb 0.018, Zr 0.008; λ2: Co 0.754, Nb 0.131, Zr 0.115	experimental	[1] Sun 2023	Table III, p. 11, row 4 report
Phase composition	1373.15	fcc(Co) + λ2 fcc(Co): Co 0.975, Nb 0.021, Zr 0.004; λ2: Co 0.751, Nb 0.15, Zr 0.099	experimental	[1] Sun 2023	Table III, p. 11, row 3 report
Phase composition	1373.15	fcc(Co) + λ2 fcc(Co): Co 0.964, Nb 0.03, Zr 0.006; λ2: Co 0.771, Nb 0.153, Zr 0.076	experimental	[1] Sun 2023	Table III, p. 11, row 2 report
Phase composition	1373.15	fcc(Co) + λ2 fcc(Co): Co 0.963, Nb 0.033, Zr 0.004; λ2: Co 0.74, Nb 0.253, Zr 0.007	experimental	[1] Sun 2023	Table III, p. 11, row 1 report
Phase composition	1373.15	λ2 + μ λ2: Co 0.653, Nb 0.331, Zr 0.116; μ: Co 0.512, Nb 0.481, Zr 0.007	experimental	[1] Sun 2023	Table III, p. 11, row 10 report
Phase composition	1373.15	λ2 + μ λ2: Co 0.655, Nb 0.149, Zr 0.196; μ: Co 0.491, Nb 0.435, Zr 0.074	experimental	[1] Sun 2023	Table III, p. 11, row 13 report
Phase composition	1373.15	λ2 + μ λ2: Co 0.659, Nb 0.201, Zr 0.14; μ: Co 0.508, Nb 0.43, Zr 0.062	experimental	[1] Sun 2023	Table III, p. 11, row 12 report
Phase composition	1373.15	λ2 + μ λ2: Co 0.663, Nb 0.246, Zr 0.091; μ: Co 0.492, Nb 0.466, Zr 0.042	experimental	[1] Sun 2023	Table III, p. 11, row 11 report

Sources

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

Jiaxing Sun, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Description of the Co–Nb–Zr System, Metall Mater Trans A 54, 3021-3044 (2023). doi:10.1007/s11661-023-07089-7

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 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_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}
}