Nd–Zr system

31 accepted literature values from 2 paper(s) (experimental 25, model 3, unspecified 3); 2 calculated phase diagram(s). 7 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 (5) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	25
model	3
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	6
phase transition	22
phase equilibrium	3

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
NdZr-14Che.tdb	K. Cheng, H. Zhou, B. Hu, Y. Du, L. Zhang, S. Liu, H. Xu, L. Liu, Metall. Mater. Trans. A, 45A, 2708-18(2014). doi:10.1007/s11661-014-2209-1	`5b20a92a0ab14f26f99f9c5ae58972d6c2946d1f7a9a69daff2e98a511c2b495`	viewer · TDB · JSON
NdZr-14Mat.tdb	N. Mattern, Y. Yokoyama, A. Mizuno, J.H. Han, O. Fabrichnaya, T. Harada, S. Kohara, J. Eckert, Calphad, 46, 103-7(2014). doi:10.1016/j.calphad.2014.02.008	`3f1e2816e533b3fb8a36461e09af7bbb63a59b41bfd4e3d9b742374d00541c85`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
NdZr-14Che.tdb	1953.85	LIQUID (x(Zr) 0.38306) + LIQUID#2 (x(Zr) 0.61694) + BCC_A2 (x(Zr) 0.91984)
NdZr-14Che.tdb	1267.2	LIQUID (x(Zr) 0.02529) + DHCP (x(Zr) 0.05141) + BCC_A2 (x(Zr) 0.97741)
NdZr-14Che.tdb	1258.1	BCC_A2 (x(Zr) 6.200e-4) + LIQUID (x(Zr) 0.01766) + DHCP (x(Zr) 0.03494)
NdZr-14Che.tdb	1112.49	DHCP (x(Zr) 0.03143) + BCC_A2 (x(Zr) 0.98873) + HCP_A3 (x(Zr) 0.99931)
NdZr-14Mat.tdb	1271.4	BCC_A2 (x(Zr) 0.02977) + LIQUID (x(Zr) 0.04013) + BCC_A2#2 (x(Zr) 0.97023)
NdZr-14Mat.tdb	1167.1	BCC_A2#2 (x(Zr) 0.02234) + HCP_A3 (x(Zr) 0.96568) + BCC_A2 (x(Zr) 0.97766)
NdZr-14Mat.tdb	1116.24	DHCP (x(Zr) 0.01487) + BCC_A2 (x(Zr) 0.01872) + HCP_A3 (x(Zr) 0.97122)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull NdZr-14Mat

Invariant reactions (literature)

Invariant reactions reported in the literature for the Nd–Zr system (6)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1274	eutectic: L -> bcc-Nd + bcc-Zr		experimental	[1] Mattern 2014	Table 3, p. 4, row 2 report
1271	eutectic: L -> bcc-Nd + bcc-Zr	L: Zr 0.04; bcc-Nd: Zr 0.03; bcc-Zr: Zr 0.97	model	[1] Mattern 2014	Table 3, p. 4, row 1 report
1167	bcc-Nd + bcc-Zr -> hcp-Zr	bcc-Nd: Zr 0.022; bcc-Zr: Zr 0.978; hcp-Zr: Zr 0.966	model	[1] Mattern 2014	Table 3, p. 4, row 3 report
1167	bcc-Nd + bcc-Zr -> hcp-Zr		experimental	[1] Mattern 2014	Table 3, p. 4, row 4 report
1118	bcc-Nd -> hcp-Zr + dhcp-Nd		experimental	[1] Mattern 2014	Table 3, p. 4, row 6 report
1116	bcc-Nd -> hcp-Zr + dhcp-Nd	bcc-Nd: Zr 0.019; hcp-Zr: Zr 0.971; dhcp-Nd: Zr 0.015	model	[1] Mattern 2014	Table 3, p. 4, row 5 report

Other properties

Phase transition (22)

Phase transition, Nd–Zr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1106.1 K	1106.1	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 1 report
Phase transition	1108.6 K	1108.6	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 11 report
Phase transition	1108.7 K	1108.7	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 31 report
Phase transition	1109.4 K	1109.4	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 23 report
Phase transition	1111.9 K	1111.9	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 19 report
Phase transition	1112.7 K	1112.7	(βZr) ↔ (αNd) + (αZr)	unspecified	[2] Cheng 2014	Table III, p. 7, row 8 report
Phase transition	1114 K	1114	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 27 report
Phase transition	1114.3 K	1114.3	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 7 report
Phase transition	1114.6 K	1114.6	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 15 report
Phase transition	1115.1 K	1115.1	(βZr) ↔ (αNd) + (αZr)	experimental	[2] Cheng 2014	Table III, p. 7, row 35 report
Phase transition	1256.2 K	1256.2	Liquid + (αNd)/(αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 3 report
Phase transition	1260 K	1260	Liquid + (αNd)/(αNd)	unspecified	[2] Cheng 2014	Table III, p. 7, row 4 report
Phase transition	1263 K	1263	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 9 report
Phase transition	1265.9 K	1265.9	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 17 report
Phase transition	1266 K	1266	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 13 report
Phase transition	1266.3 K	1266.3	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 5 report
Phase transition	1266.4 K	1266.4	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 37 report
Phase transition	1266.6 K	1266.6	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 29 report
Phase transition	1268 K	1268	Liquid + (βZr) ↔ (αNd)	unspecified	[2] Cheng 2014	Table III, p. 7, row 22 report
Phase transition	1268 K	1268	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 21 report
Phase transition	1269.5 K	1269.5	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 25 report
Phase transition	1270.3 K	1270.3	Liquid + (βZr) ↔ (αNd)	experimental	[2] Cheng 2014	Table III, p. 7, row 33 report

Phase equilibrium (3)

Phase equilibrium, Nd–Zr system
Property	Phases / composition	Class	Source	Location
Phase composition	Nd-dendrite + Eutectic Nd-dendrite: Nd 0.96, Zr 0.04; Eutectic: Nd 0.924, Zr 0.076	experimental	[1] Mattern 2014	Table 1, p. 4, row 1 report
Phase composition	Zr-dendrites + Nd-dendrite + Eutectic Zr-dendrites: Nd 0.044, Zr 0.956; Nd-dendrite: Nd 0.952, Zr 0.048; Eutectic: Nd 0.923, Zr 0.077	experimental	[1] Mattern 2014	Table 1, p. 4, row 2 report
Phase composition	Zr-dendrites + Nd-dendrite + Eutectic Zr-dendrites: Nd 0.05, Zr 0.95; Nd-dendrite: Nd 0.945, Zr 0.055; Eutectic: Nd 0.92, Zr 0.08	experimental	[1] Mattern 2014	Table 1, p. 4, row 3 report

Sources

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

N. Mattern, Y. Yokoyama, A. Mizuno, J.H. Han, O. Fabrichnaya, T. Harada et al., Experimental and thermodynamic assessment of the Nd–Zr system, Calphad 46, 103-107 (2014). doi:10.1016/j.calphad.2014.02.008
Kaiming Cheng, Hua Zhou, Biao Hu, Yong Du, Lijun Zhang, Shuhong Liu et al., Experimental Investigation and Thermodynamic Modeling of the Nd-Zr and the Mg-Nd-Zr Systems, Metall Mater Trans A 45, 2708-2718 (2014). doi:10.1007/s11661-014-2209-1

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}
}