B–Nb–Ti system

52 accepted literature values from 1 paper(s) (experimental 5, model 18, DFT 29); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	5
model	18
DFT	29

Accepted values by property group
Property group	Values
invariant reaction	15
formation	37

Invariant reactions (literature)

Invariant reactions reported in the literature for the B–Nb–Ti system (15)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
3070	quasi-peritectic: L + Nb5B6 -> Nb3B4 + NbB	L: B 0.502, Ti 0.108	model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 5, p. 10, row 2 report
3068	quasi-peritectic: L + Nb5B6 -> Nb3B4 + NbB	L: B 0.53	experimental	[1] Nakama 2009 cites Borisov 2007 doi	Table 5, p. 10, row 3 report
3068	quasi-peritectic: L + Nb5B6 -> Nb3B4 + NbB	L: B 0.479, Ti 0.161	model	[1] Nakama 2009	Table 5, p. 10, row 1 report
2978	quasi-peritectic: L + Nb3B4 -> (Nb,Ti)B2 + NbB	L: B 0.468, Ti 0.242	model	[1] Nakama 2009	Table 5, p. 10, row 4 report
2966	quasi-peritectic: L + Nb3B4 -> (Nb,Ti)B2 + NbB	L: B 0.478, Ti 0.19	model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 5, p. 10, row 5 report
2965	quasi-peritectic: L + Nb3B4 -> (Nb,Ti)B2 + NbB	L: B 0.53, Ti 0.11	experimental	[1] Nakama 2009 cites Borisov 2007 doi	Table 5, p. 10, row 6 report
2923	peritectic: L + (Nb,Ti)B2 + NbB -> TiB	L: B 0.42, Ti 0.33	experimental	[1] Nakama 2009 cites Borisov 2007 doi	Table 5, p. 10, row 9 report
2920	peritectic: L + (Nb,Ti)B2 + NbB -> TiB	L: B 0.453, Ti 0.281	model	[1] Nakama 2009	Table 5, p. 10, row 7 report
2920	peritectic: L + (Nb,Ti)B2 + NbB -> TiB	L: B 0.464, Ti 0.22	model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 5, p. 10, row 8 report
2683	peritectic: L + (Nb,Ti)B2 + TiB -> Ti3B4	L: B 0.41, Ti 0.52	experimental	[1] Nakama 2009 cites Borisov 2007 doi	Table 5, p. 10, row 12 report
2683	peritectic: L + (Nb,Ti)B2 + TiB -> Ti3B4	L: B 0.399, Ti 0.354	model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 5, p. 10, row 11 report
2464	peritectic: L + (Nb,Ti)B2 + TiB -> Ti3B4	L: B 0.375, Ti 0.621	model	[1] Nakama 2009	Table 5, p. 10, row 10 report
2063	quasi-peritectic: L + NbB -> TiB + α	L: B 0.13, Ti 0.39	experimental	[1] Nakama 2009 cites Borisov 2007 doi	Table 5, p. 10, row 15 report
2063	quasi-peritectic: L + NbB -> TiB + α	L: B 0.149, Ti 0.496	model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 5, p. 10, row 14 report
2061	quasi-peritectic: L + NbB -> TiB + α	L: B 0.161, Ti 0.395	model	[1] Nakama 2009	Table 5, p. 10, row 13 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, B–Nb–Ti system (37)
Phase	Value	T (K)	Class	Source	Location
(Nb,Ti)3B2	-74.5 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 2 report
(Nb,Ti)3B2	-66.8 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 5 report
(Nb,Ti)3B2	-66.7 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 6 report
(Nb,Ti)3B2	-66.6 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 4 report
(Nb,Ti)3B2	-65.8 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 3 report
(Nb,Ti)3B2	-65.7 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 7 report
(Nb,Ti)3B2	-64.5 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 8 report
(Nb,Ti)3B2	-64.4 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 1 report
(Nb,Ti)3B2	-62.7 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 9 report
(Nb,Ti)3B2	-60 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 11 report
(Nb,Ti)3B2	-57.8 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 10 report
(Nb,Ti)3B4	-94.3 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 47 report
(Nb,Ti)3B4	-92.5 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 45 report
(Nb,Ti)3B4	-90.8 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 44 report
(Nb,Ti)3B4	-90.6 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 43 report
(Nb,Ti)3B4	-88.7 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 42 report
(Nb,Ti)3B4	-85.5 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 46 report
(Nb,Ti)3B4	-81.7 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 40 report
(Nb,Ti)3B4	-78.8 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 39 report
(Nb,Ti)5B6	-89 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 37 report
(Nb,Ti)5B6	-88.8 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 36 report
(Nb,Ti)5B6	-88.2 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 35 report
(Nb,Ti)5B6	-86.2 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 34 report
(Nb,Ti)5B6	-84.9 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 33 report
(Nb,Ti)5B6	-82.2 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 32 report
(Nb,Ti)5B6	-80.6 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 31 report
(Nb,Ti)5B6	-78.7 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 30 report
(Nb,Ti)5B6	2.3 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 38 report
(Nb,Ti)B2	-109.7 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 56 report
(Nb,Ti)B2	-105.2 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 55 report
(Nb,Ti)B2	-101.1 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 54 report
(Nb,Ti)B2	-96.2 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 53 report
(Nb,Ti)B2	-90.9 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 52 report
(Nb,Ti)B2	-85.3 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 51 report
(Nb,Ti)B2	-84.4 kJ/mol-atom		model	[1] Nakama 2009 cites Witusiewicz 2008 doi	Table 4, p. 7, row 49 report
(Nb,Ti)B2	-80.1 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 50 report
(Nb,Ti)B2	-72.7 kJ/mol-atom	0	DFT	[1] Nakama 2009	Table 4, p. 7, row 48 report

Sources

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

Yu Nakama, Hiroshi Ohtani, Mitsuhiro Hasebe, Thermodynamic Analysis of the Nb&ndash;Ti&ndash;B Ternary Phase Diagram, Mater. Trans. 50, 984-993 (2009). doi:10.2320/matertrans.mc200820

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}
}