Cr–Nb–Si system

24 accepted literature values from 1 paper(s) (experimental 1, model 2, unspecified 21); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	1
model	2
unspecified	21

Accepted values by property group
Property group	Values
invariant reaction	3
phase equilibrium	18
formation	3

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cr–Nb–Si system (3)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1473	C14 Nb(Cr,Si)2 + αNb5Si3 + CrNb4Si3	C14 Nb(Cr,Si)2: Cr 0.4326, Nb 0.3333, Si 0.2341; αNb5Si3: Cr 0.1003, Nb 0.5247, Si 0.375; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375	unspecified	[1] David 2006	Table 9, p. 10, row 2 report
1473	(Cr,Nb)6Si5 + αCr5-Si3 + (Cr,Nb)11Si8	(Cr,Nb)6Si5: Cr 0.401, Nb 0.1444, Si 0.4545; αCr5Si3: Cr 0.625, Si 0.375; (Cr,Nb)11Si8: Cr 0.4138, Nb 0.1652, Si 0.421	unspecified	[1] David 2006	Table 9, p. 10, row 3 report
1473	CrNbSi + CrNb4Si3- + C14 Nb(Cr,Si)2	CrNbSi: Cr 0.3333, Nb 0.3333, Si 0.3333; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375; C14 Nb(Cr,Si)2: Cr 0.4326, Nb 0.3333, Si 0.2341	unspecified	[1] David 2006	Table 9, p. 10, row 1 report

Other properties

Phase equilibrium (18)

Phase equilibrium, Cr–Nb–Si system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	1473	(Cr,Nb)6Si5 + (Cr,Nb)11Si8 + CrNb4Si3 (Cr,Nb)6Si5: Cr 0.2241, Nb 0.3213, Si 0.4545; (Cr,Nb)11Si8: Cr 0.2574, Nb 0.3216, Si 0.421; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375	unspecified	[1] David 2006	Table 9, p. 9, row 4 report
Phase composition	1473	(Cr,Nb)6Si5 + CrNb4Si3 + αNb5Si3 (Cr,Nb)6Si5: Cr 0.1908, Nb 0.3547, Si 0.4545; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375; αNb5Si3: Cr 0.1003, Nb 0.5245, Si 0.3752	unspecified	[1] David 2006	Table 9, p. 9, row 5 report
Phase composition	1473	(Cr,Nb)6Si5 + CrSi + CrSi2 (Cr,Nb)6Si5: Cr 0.4469, Nb 0.0985, Si 0.4545; CrSi: Cr 0.5, Nb 0, Si 0.5; CrSi2: Cr 0.3354, Nb 0, Si 0.6646	unspecified	[1] David 2006	Table 9, p. 9, row 7 report
Phase composition	1473	(Cr,Nb)6Si5 + CrSi2 + NbSi2 (Cr,Nb)6Si5: Cr 0.3357, Nb 0.2098, Si 0.4546; CrSi2: Cr 0.3264, Nb 0, Si 0.6736; NbSi2: Cr 0.005, Nb 0.3273, Si 0.6678	unspecified	[1] David 2006	Table 9, p. 9, row 6 report
Phase composition	1473	(Cr,Nb)6Si5 + αCr5Si3 + (Cr,Nb)11Si8 (Cr,Nb)6Si5: Cr 0.401, Nb 0.1444, Si 0.4545; αCr5Si3: Cr 0.625, Nb 0, Si 0.375; (Cr,Nb)11Si8: Cr 0.4138, Nb 0.1652, Si 0.421	unspecified	[1] David 2006	Table 9, p. 9, row 18 report
Phase composition	1473	(Cr,Nb)6Si5 + αNb5Si3 + NbSi2 (Cr,Nb)6Si5: Cr 0.1842, Nb 0.3613, Si 0.4545; αNb5Si3: Cr 0.0961, Nb 0.5286, Si 0.3753; NbSi2: Cr 0, Nb 0.333, Si 0.667	unspecified	[1] David 2006	Table 9, p. 9, row 3 report
Phase composition	1473	(Nb) + C14 Nb(Cr,Si)2 + αNb5Si3 (Nb): Cr 0.0189, Nb 0.9799, Si 0.0011; C14 Nb(Cr,Si)2: Cr 0.5073, Nb 0.3338, Si 0.1589; αNb5Si3: Cr 0.0717, Nb 0.5533, Si 0.375	unspecified	[1] David 2006	Table 9, p. 9, row 1 report
Phase composition	1473	C14 Nb(Cr,Si)2 + αNb5Si3 + CrNb4Si3 + CrSi αNb5Si3: Cr 0.1003, Nb 0.5247, Si 0.375; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375; CrSi: Cr 0.5, Nb 0, Si 0.5; C14 Nb(Cr,Si)2: Cr 0.4326, Nb 0.3333, Si 0.2341	unspecified	[1] David 2006	Table 9, p. 9, row 17 report
Phase composition	1473	C15 + (Nb) + C14 Nb(Cr,Si)2 C15: Cr 0.6566, Nb 0.3434, Si 0; (Nb): Cr 0.0963, Nb 0.9037, Si 0; C14 Nb(Cr,Si)2: Cr 0.6425, Nb 0.338, Si 0.0194	unspecified	[1] David 2006	Table 9, p. 9, row 15 report
Phase composition	1473	C15 NbCr2 + (Cr) + C14 Nb(Cr,Si)2 C15 NbCr2: Cr 0.6937, Nb 0.3063, Si 0; (Cr): Cr 0.9811, Nb 0.0189, Si 0; C14 Nb(Cr,Si)2: Cr 0.6454, Nb 0.3303, Si 0.0243	unspecified	[1] David 2006	Table 9, p. 9, row 14 report
Phase composition	1473	Cr3Si + (Cr) + C14 Nb(Cr,Si)2 + CrNbSi Cr3Si: Cr 0.7766, Nb 0, Si 0.2234; (Cr): Cr 0.9355, Nb 0.017, Si 0.0643; C14 Nb(Cr,Si)2: Cr 0.451, Nb 0.3333, Si 0.2157; CrNbSi: Cr 0.3333, Nb 0.3333, Si 0.3333	unspecified	[1] David 2006	Table 9, p. 9, row 13 report
Phase composition	1473	Cr3Si + (Cr,Nb)11Si8 + CrNbSi Cr3Si: Cr 0.7594, Nb 0, Si 0.2406; (Cr,Nb)11Si8: Cr 0.3361, Nb 0.2429, Si 0.421; CrNbSi: Cr 0.3333, Nb 0.3333, Si 0.3333	unspecified	[1] David 2006	Table 9, p. 9, row 10 report
Phase composition	1473	Cr3Si + CrNbSi + C14 Nb(Cr,Si)2 Cr3Si: Cr 0.7595, Nb 0, Si 0.2405; CrNbSi: Cr 0.3333, Nb 0.3333, Si 0.3333; C14 Nb(Cr,Si)2: Cr 0.4126, Nb 0.3333, Si 0.2341	unspecified	[1] David 2006	Table 9, p. 9, row 12 report
Phase composition	1473	Cr3Si + αCr5Si3 + (Cr,Nb)11Si8 Cr3Si: Cr 0.7471, Nb 0, Si 0.2529; αCr5Si3: Cr 0.625, Nb 0, Si 0.375; (Cr,Nb)11Si8: Cr 0.4135, Nb 0.1655, Si 0.421	unspecified	[1] David 2006	Table 9, p. 9, row 9 report
Phase composition	1473	CrNbSi + CrNb4Si3 + (Cr,Nb)11Si8 CrNbSi: Cr 0.3333, Nb 0.3333, Si 0.3333; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375; (Cr,Nb)11Si8: Cr 0.2828, Nb 0.2962, Si 0.421	unspecified	[1] David 2006	Table 9, p. 9, row 2 report
Phase composition	1473	CrNbSi + CrNb4Si3 + C14 Nb(Cr,Si)2 CrNbSi: Cr 0.3333, Nb 0.3333, Si 0.3333; CrNb4Si3: Cr 0.125, Nb 0.5, Si 0.375; C14 Nb(Cr,Si)2: Cr 0.4326, Nb 0.3333, Si 0.2341	unspecified	[1] David 2006	Table 9, p. 9, row 16 report
Phase composition	1473	CrSi2 + NbSi2 + (Si) CrSi2: Cr 0.3264, Nb 0, Si 0.6736; NbSi2: Cr 0.005, Nb 0.3273, Si 0.6678; (Si): Si 1	unspecified	[1] David 2006	Table 9, p. 9, row 11 report
Phase composition	1473	αCr5Si3 + (Cr,Nb)6Si5 + CrSi αCr5Si3: Cr 0.625, Nb 0, Si 0.375; (Cr,Nb)6Si5: Cr 0.451, Nb 0.0944, Si 0.4545; CrSi: Cr 0.5, Nb 0, Si 0.5	unspecified	[1] David 2006	Table 9, p. 9, row 8 report

Formation (3)

Formation, Cr–Nb–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy of formation	-74.7 kJ/mol-atom	1473	(Cr,Nb)6Si5	model	[1] David 2006 cites Shao 2005 doi	Table 10, p. 10, row 2 report
Gibbs energy of formation	-66 kJ/mol-atom	1473	(Cr,Nb)6Si5	model	[1] David 2006	Table 10, p. 10, row 3 report
Gibbs energy of formation	-68.7 kJ/mol-atom	1473	(Cr,Nb)6Si5	experimental	[1] David 2006 cites Gaillard-Allemand 1998	Table 10, p. 10, row 1 report

Sources

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

N. David, Y. Cartigny, T. Belmonte, J.M. Fiorani, M. Vilasi, Thermodynamic description of the Cr–Nb–Si isothermal section at 1473K, Intermetallics 14, 464-473 (2006). doi:10.1016/j.intermet.2005.08.013

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}
}