Cr–Ru system

24 accepted literature values from 2 paper(s) (model 5, unspecified 19); 2 calculated phase diagram(s). 1 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 (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
model	5
unspecified	19

Accepted values by property group
Property group	Values
invariant reaction	24

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
CrRu-05Che-LB.tdb	P.-Y. Chevalier, E. Fischer, unpublished, 2005.	`6aaa1a7c6fe998e3f66e3fe50107e56633b727fd7d211de15ca0327413ee50a1`	viewer · TDB · JSON
CrRu-15Zhu.tdb	L.L. Zhu, H.Y. Qi, L. Jiang, Z.P. Jin, J.-C. Zhao, Intermetallics, 64, 86-95(2015). doi:10.1016/j.intermet.2015.04.011	`8548a182cf1b5ea420247891b86db51d681d793861804b9b5d49aceb05e1daa6`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CrRu-05Che-LB.tdb	1880.45	BCC_A2 (x(Ru) 0.32063) + LIQUID (x(Ru) 0.3734) + HCP_A3 (x(Ru) 0.51637)
CrRu-05Che-LB.tdb	1841.2	BCC_A2 (x(Ru) 0.31506) + CR2RU_D8B (x(Ru) 0.33333) + HCP_A3 (x(Ru) 0.51503)
CrRu-05Che-LB.tdb	1841.2	BCC_A2 (x(Ru) 0.31509) + CR2RU_D8B (x(Ru) 0.33333) + HCP_A3 (x(Ru) 0.51504)
CrRu-05Che-LB.tdb	1227.83	BCC_A2 (x(Ru) 0.21498) + CR3RU_A15 (x(Ru) 0.25) + CR2RU_D8B (x(Ru) 0.33333)
CrRu-05Che-LB.tdb	1227.83	BCC_A2 (x(Ru) 0.21496) + CR3RU_A15 (x(Ru) 0.25) + CR2RU_D8B (x(Ru) 0.33333)
CrRu-05Che-LB.tdb	1227.83	BCC_A2 (x(Ru) 0.21497) + CR3RU_A15 (x(Ru) 0.25) + CR2RU_D8B (x(Ru) 0.33333)
CrRu-05Che-LB.tdb	1106.06	CR3RU_A15 (x(Ru) 0.25) + CR2RU_D8B (x(Ru) 0.33333) + HCP_A3 (x(Ru) 0.5094)
CrRu-05Che-LB.tdb	1054.88	BCC_A2 (x(Ru) 0.1906) + CR3RU_A15 (x(Ru) 0.25) + HCP_A3 (x(Ru) 0.51009)
CrRu-15Zhu.tdb	1888.32	BCC_A2 (x(Ru) 0.31759) + LIQUID (x(Ru) 0.36836) + HCP_A3 (x(Ru) 0.46554)
CrRu-15Zhu.tdb	1852.76	BCC_A2 (x(Ru) 0.31336) + SIGMA_D8B (x(Ru) 0.34198) + HCP_A3 (x(Ru) 0.47013)
CrRu-15Zhu.tdb	1272.95	BCC_A2 (x(Ru) 0.22275) + CR3RU_A15 (x(Ru) 0.315) + SIGMA_D8B (x(Ru) 0.31976)
CrRu-15Zhu.tdb	1272.95	BCC_A2 (x(Ru) 0.22273) + CR3RU_A15 (x(Ru) 0.315) + SIGMA_D8B (x(Ru) 0.31976)
CrRu-15Zhu.tdb	1072.87	CR3RU_A15 (x(Ru) 0.315) + SIGMA_D8B (x(Ru) 0.34118) + HCP_A3 (x(Ru) 0.59439)
CrRu-15Zhu.tdb	1072.87	CR3RU_A15 (x(Ru) 0.315) + SIGMA_D8B (x(Ru) 0.34117) + HCP_A3 (x(Ru) 0.59441)
CrRu-15Zhu.tdb	1022.26	BCC_A2 (x(Ru) 0.19204) + CR3RU_A15 (x(Ru) 0.315) + HCP_A3 (x(Ru) 0.60074)
CrRu-15Zhu.tdb	1022.26	BCC_A2 (x(Ru) 0.19203) + CR3RU_A15 (x(Ru) 0.315) + HCP_A3 (x(Ru) 0.60075)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CrRu-05Che-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cr–Ru system (24)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1888	eutectic: L ↔ bcc(Cr) + hcp (Ru)	L: Ru 0.368; bcc(Cr): Ru 0.317; hcp (Ru): Ru 0.466	model	[1] Zhu 2015	Table 2, p. 3, row 4 report
1884	eutectic: L ↔ bcc(Cr) + hcp (Ru)	L: Ru 0.367; bcc(Cr): Ru 0.315; hcp (Ru): Ru 0.471	unspecified	[1] Zhu 2015 cites Zhu 2008	Table 2, p. 3, row 3 report
1883	eutectic: L ↔ bcc(Cr) + hcp (Ru)	L: Ru 0.37; bcc(Cr): Ru 0.32; hcp (Ru): Ru 0.48	unspecified	[1] Zhu 2015 cites Venkatraman 1987 doi	Table 2, p. 3, row 1 report
1881	eutectic: L ↔ bcc(Cr) + hcp (Ru)	L: Ru 0.373; bcc(Cr): Ru 0.321; hcp (Ru): Ru 0.516	unspecified	[1] Zhu 2015 cites Chevalier 2007	Table 2, p. 3, row 2 report
1858	peritectoid: bcc (Cr) + hcp (Ru) ↔ σ	bcc (Cr): Ru 0.312; hcp (Ru): Ru 0.471; σ: Ru 0.347	unspecified	[1] Zhu 2015 cites Zhu 2008	Table 2, p. 3, row 6 report
1853.15	peritectoid: (Cr) + (Ru) -> Cr2Ru	(Cr): Ru 0.32; (Ru): Ru 0.48; Cr2Ru: Ru 0.33	unspecified	[2] WATSON 2006 cites ref. 3	Table 1, p. 3, row 13 report
1853	peritectoid: bcc (Cr) + hcp (Ru) ↔ σ	bcc (Cr): Ru 0.313; hcp (Ru): Ru 0.47; σ: Ru 0.342	model	[1] Zhu 2015	Table 2, p. 3, row 7 report
1853	peritectoid: bcc (Cr) + hcp (Ru) ↔ σ	bcc (Cr): Ru 0.32; hcp (Ru): Ru 0.48; σ: Ru 0.33	unspecified	[1] Zhu 2015 cites Venkatraman 1987 doi	Table 2, p. 3, row 5 report
1851.15	peritectoid: (Cr) + (Ru) -> Cr2Ru	(Cr): Ru 0.324; (Ru): Ru 0.484; Cr2Ru: Ru 0.333	unspecified	[2] WATSON 2006	Table 1, p. 3, row 14 report
1273.15	peritectoid: (Cr) + Cr2Ru -> Cr3Ru	(Cr): Ru 0.23; Cr2Ru: Ru 0.33; Cr3Ru: Ru 0.32	unspecified	[2] WATSON 2006 cites ref. 3	Table 1, p. 3, row 15 report
1273	peritectoid: bcc (Cr) + σ ↔ Cr3Ru	bcc (Cr): Ru 0.223; σ: Ru 0.32; Cr3Ru: Ru 0.315	model	[1] Zhu 2015	Table 2, p. 3, row 10 report
1273	peritectoid: bcc (Cr) + σ ↔ Cr3Ru	bcc (Cr): Ru 0.23; σ: Ru 0.32; Cr3Ru: Ru 0.315	unspecified	[1] Zhu 2015 cites Venkatraman 1987 doi	Table 2, p. 3, row 8 report
1268	peritectoid: bcc (Cr) + σ ↔ Cr3Ru	bcc (Cr): Ru 0.226; σ: Ru 0.329; Cr3Ru: Ru 0.315	unspecified	[1] Zhu 2015 cites Zhu 2008	Table 2, p. 3, row 9 report
1259.05	peritectoid: (Cr) + Cr2Ru -> Cr3Ru	(Cr): Ru 0.221; Cr2Ru: Ru 0.333; Cr3Ru: Ru 0.26	unspecified	[2] WATSON 2006	Table 1, p. 3, row 16 report
1100	eutectic: σ ↔ Cr3Ru + hcp (Ru)	σ: Ru 0.335; Cr3Ru: Ru 0.315; hcp (Ru): Ru 0.508	unspecified	[1] Zhu 2015 cites Zhu 2008	Table 2, p. 3, row 12 report
1076.85	eutectoid: Cr2Ru -> Cr3Ru + (Ru)	Cr2Ru: Ru 0.333; Cr3Ru: Ru 0.257; (Ru): Ru 0.506	unspecified	[2] WATSON 2006	Table 1, p. 3, row 18 report
1073.15	eutectoid: Cr2Ru -> Cr3Ru + (Ru)	Cr2Ru: Ru 0.33; Cr3Ru: Ru 0.32; (Ru): Ru 0.5	unspecified	[2] WATSON 2006 cites ref. 3	Table 1, p. 3, row 17 report
1073	eutectic: σ ↔ Cr3Ru + hcp (Ru)	σ: Ru 0.341; Cr3Ru: Ru 0.315; hcp (Ru): Ru 0.594	model	[1] Zhu 2015	Table 2, p. 3, row 13 report
1073	eutectic: σ ↔ Cr3Ru + hcp (Ru)	σ: Ru 0.33; Cr3Ru: Ru 0.315; hcp (Ru): Ru 0.5	unspecified	[1] Zhu 2015 cites Venkatraman 1987 doi	Table 2, p. 3, row 11 report
1053	eutectic: Cr3Ru ↔ bcc (Cr) + hcp (Ru)	Cr3Ru: Ru 0.315; bcc (Cr): Ru 0.202; hcp (Ru): Ru 0.512	unspecified	[1] Zhu 2015 cites Zhu 2008	Table 2, p. 3, row 15 report
1024.15	eutectoid: Cr3Ru -> (Cr) + (Ru)	Cr3Ru: Ru 0.256; (Cr): Ru 0.19; (Ru): Ru 0.512	unspecified	[2] WATSON 2006	Table 1, p. 3, row 20 report
1023.15	eutectoid: Cr3Ru -> (Cr) + (Ru)	Cr3Ru: Ru 0.32; (Cr): Ru 0.18; (Ru): Ru 0.51	unspecified	[2] WATSON 2006 cites ref. 3	Table 1, p. 3, row 19 report
1023	eutectic: Cr3Ru ↔ bcc (Cr) + hcp (Ru)	Cr3Ru: Ru 0.315; bcc (Cr): Ru 0.18; hcp (Ru): Ru 0.51	unspecified	[1] Zhu 2015 cites Venkatraman 1987 doi	Table 2, p. 3, row 14 report
1022	eutectic: Cr3Ru ↔ bcc (Cr) + hcp (Ru)	Cr3Ru: Ru 0.315; bcc (Cr): Ru 0.192; hcp (Ru): Ru 0.601	model	[1] Zhu 2015	Table 2, p. 3, row 16 report

Sources

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

L.L. Zhu, H.Y. Qi, L. Jiang, Z.P. Jin, J.-C. Zhao, Experimental determination of the Ni–Cr–Ru phase diagram and thermodynamic reassessments of the Cr–Ru and Ni–Cr–Ru systems, Intermetallics 64, 86-95 (2015). doi:10.1016/j.intermet.2015.04.011
A WATSON, L CORNISH, R SUSS, Development of a database for the prediction of phases in Pt-based Superalloys: Cr-Pt-Ru, Rare Metals 25, 597-607 (2006). doi:10.1016/s1001-0521(06)60106-x

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}
}