Al–Hf–Ni system

22 accepted literature values from 2 paper(s) (experimental 5, model 17); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	5
model	17

Accepted values by property group
Property group	Values
invariant reaction	9
phase equilibrium	5
formation	8

Invariant reactions (literature)

Invariant reactions reported in the literature for the Al–Hf–Ni system (9)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1390	eutectic: L/Ni2AlHf + Ni64Al20Hf16	L: Hf 0.18, Ni 0.61	model	[1] Kaufman 1975	Table IX, p. 10, row 1 report
1330	eutectic: L/Ni3Al + Ni64Al20Hf16	L: Hf 0.1, Ni 0.68	model	[1] Kaufman 1975	Table IX, p. 10, row 2 report
1320	eutectic: L/Ni7Hf2 + Ni64Al20Hf16	L: Hf 0.18, Ni 0.68; Ni7Hf2: Hf 0.222222, Ni 0.777778	model	[1] Kaufman 1975	Table IX, p. 10, row 3 report
1300	eutectic: L/Ni2AlHf + Ni7Hf	L: Hf 0.24, Ni 0.64	model	[1] Kaufman 1975	Table IX, p. 10, row 4 report
1290	eutectic: L/Ni7Hf2 + Ni3Al	L: Hf 0.1, Ni 0.76; Ni7Hf2: Hf 0.222222, Ni 0.777778	model	[1] Kaufman 1975	Table IX, p. 10, row 5 report
1280	eutectic: L/Ni7Hf2 + fcc + Ni3Al	L: Hf 0.09, Ni 0.79; Ni7Hf2: Hf 0.222222, Ni 0.777778	model	[1] Kaufman 1975	Table IX, p. 10, row 7 report
1280	eutectic: L/Ni7Hf2 + Ni3Al + Ni64Al20Hf16	L: Hf 0.11, Ni 0.74; Ni7Hf2: Hf 0.222222, Ni 0.777778	model	[1] Kaufman 1975	Table IX, p. 10, row 8 report
1280	eutectic: L/Ni2AlHf + bcc	L: Hf 0.08, Ni 0.57	model	[1] Kaufman 1975	Table IX, p. 10, row 6 report
1260	eutectic: L/Ni2AlHf + bcc + Ni64Al20Hf16	L: Hf 0.08, Ni 0.6	model	[1] Kaufman 1975	Table IX, p. 10, row 9 report

Other properties

Phase equilibrium (5)

Phase equilibrium, Al–Hf–Ni system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	1433	γ + Ni5Hf γ: Al 0.0799, Hf 0.0114, Ni 0.9087; Ni5Hf: Al 0.0031, Hf 0.1581, Ni 0.8388	experimental	[2] Zhang 2008	Table 2, p. 4, row 2 report
Phase composition	1433	γ + γ′ γ: Al 0.137, Hf 0.0076, Ni 0.8554; γ′: Al 0.1855, Hf 0.0435, Ni 0.771	experimental	[2] Zhang 2008	Table 2, p. 4, row 1 report
Phase composition	1433	γ + γ′ + Ni7Hf2 γ: Al 0.1228, Hf 0.0114, Ni 0.8658; γ′: Al 0.1689, Hf 0.0588, Ni 0.7723; Ni7Hf2: Al 0.0037, Hf 0.2055, Ni 0.7909	experimental	[2] Zhang 2008	Table 2, p. 4, row 4 report
Phase composition	1433	γ + γ′ + Ni7Hf2 γ: Al 0.1245, Hf 0.0103, Ni 0.8652; γ′: Al 0.1693, Hf 0.0584, Ni 0.7723; Ni7Hf2: Al 0.0036, Hf 0.2042, Ni 0.7922	experimental	[2] Zhang 2008	Table 2, p. 4, row 3 report
Phase composition	1433	γ′ + Ni7Hf2 γ′: Al 0.1753, Hf 0.0667, Ni 0.758; Ni7Hf2: Al 0.0036, Hf 0.2114, Ni 0.785	experimental	[2] Zhang 2008	Table 2, p. 4, row 5 report

Formation (8)

Formation, Al–Hf–Ni system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy of formation printed: Free Energy of Formation	-73.6384 kJ/mol (basis unstated)	300	Ni2AlHf alloy: Hf 0.25, Ni 0.5	model	[1] Kaufman 1975	Table VIII, p. 10, row 6 report
Gibbs energy of formation printed: Free Energy of Formation	-67.1532 kJ/mol (basis unstated)	300	Ni64Al20Hf16 alloy: Hf 0.16, Ni 0.64	model	[1] Kaufman 1975	Table VIII, p. 10, row 6 report
Gibbs energy of formation printed: Free Energy of Formation	-75.1028 kJ/mol (basis unstated)	500	Ni2AlHf alloy: Hf 0.25, Ni 0.5	model	[1] Kaufman 1975	Table VIII, p. 10, row 5 report
Gibbs energy of formation printed: Free Energy of Formation	-67.3624 kJ/mol (basis unstated)	500	Ni64Al20Hf16 alloy: Hf 0.16, Ni 0.64	model	[1] Kaufman 1975	Table VIII, p. 10, row 5 report
Gibbs energy of formation printed: Free Energy of Formation	-74.6844 kJ/mol (basis unstated)	1000	Ni2AlHf alloy: Hf 0.25, Ni 0.5	model	[1] Kaufman 1975	Table VIII, p. 10, row 4 report
Gibbs energy of formation printed: Free Energy of Formation	-65.6888 kJ/mol (basis unstated)	1000	Ni64Al20Hf16 alloy: Hf 0.16, Ni 0.64	model	[1] Kaufman 1975	Table VIII, p. 10, row 4 report
Gibbs energy of formation printed: Free Energy of Formation	-73.4292 kJ/mol (basis unstated)	1200	Ni2AlHf alloy: Hf 0.25, Ni 0.5	model	[1] Kaufman 1975	Table VIII, p. 10, row 3 report
Gibbs energy of formation printed: Free Energy of Formation	-63.806 kJ/mol (basis unstated)	1200	Ni64Al20Hf16 alloy: Hf 0.16, Ni 0.64	model	[1] Kaufman 1975	Table VIII, p. 10, row 3 report

Sources

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

L. Kaufman, H. Nesor, Calculation of the Ni-Al-W, Ni-Al-Hf and Ni-Cr-Hf systems, Canadian Metallurgical Quarterly 14, 221-232 (1975). doi:10.1179/000844375795050157
C. Zhang, J. Zhu, Y. Yang, H.-B. Cao, F. Zhang, W.-S. Cao et al., Thermodynamic modeling and experimental investigation of the Ni-rich corner of the Ni–Al–Hf system, Intermetallics 16, 139-147 (2008). doi:10.1016/j.intermet.2007.08.009

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}
}