Al–W system

34 accepted literature values from 2 paper(s) (experimental 5, model 21, DFT 8); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (10) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	5
model	21
DFT	8

Accepted values by property group
Property group	Values
invariant reaction	26
formation	8

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
AlW-17Wan.tdb	P. Wang, W. Xiong, U.R. Kattner, C.E. Campbell, E.A. Lass, O.Y. Kontsevoi, G.B. Olson, Calphad, 59, 112-30(2017). doi:10.1016/j.calphad.2017.09.007	`9d538d0d3abf43477164d6396f8255ab5aaceedc8882fbfaf7783f2f95560bec`	viewer · TDB · JSON
AlW-98Sau-LB.tdb	N. Saunders, COST 507, Final report round 2, 1998	`f53367dbb2e51e09bde10f8253d677037eea475ce5d8d3f60d21f932130f4bfd`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
AlW-17Wan.tdb	1925.61	AL2W_C40 (x(W) 0.33333) + LIQUID (x(W) 0.3768) + BCC_A2 (x(W) 0.89763)
AlW-17Wan.tdb	1925.61	AL2W_C40 (x(W) 0.33333) + LIQUID (x(W) 0.37684) + BCC_A2 (x(W) 0.89766)
AlW-17Wan.tdb	1620.87	LIQUID (x(W) 0.14168) + AL4W (x(W) 0.2) + AL2W_C40 (x(W) 0.33333)
AlW-17Wan.tdb	1620.86	LIQUID (x(W) 0.14124) + AL4W (x(W) 0.2) + AL2W_C40 (x(W) 0.33333)
AlW-17Wan.tdb	1199.74	AL4W (x(W) 0.2) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.91292)
AlW-17Wan.tdb	1199.74	AL4W (x(W) 0.2) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.91297)
AlW-17Wan.tdb	1199.74	AL4W (x(W) 0.2) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.91296)
AlW-17Wan.tdb	1143.66	LIQUID (x(W) 0.00295) + AL5W (x(W) 0.16667) + AL4W (x(W) 0.2)
AlW-17Wan.tdb	1143.66	LIQUID (x(W) 0.00295) + AL5W (x(W) 0.16667) + AL4W (x(W) 0.2)
AlW-17Wan.tdb	1143.66	LIQUID (x(W) 0.00294) + AL5W (x(W) 0.16667) + AL4W (x(W) 0.2)
AlW-17Wan.tdb	970.23	LIQUID (x(W) 1.800e-4) + AL12W (x(W) 0.07692) + AL5W (x(W) 0.16667)
AlW-17Wan.tdb	970.23	LIQUID (x(W) 1.800e-4) + AL12W (x(W) 0.07692) + AL5W (x(W) 0.16667)
AlW-17Wan.tdb	933.6	LIQUID (x(W) 6.000e-5) + FCC_A1 (x(W) 2.500e-4) + AL12W (x(W) 0.07692)
AlW-98Sau-LB.tdb	1925.7	LIQUID (x(W) 0.2425) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.90138)
AlW-98Sau-LB.tdb	1925.7	LIQUID (x(W) 0.24252) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.9014)
AlW-98Sau-LB.tdb	1706.83	LIQUID (x(W) 0.18986) + AL7W3 (x(W) 0.3) + AL2W_C40 (x(W) 0.33333)
AlW-98Sau-LB.tdb	1706.83	LIQUID (x(W) 0.18989) + AL7W3 (x(W) 0.3) + AL2W_C40 (x(W) 0.33333)
AlW-98Sau-LB.tdb	1706.83	LIQUID (x(W) 0.18996) + AL7W3 (x(W) 0.3) + AL2W_C40 (x(W) 0.33333)
AlW-98Sau-LB.tdb	1648.23	LIQUID (x(W) 0.1718) + AL77W23 (x(W) 0.23) + AL7W3 (x(W) 0.3)
AlW-98Sau-LB.tdb	1648.23	LIQUID (x(W) 0.1719) + AL77W23 (x(W) 0.23) + AL7W3 (x(W) 0.3)
AlW-98Sau-LB.tdb	1648.23	LIQUID (x(W) 0.17186) + AL77W23 (x(W) 0.23) + AL7W3 (x(W) 0.3)
AlW-98Sau-LB.tdb	1604.11	LIQUID (x(W) 0.12681) + AL4W (x(W) 0.2) + AL77W23 (x(W) 0.23)
AlW-98Sau-LB.tdb	1604.11	LIQUID (x(W) 0.12685) + AL4W (x(W) 0.2) + AL77W23 (x(W) 0.23)
AlW-98Sau-LB.tdb	1604.11	LIQUID (x(W) 0.12679) + AL4W (x(W) 0.2) + AL77W23 (x(W) 0.23)
AlW-98Sau-LB.tdb	1602.6	AL7W3 (x(W) 0.3) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.84707)
AlW-98Sau-LB.tdb	1602.6	AL7W3 (x(W) 0.3) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.84709)
AlW-98Sau-LB.tdb	1602.6	AL7W3 (x(W) 0.3) + AL2W_C40 (x(W) 0.33333) + BCC_A2 (x(W) 0.84711)
AlW-98Sau-LB.tdb	1580.05	AL77W23 (x(W) 0.23) + AL7W3 (x(W) 0.3) + BCC_A2 (x(W) 0.8409)
AlW-98Sau-LB.tdb	1580.05	AL77W23 (x(W) 0.23) + AL7W3 (x(W) 0.3) + BCC_A2 (x(W) 0.84086)
AlW-98Sau-LB.tdb	1580.05	AL77W23 (x(W) 0.23) + AL7W3 (x(W) 0.3) + BCC_A2 (x(W) 0.84088)
AlW-98Sau-LB.tdb	1571.03	AL4W (x(W) 0.2) + AL77W23 (x(W) 0.23) + BCC_A2 (x(W) 0.83995)
AlW-98Sau-LB.tdb	1571.03	AL4W (x(W) 0.2) + AL77W23 (x(W) 0.23) + BCC_A2 (x(W) 0.83998)
AlW-98Sau-LB.tdb	1571.03	AL4W (x(W) 0.2) + AL77W23 (x(W) 0.23) + BCC_A2 (x(W) 0.83996)
AlW-98Sau-LB.tdb	1149.59	LIQUID (x(W) 0.00247) + AL5W (x(W) 0.16667) + AL4W (x(W) 0.2)
AlW-98Sau-LB.tdb	1149.59	LIQUID (x(W) 0.00248) + AL5W (x(W) 0.16667) + AL4W (x(W) 0.2)
AlW-98Sau-LB.tdb	1149.59	LIQUID (x(W) 0.00247) + AL5W (x(W) 0.16667) + AL4W (x(W) 0.2)
AlW-98Sau-LB.tdb	969.46	LIQUID (x(W) 2.900e-4) + AL12W (x(W) 0.07692) + AL5W (x(W) 0.16667)
AlW-98Sau-LB.tdb	969.46	LIQUID (x(W) 2.900e-4) + AL12W (x(W) 0.07692) + AL5W (x(W) 0.16667)
AlW-98Sau-LB.tdb	969.46	LIQUID (x(W) 2.900e-4) + AL12W (x(W) 0.07692) + AL5W (x(W) 0.16667)
AlW-98Sau-LB.tdb	933.59	LIQUID (x(W) 1.200e-4) + FCC_A1 (x(W) 3.000e-4) + AL12W (x(W) 0.07692)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull AlW-98Sau-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Al–W system (26)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1925.7	peritectic: Liquid + bcc-A2 -> Al2W	Liquid: W 0.243; bcc-A2: W 0.901; Al2W: W 0.333	model	[1] (ed.) 1998	Table I, p. 123, row 3 report
1925.7	Liq + (W) -> Al2W	Al2W: W 0.333333	model	[2] Wang 2017 cites ref. 17	Table 10, p. 52, row 2 report
1925.6	Liq + (W) -> Al2W	Al2W: W 0.333333	model	[2] Wang 2017	Table 10, p. 52, row 1 report
1923.2	Liq + (W) -> Al2W	Al2W: W 0.333333	experimental	[2] Wang 2017 cites ref. 63	Table 10, p. 52, row 3 report
1850.5	congruent melting: Al8W3 -> Liquid	Al8W3: W 0.273; Liquid: W 0.273	model	[1] (ed.) 1998	Table I, p. 123, row 11 report
1706.8	peritectic: Liquid + Al2W -> Al7W3	Liquid: W 0.19; Al2W: W 0.333; Al7W3: W 0.3	model	[1] (ed.) 1998	Table I, p. 123, row 2 report
1648.2	Liq + Al2W -> Al4W	Al2W: W 0.333333; Al4W: W 0.2	model	[2] Wang 2017 cites ref. 17	Table 10, p. 52, row 5 report
1648.2	peritectic: Liquid + Al7W3 -> Al77W23	Liquid: W 0.172; Al7W3: W 0.3; Al77W23: W 0.23	model	[1] (ed.) 1998	Table I, p. 123, row 4 report
1621.9	Liq + Al2W -> Al4W	Al2W: W 0.333333; Al4W: W 0.2	model	[2] Wang 2017	Table 10, p. 52, row 4 report
1617	Liq + Al2W -> Al4W	Al2W: W 0.333333; Al4W: W 0.2	experimental	[2] Wang 2017 cites ref. 63	Table 10, p. 52, row 6 report
1604.1	peritectic: Liquid + Al77W23 -> Al4W	Liquid: W 0.125; Al77W23: W 0.23; Al4W: W 0.2	model	[1] (ed.) 1998	Table I, p. 123, row 5 report
1602.6	eutectoid: Al2W -> Al7W3 + bcc-A2	Al2W: W 0.333; Al7W3: W 0.3; bcc-A2: W 0.847	model	[1] (ed.) 1998	Table I, p. 123, row 1 report
1580	eutectoid: Al77W23 + bcc-A2 -> Al7W3	Al77W23: W 0.23; bcc-A2: W 0.841; Al7W3: W 0.3	model	[1] (ed.) 1998	Table I, p. 123, row 7 report
1571	eutectoid: Al77W23 -> Al4W + bcc-A2	Al77W23: W 0.023; Al4W: W 0.2; bcc-A2: W 0.84	model	[1] (ed.) 1998	Table I, p. 123, row 6 report
1199.7	Al2W -> (W) + Al4W	Al2W: W 0.333333; Al4W: W 0.2	model	[2] Wang 2017	Table 10, p. 52, row 7 report
1149.6	peritectic: Liquid + Al4W -> Al5W	Liquid: W 0.0025; Al4W: W 0.2; Al5W: W 0.167	model	[1] (ed.) 1998	Table I, p. 123, row 8 report
1143.7	Liq + Al4W -> Al5W	Al4W: W 0.2; Al5W: W 0.166667	model	[2] Wang 2017	Table 10, p. 52, row 8 report
1143.2	Liq + Al4W -> Al5W	Al4W: W 0.2; Al5W: W 0.166667	experimental	[2] Wang 2017 cites ref. 63	Table 10, p. 52, row 9 report
970.2	Liq + Al5W -> Al12W	Al5W: W 0.166667; Al12W: W 0.0769231	model	[2] Wang 2017	Table 10, p. 52, row 10 report
970	Liq + Al5W -> Al12W	Al5W: W 0.166667; Al12W: W 0.0769231	experimental	[2] Wang 2017 cites ref. 63	Table 10, p. 52, row 12 report
969.5	Liq + Al5W -> Al12W	Al5W: W 0.166667; Al12W: W 0.0769231	model	[2] Wang 2017 cites ref. 17	Table 10, p. 52, row 11 report
969.4	peritectic: Liquid + Al5W -> Al12W	Liquid: W 3.000e-4; Al5W: W 0.167; Al12W: W 0.077	model	[1] (ed.) 1998	Table I, p. 123, row 9 report
933.6	peritectic: Liquid + Al12W -> fcc-A	Liquid: W 2.000e-4; Al12W: W 0.077; fcc-A: W 3.000e-4	model	[1] (ed.) 1998	Table I, p. 123, row 10 report
933.6	Liq + Al12W -> (Al)	Al12W: W 0.0769231	model	[2] Wang 2017 cites ref. 17	Table 10, p. 52, row 14 report
933.5	Liq + Al12W -> (Al)	Al12W: W 0.0769231	model	[2] Wang 2017	Table 10, p. 52, row 13 report
933	Liq + Al12W -> (Al)	Al12W: W 0.0769231	experimental	[2] Wang 2017 cites ref. 63	Table 10, p. 52, row 15 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, Al–W system (8)
Phase	Value	Class	Source	Location
Al12W	-7.57 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 22	Table 1, p. 36, row 13 report
Al12W	-7.53 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 21	Table 1, p. 36, row 11 report
Al12W	-7.24 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 23	Table 1, p. 36, row 12 report
Al2W	-3.09 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 23	Table 1, p. 36, row 18 report
Al4W	-14.86 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 23	Table 1, p. 36, row 17 report
Al5W	-15.82 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 22	Table 1, p. 36, row 16 report
Al5W	-15.73 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 21	Table 1, p. 36, row 14 report
Al5W	-15.44 kJ/mol-atom	DFT	[2] Wang 2017 cites ref. 23	Table 1, p. 36, row 15 report

Sources

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

I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.
Peisheng Wang, Wei Xiong, Ursula R. Kattner, Carelyn E. Campbell, Eric A. Lass, Oleg Y. Kontsevoi et al., Thermodynamic re-assessment of the Al-Co-W system, Calphad 59, 112-130 (2017). doi:10.1016/j.calphad.2017.09.007

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}
}