Al–Sc–Y system

111 accepted literature values from 1 paper(s) (experimental 48, model 58, unspecified 5); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	48
model	58
unspecified	5

Accepted values by property group
Property group	Values
invariant reaction	83
phase transition	8
phase equilibrium	20

Invariant reactions (literature)

Invariant reactions reported in the literature for the Al–Sc–Y system (83)
T (K)	Reaction / phases	Class	Source	Location
1629	Liquid + AlY/Liquid + AlY + Al2Y	model	[1] Hu 2018	Table 5, p. 6, row 58 report
1628	Liquid + Al2Sc/Liquid + Al2Sc + Al2Y	model	[1] Hu 2018	Table 5, p. 6, row 34 report
1628	Liquid + Al2Y/Liquid + Al2Y + Al2Sc	model	[1] Hu 2018	Table 5, p. 6, row 49 report
1626	Liquid + AlY + Al2Y/AlY + Al2Y	model	[1] Hu 2018	Table 5, p. 6, row 60 report
1616	Liquid + Al2Sc/Liquid + Al2Sc + Al2Y	experimental	[1] Hu 2018	Table 5, p. 6, row 33 report
1601	Liquid + AlY + Al2Y/AlY + Al2Y	experimental	[1] Hu 2018	Table 5, p. 6, row 59 report
1579	Liquid + Al2Y/Liquid + Al2Y + AlY	model	[1] Hu 2018	Table 5, p. 6, row 45 report
1567	quasi-peritectic: Liquid + Al2Sc -> Al2Y + AlSc	model	[1] Hu 2018	Table 8, p. 11, row 1 report
1567	Liquid + Al2Y + Al2Sc/Al2Y + Al2Sc + AlSc	model	[1] Hu 2018	Table 5, p. 6, row 51 report
1566	Liquid -> AlSc + Al2Y + AlY	model	[1] Hu 2018	Table 5, p. 6, row 46 report
1566	eutectic: Liquid -> Al2Y + AlSc + AlY	model	[1] Hu 2018	Table 8, p. 11, row 2 report
1562	Al2Y + Al2Sc + AlSc/Al2Y + AlSc	model	[1] Hu 2018	Table 5, p. 6, row 52 report
1543	Liquid + Al2Y/Liquid + Al2Sc + Al2Y	model	[1] Hu 2018	Table 5, p. 6, row 1 report
1540	quasi-peritectic: Liquid + Al2Sc -> τ1 + Al3Sc	model	[1] Hu 2018	Table 8, p. 11, row 4 report
1540	Liquid + Al2Sc + Al2Y -> τ1	model	[1] Hu 2018	Table 5, p. 6, row 36 report
1540	peritectic: Liquid + Al2Sc + Al2Y -> τ1	model	[1] Hu 2018	Table 8, p. 11, row 3 report
1539	Liquid + Al2Y + Al2Sc/Al2Y + Al2Sc + AlSc	experimental	[1] Hu 2018	Table 5, p. 6, row 50 report
1532	Liquid + Al2Y + τ1/Liquid + τ1	model	[1] Hu 2018	Table 5, p. 6, row 4 report
1522	Al2Sc + τ1 -> Al3Sc + Al2Y	model	[1] Hu 2018	Table 5, p. 6, row 37 report
1511	Liquid + Al2Sc + Al2Y -> τ1	experimental	[1] Hu 2018	Table 5, p. 6, row 35 report
1479	Liquid + Al2Y/Liquid + Al2Y + τ1	model	[1] Hu 2018	Table 5, p. 6, row 26 report
1477	Liquid + Al2Y + τ1/Liquid + τ1	experimental	[1] Hu 2018	Table 5, p. 6, row 3 report
1474	Liquid + Al2Y/Liquid + Al2Y + τ1	model	[1] Hu 2018	Table 5, p. 6, row 10 report
1470	Liquid + AlY/Liquid + AlY + Al3Y5	model	[1] Hu 2018	Table 5, p. 6, row 64 report
1468	Liquid + τ1/Liquid + Al3Sc + τ1	model	[1] Hu 2018	Table 5, p. 6, row 6 report
1462	Liquid + AlY/Liquid + AlY + Al3Y5	model	[1] Hu 2018	Table 5, p. 6, row 69 report
1448	Liquid + Al2Y/Liquid + Al2Y + τ1	experimental	[1] Hu 2018	Table 5, p. 6, row 25 report
1433	Liquid + AlY + Al3Y5/AlY + Al3Y5	model	[1] Hu 2018	Table 5, p. 6, row 66 report
1432	Liquid + AlY + Al3Y5/AlY + Al3Y5 + Al2Y3	model	[1] Hu 2018	Table 5, p. 6, row 71 report
1432	peritectic: Liquid + AlY + Al3Y5 -> Al2Y3	model	[1] Hu 2018	Table 8, p. 11, row 5 report
1428	Liquid + Al2Y/Liquid + Al2Y + τ1	experimental	[1] Hu 2018	Table 5, p. 6, row 9 report
1404	quasi-peritectic: Liquid + AlY -> AlSc + Al3Y5	model	[1] Hu 2018	Table 8, p. 11, row 6 report
1384	Liquid + τ1/Liquid + Al3Sc + τ1	experimental	[1] Hu 2018	Table 5, p. 6, row 5 report
1372	quasi-peritectic: Liquid + AlSc -> Al3Y5 + AlSc2	model	[1] Hu 2018	Table 8, p. 11, row 7 report
1352	Al2Y + AlSc/Al2Y + AlSc + AlY	model	[1] Hu 2018	Table 5, p. 6, row 55 report
1345	Al2Y + AlSc/Al2Y + AlSc + AlY	experimental	[1] Hu 2018	Table 5, p. 6, row 54 report
1304	Liquid + AlY + Al3Y5/AlY + Al3Y5 + Al2Y3	experimental	[1] Hu 2018	Table 5, p. 6, row 70 report
1276	Liquid + AlY + Al3Y5/AlY + Al3Y5	experimental	[1] Hu 2018	Table 5, p. 6, row 65 report
1274	Liquid + Al2Y/Liquid + Al2Y + βAl3Y	experimental	[1] Hu 2018	Table 5, p. 6, row 39 report
1269	quasi-peritectic: Liquid + bcc_A2 -> hcp_A3 + AlSc2	model	[1] Hu 2018	Table 8, p. 11, row 8 report
1261	peritectic: Liquid + Al3Y5 + Al2Y3 -> AlY2	model	[1] Hu 2018	Table 8, p. 11, row 9 report
1242	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 6, row 78 report
1241	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 98 report
1240	Liquid + Al3Y5 + hcp_A3/Al3Y5 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 99 report
1237	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 87 report
1235	Liquid + Al3Y5 + hcp_A3/Al3Y5 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 89 report
1230	quasi-peritectic: Liquid + Al3Y5 -> AlY2 + hcp_A3	model	[1] Hu 2018	Table 8, p. 11, row 10 report
1225	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 6, row 97 report
1207	Al3Y5 + hcp_A3/Al3Y5 + hcp_A3 + AlY2	model	[1] Hu 2018	Table 5, p. 6, row 91 report
1191	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 6, row 86 report
1182	Al3Y5 + hcp_A3/Al3Y5 + AlY2 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 101 report
1180	Liquid + Al3Y5 + hcp_A3/Al3Y5 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 6, row 80 report
1170	Al3Y5 + hcp_A3/Al3Y5 + AlY2 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 6, row 100 report
1162	Liquid + Al3Y5 + hcp_A3/Al3Y5 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 6, row 88 report
1160	Al3Y5 + hcp_A3 + AlY2/AlY2 + Al3Y5	model	[1] Hu 2018	Table 5, p. 6, row 92 report
1154	Al3Y5 + hcp_A3/Al3Y5 + hcp_A3 + AlY2	experimental	[1] Hu 2018	Table 5, p. 6, row 90 report
1150	Liquid + Al2Y/Liquid + Al2Y + βAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 17 report
1147	Liquid + Al2Y/Liquid + Al2Y + βAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 40 report
1146	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 79 report
1141	Al3Y5 + AlY2 + hcp_A3/AlY2 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 102 report
1131	Liquid + Al2Y -> τ1 + βAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 19 report
1131	quasi-peritectic: Liquid + Al2Y -> τ1 + βAl3Y	model	[1] Hu 2018	Table 8, p. 11, row 11 report
1101	Liquid + Al2Y -> τ1 + βAl3Y	experimental	[1] Hu 2018	Table 5, p. 6, row 18 report
1098	Liquid + Al2Y -> τ1 + βAl3Y	experimental	[1] Hu 2018	Table 5, p. 6, row 11 report
1093	Liquid + Al2Y -> τ1 + βAl3Y	experimental	[1] Hu 2018	Table 5, p. 6, row 28 report
1093	Liquid + Al3Y5 + hcp_A3/Al3Y5 + hcp_A3	model	[1] Hu 2018	Table 5, p. 6, row 81 report
1086	eutectic: Liquid -> Al3Y5 + hcp_A3 + AlSc2	model	[1] Hu 2018	Table 8, p. 11, row 12 report
1058	Al3Y5 + hcp_A3/Al3Y5 + hcp_A3 + AlY2	model	[1] Hu 2018	Table 5, p. 6, row 82 report
1057	Al3Y5 + hcp_A3 + AlY2/hcp_A3 + AlY2	model	[1] Hu 2018	Table 5, p. 6, row 83 report
1025	τ1 + Al2Y + βAl3Y/Al2Y + βAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 42 report
974	Liquid + τ1 + βAl3Y -> αAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 20 report
974	peritectic: Liquid + τ1 + βAl3Y -> αAl3Y	model	[1] Hu 2018	Table 8, p. 11, row 13 report
973	Liquid + αAl3Y + βAl3Y/Liquid + αAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 21 report
931	Liquid + Al3Sc -> fcc_A1 + τ1	model	[1] Hu 2018	Table 5, p. 6, row 8 report
931	quasi-peritectic: Liquid + Al3Sc -> τ1 + fcc_A1	model	[1] Hu 2018	Table 8, p. 11, row 14 report
914	Liquid + τ1 -> αAl3Y + fcc_A1	model	[1] Hu 2018	Table 5, p. 6, row 15 report
914	Liquid + αAl3Y/Liquid + fcc_A1 + αAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 22 report
914	quasi-peritectic: Liquid + τ1 -> αAl3Y + fcc_A1	model	[1] Hu 2018	Table 8, p. 11, row 15 report
913	Liquid + fcc_A1 + αAl3Y/fcc_A1 + αAl3Y	experimental	[1] Hu 2018	Table 5, p. 6, row 23 report
913	Liquid + fcc_A1 + αAl3Y/fcc_A1 + αAl3Y	model	[1] Hu 2018	Table 5, p. 6, row 24 report
912	Liquid + Al3Sc -> fcc_A1 + τ1	experimental	[1] Hu 2018	Table 5, p. 6, row 7 report
911	Liquid + τ1 -> αAl3Y + fcc_A1	experimental	[1] Hu 2018	Table 5, p. 6, row 14 report
882	Al2Y + Al3Sc + Al2Sc/Al2Y + Al3Sc	model	[1] Hu 2018	Table 5, p. 6, row 38 report

Other properties

Phase transition (8)

Phase transition, Al–Sc–Y system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1127 K	1127	Al3Y5 + AlY2 + hcp_A3/AlY2 + hcp_A3	unspecified	[1] Hu 2018	Table 5, p. 7, row 8 report
Phase transition	1150 K	1150	Al3Y5 + hcp_A3/Al3Y5 + AlY2 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 7, row 6 report
Phase transition	1158 K	1158	Al3Y5 + hcp_A3/Al3Y5 + AlY2 + hcp_A3	unspecified	[1] Hu 2018	Table 5, p. 7, row 7 report
Phase transition	1183 K	1183	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	experimental	[1] Hu 2018	Table 5, p. 7, row 3 report
Phase transition	1197 K	1197	Liquid/Liquid + Al3Y5	experimental	[1] Hu 2018	Table 5, p. 7, row 1 report
Phase transition	1242 K	1242	Liquid + Al3Y5 + hcp_A3/Al3Y5 + hcp_A3	unspecified	[1] Hu 2018	Table 5, p. 7, row 5 report
Phase transition	1242 K	1242	Liquid + Al3Y5/Liquid + Al3Y5 + hcp_A3	unspecified	[1] Hu 2018	Table 5, p. 7, row 4 report
Phase transition	1255 K	1255	Liquid/Liquid + Al3Y5	unspecified	[1] Hu 2018	Table 5, p. 7, row 2 report

Phase equilibrium (20)

Phase equilibrium, Al–Sc–Y system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	298.15	Al2Y + AlSc Al2Y: Al 0.666, Sc 0.148, Y 0.186; AlSc: Al 0.505, Sc 0.405, Y 0.09	experimental	[1] Hu 2018	Table 4, p. 3, row 9 report
Phase composition	298.15	Al2Y + AlSc Al2Y: Al 0.65, Sc 0.151, Y 0.199; AlSc: Al 0.493, Sc 0.384, Y 0.123	experimental	[1] Hu 2018	Table 4, p. 3, row 11 report
Phase composition	298.15	Al2Y + AlY Al2Y: Al 0.655, Sc 0.091, Y 0.254; AlY: Al 0.495, Sc 0.16, Y 0.345	experimental	[1] Hu 2018	Table 4, p. 3, row 12 report
Phase composition	298.15	Al2Y + AlY Al2Y: Al 0.65, Sc 0.033, Y 0.317; AlY: Al 0.495, Sc 0.11, Y 0.395	experimental	[1] Hu 2018	Table 4, p. 3, row 10 report
Phase composition	298.15	Al2Y + AlY Al2Y: Al 0.654, Sc 0.072, Y 0.274; AlY: Al 0.496, Sc 0.141, Y 0.363	experimental	[1] Hu 2018	Table 4, p. 3, row 13 report
Phase composition	298.15	Al2Y3 + Al3Y5 Al2Y3: Al 0.397, Sc 0.14, Y 0.463; Al3Y5: Al 0.386, Sc 0.054, Y 0.56	experimental	[1] Hu 2018	Table 4, p. 3, row 16 report
Phase composition	298.15	Al3Sc + Al2Sc + Al2Y Al3Sc: Al 0.753, Sc 0.211, Y 0.036; Al2Sc: Al 0.67, Sc 0.268, Y 0.062; Al2Y: Al 0.673, Sc 0.195, Y 0.132	experimental	[1] Hu 2018	Table 4, p. 3, row 5 report
Phase composition	298.15	Al3Sc + τ1 + Al2Y Al3Sc: Al 0.761, Sc 0.201, Y 0.038; τ1: Al 0.754, Sc 0.167, Y 0.079; Al2Y: Al 0.674, Sc 0.199, Y 0.127	experimental	[1] Hu 2018	Table 4, p. 3, row 6 report
Phase composition	298.15	Al3Y5 + AlY2 Al3Y5: Al 0.365, Sc 0.105, Y 0.53; AlY2: Al 0.322, Sc 0.076, Y 0.602	experimental	[1] Hu 2018	Table 4, p. 3, row 18 report
Phase composition	298.15	AlY + Al3Y5 AlY: Al 0.491, Sc 0.205, Y 0.304; Al3Y5: Al 0.378, Sc 0.247, Y 0.375	experimental	[1] Hu 2018	Table 4, p. 3, row 14 report
Phase composition	298.15	AlY + Al3Y5 AlY: Al 0.49, Sc 0.164, Y 0.346; Al3Y5: Al 0.373, Sc 0.213, Y 0.414	experimental	[1] Hu 2018	Table 4, p. 3, row 15 report
Phase composition	298.15	AlY2 + hcp_(Sc,Y) AlY2: Al 0.333, Sc 0.237, Y 0.43; hcp_(Sc,Y): Al 0.052, Sc 0.344, Y 0.604	experimental	[1] Hu 2018	Table 4, p. 3, row 17 report
Phase composition	298.15	AlY2 + hcp_Y AlY2: Al 0.323, Sc 0.085, Y 0.592; hcp_Y: Al 0.028, Sc 0.031, Y 0.941	experimental	[1] Hu 2018	Table 4, p. 3, row 20 report
Phase composition	298.15	AlY2 + hcp_Y AlY2: Al 0.322, Sc 0.072, Y 0.606; hcp_Y: Al 0.054, Sc 0.024, Y 0.922	experimental	[1] Hu 2018	Table 4, p. 3, row 19 report
Phase composition	298.15	fcc_Al + αAl3Y fcc_Al: Al 0.993, Sc 0.004, Y 0.003; αAl3Y: Al 0.745, Sc 0.047, Y 0.208	experimental	[1] Hu 2018	Table 4, p. 3, row 3 report
Phase composition	298.15	fcc_Al + τ1 + αAl3Y fcc_Al: Al 0.994, Sc 0.005, Y 0.001; τ1: Al 0.762, Sc 0.174, Y 0.064; αAl3Y: Al 0.75, Sc 0.037, Y 0.213	experimental	[1] Hu 2018	Table 4, p. 3, row 1 report
Phase composition	298.15	fcc_Al + τ1 + αAl3Y fcc_Al: Al 0.978, Sc 0.015, Y 0.007; τ1: Al 0.76, Sc 0.167, Y 0.073; αAl3Y: Al 0.739, Sc 0.047, Y 0.214	experimental	[1] Hu 2018	Table 4, p. 3, row 2 report
Phase composition	298.15	τ1 + Al2Y τ1: Al 0.744, Sc 0.171, Y 0.085; Al2Y: Al 0.678, Sc 0.078, Y 0.244	experimental	[1] Hu 2018	Table 4, p. 3, row 7 report
Phase composition	298.15	τ1 + αAl3Y τ1: Al 0.759, Sc 0.159, Y 0.082; αAl3Y: Al 0.746, Sc 0.053, Y 0.201	experimental	[1] Hu 2018	Table 4, p. 3, row 4 report
Phase composition	298.15	τ1 + αAl3Y + Al2Y τ1: Al 0.762, Sc 0.143, Y 0.095; αAl3Y: Al 0.746, Sc 0.057, Y 0.197; Al2Y: Al 0.672, Sc 0.059, Y 0.269	experimental	[1] Hu 2018	Table 4, p. 3, row 8 report

Sources

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

J.L. Hu, H. Bo, L.B. Liu, Z.P. Jin, Thermodynamic study of the Al-Sc-Y system, Thermochimica Acta 661, 147-159 (2018). doi:10.1016/j.tca.2018.01.018

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}
}