Ca–Ti system

4 accepted literature values from 1 paper(s) (model 4); 1 calculated phase diagram(s). 8 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 (4) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
model	4

Accepted values by property group
Property group	Values
invariant reaction	4

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
CaTi-15Ham.tdb	M. Hampl, R. Schmid-Fetzer, J. Mater. Sci., 50, 5822-32(2015). doi:10.1007/s10853-015-9130-x	`3a0af4e503124843d15f19ba39b9f2bb731c172b26a29ec11c19db18c0c00436`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CaTi-15Ham.tdb	1938.56	LIQUID (x(Ti) 0.00423) + LIQUID#2 (x(Ti) 0.99577) + BCC_A2 (x(Ti) 0.99691)
CaTi-15Ham.tdb	1156.02	LIQUID (x(Ti) 3.200e-4) + HCP_A3 (x(Ti) 0.99953) + BCC_A2 (x(Ti) 0.99992)
CaTi-15Ham.tdb	1114.76	BCC_A2 (x(Ti) 6.000e-5) + LIQUID (x(Ti) 2.600e-4) + HCP_A3 (x(Ti) 0.99963)
CaTi-15Ham.tdb	716.03	BCC_A2 (x(Ti) 0) + FCC_A1 (x(Ti) 0) + HCP_A3 (x(Ti) 0.99999)
CaTi-15Ham.tdb	716.03	FCC_A1 (x(Ti) 0) + BCC_A2 (x(Ti) 0) + HCP_A3 (x(Ti) 0.99999)
CaTi-15Ham.tdb	716.03	FCC_A1 (x(Ti) 0) + BCC_A2 (x(Ti) 0) + HCP_A3 (x(Ti) 0.99999)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ca–Ti system (4)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1938.15	L'' = L' + βTi	L'': Ti 0.99577; L': Ti 0.00423; βTi: Ti 0.99691	model	[1] Hampl 2015	Table 3, p. 5, row 1 report
1156.15	L' + βTi = αTi	L': Ti 3.200e-4; βTi: Ti 0.99992	model	[1] Hampl 2015	Table 3, p. 5, row 2 report
1115.15	L' = βCa + αTi	L': Ti 2.600e-4; βCa: Ti 6.000e-5; αTi: Ti 0.99963	model	[1] Hampl 2015	Table 3, p. 5, row 3 report
716.15	eutectic: βCa = αCa (+αTi)	αTi: Ti 0.99999	model	[1] Hampl 2015	Table 3, p. 5, row 4 report

Sources

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

Milan Hampl, Rainer Schmid-Fetzer, Experimental investigation and thermodynamic assessment of the Al–Ca–Ti system, J Mater Sci 50, 5822-5832 (2015). doi:10.1007/s10853-015-9130-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}
}