# B–Cu system > B–Cu system: 14 accepted literature values (phase equilibrium 7, invariant reaction 7) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote. HTML: https://data.orchid-project.org/systems/B-CU.html · Markdown: https://data.orchid-project.org/systems/B-CU.md 14 accepted literature values from 2 paper(s) (experimental 13, model 1); 0 calculated phase diagram(s). 7 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV. Data: [JSON](https://data.orchid-project.org/literature/systems/B-CU.json) · [CSV](https://data.orchid-project.org/systems/B-CU.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#B-CU) · [phases (5)](https://data.orchid-project.org/phases/pages/B-CU.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/B-CU.html) · [Markdown](https://data.orchid-project.org/systems/B-CU.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | experimental | 13 | | model | 1 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 7 | | phase equilibrium | 7 | Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/B/B-CU.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/B/B-CU.json) · [CALPHAD hull CuB-09Zha](https://data.orchid-project.org/hulls/calphad-sgte/B/B-CU--CuB-09Zha.json) ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the B–Cu system (7) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 1333.15 | eutectic: L -> (Cu) + (B) | L: B 0.107 | experimental | [1] Wang 2009; _cites Lihl 1954_ | Table 3, p. 4, row 1; `ORC-QJPFZMQKBZ` | | | 1294.15 | eutectic: L -> (Cu) + (B) | L: B 0.107; (Cu): B 0.0029 | experimental | [1] Wang 2009; _cites Smiryagin 1965_ | Table 3, p. 4, row 2; `ORC-YTIGY5HRZD` | | | 1286.15 | eutectic: L ↔ (Cu) + (B) | | experimental | [1] Wang 2009; _cites Rexer 1970_ | p. 2; `ORC-B7LNQZSYY2` | “Rexer and Petzow \[18\] reported the composition (13.3 at.% B) and the temperature (1013 ◦ C) of the eutectic reaction L ↔ (Cu) + (B).” | | 1286.15 | eutectic: L -> (Cu) + (B) | L: B 0.133 | experimental | [1] Wang 2009; _cites Rexer 1970_ | Table 3, p. 4, row 4; `ORC-FEPXWDW2UG` | | | 1286.15 | eutectic: L -> (Cu) + (B) | L: B 0.133; (Cu): B 0.0029; (B): B 0.97 | model | [1] Wang 2009 | Table 3, p. 4, row 6; `ORC-ILS5RFJWM5` | | | 1283.15 | eutectic: L -> (Cu) + (B) | | experimental | [1] Wang 2009; _cites Piton 1974_ | Table 3, p. 4, row 5; `ORC-4BXDQV6QVT` | | | 1281.15 | eutectic: L -> (Cu) + (B) | (B): B 0.97 | experimental | [1] Wang 2009; _cites Wald 1965_ [doi](https://doi.org/10.1016/0022-5088%2865%2990126-8) | Table 3, p. 4, row 3; `ORC-JTSK44OGT3` | | ## Other properties ### Phase equilibrium (7) Table: Phase equilibrium, B–Cu system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Phase assemblage | | 1123.15 | (Cu) + (B); _alloy: B 0.344, Cu 0.656_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 20; `ORC-5UFL7EQCR3` | | | Phase assemblage | | 1123.15 | (Cu) + (B); _alloy: B 0.1757, Cu 0.8243_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 15; `ORC-K55DNTVD25` | | | Phase assemblage | | 1123.15 | (Cu) + (B); _alloy: B 0.3893, Cu 0.6107_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 23; `ORC-LIZZ2YXRFP` | | | Phase assemblage | | 1123.15 | (Cu) + (B); _alloy: B 0.0983, Cu 0.9017_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 10; `ORC-M3JPWYV4CB` | | | Phase assemblage | | 1123.15 | (Cu) + (B); _alloy: B 0.0518, Cu 0.9482_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 1; `ORC-MS6P3ELFQ7` | | | Phase assemblage | | 1123.15 | (Cu) + (B); _alloy: B 0.0796, Cu 0.9204_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 5; `ORC-YHNJVXN7VD` | | | Phase assemblage | | 1273.15 | (Cu) + (B); _alloy: B 0.35, Cu 0.65_ | experimental | [2] Zhang 2009 | Table 2, p. 3, row 19; `ORC-FZUZZ55DKD` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. C.P. Wang, S.H. Guo, A.T. Tang, F.S. Pan, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–B and Cu–Tm systems, Journal of Alloys and Compounds 482, 67-72 (2009). [doi:10.1016/j.jallcom.2009.03.101](https://doi.org/10.1016/j.jallcom.2009.03.101) 2. Wei-Wei Zhang, Yong Du, Honghui Xu, Wei Xiong, Yi Kong, Weihua Sun et al., Thermodynamic Assessment of the Cu-B System Supported by Key Experiment and First-Principles Calculations, J. Phase Equilib. Diffus. 30, 480-486 (2009). [doi:10.1007/s11669-009-9561-7](https://doi.org/10.1007/s11669-009-9561-7) ## 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). https://doi.org/10.5281/zenodo.23735569 - R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/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). https://doi.org/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); 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); 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. 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. ```bibtex @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_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} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).