# B–Ni system

> B–Ni system: 45 accepted literature values (invariant reaction 33, formation 9, phase transition 3) 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-NI.html · Markdown: https://data.orchid-project.org/systems/B-NI.md

45 accepted literature values from 2 paper(s) (experimental 13, model 32); 0 calculated phase diagram(s).

Data: [JSON](https://data.orchid-project.org/literature/systems/B-NI.json) · [CSV](https://data.orchid-project.org/systems/B-NI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#B-NI) · [phases (11)](https://data.orchid-project.org/phases/pages/B-NI.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/B-NI.html) · [Markdown](https://data.orchid-project.org/systems/B-NI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 13 |
| model | 32 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 33 |
| phase transition | 3 |
| formation | 9 |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/B/B-NI.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/B/B-NI.json) · [CALPHAD hull NiB-01Tok](https://data.orchid-project.org/hulls/calphad-sgte/B/B-NI--NiB-01Tok.json) · [CALPHAD hull NiB-03Tok](https://data.orchid-project.org/hulls/calphad-sgte/B/B-NI--NiB-03Tok.json) · [CALPHAD hull NiB-09Sun](https://data.orchid-project.org/hulls/calphad-sgte/B/B-NI--NiB-09Sun.json) · [CALPHAD hull NiB-91Pan-LB](https://data.orchid-project.org/hulls/calphad-sgte/B/B-NI--NiB-91Pan-LB.json) · [CALPHAD hull NiB-99Cam](https://data.orchid-project.org/hulls/calphad-sgte/B/B-NI--NiB-99Cam.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the B–Ni system (33)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1435.15 | congruent melting: Ni3B -> L | Ni3B: B 0.25; L: B 0.25 | model | [1] Campbell 1999 | Table 4, p. 4, row 6; `ORC-YENM52BMBL` |  |
| 1433.15 | congruent melting: Ni3B -> L | Ni3B: B 0.25; L: B 0.25 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 5; `ORC-CEFHKPXPVM` |  |
| 1429.15 | congruent melting: Ni3B -> L | Ni3B: B 0.25; L: B 0.25 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 4; `ORC-6OW6QRDH2Z` |  |
| 1398.15 | congruent melting: Ni2B -> L | Ni2B: B 0.333; L: B 0.333 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 10; `ORC-TLYVCN6HIQ` |  |
| 1392.15 | congruent melting: Ni2B -> L | Ni2B: B 0.333; L: B 0.333 | model | [1] Campbell 1999 | Table 4, p. 4, row 12; `ORC-5MYKKJK3OW` |  |
| 1388.15 | eutectic: Ni3B + Ni2B -> L | Ni3B: B 0.25; Ni2B: B 0.333; L: B 0.32 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 8; `ORC-YONX4BAZ5Y` |  |
| 1388.15 | eutectic: Ni3B + Ni2B -> L | Ni3B: B 0.25; Ni2B: B 0.333; L: B 0.316 | model | [1] Campbell 1999 | Table 4, p. 4, row 9; `ORC-YWONWQ25CE` |  |
| 1387.15 | congruent melting: Ni2B -> L | Ni2B: B 0.333; L: B 0.333 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 11; `ORC-RF6QRQBY7C` |  |
| 1384.15 | eutectic: Ni3B + Ni2B -> L | Ni3B: B 0.25; Ni2B: B 0.333; L: B 0.3 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 7; `ORC-7AQ7UYG5CU` |  |
| 1383.15 | eutectic: L -> Ni2B + Ni3B | L: Ni 0.68; Ni2B: Ni 0.667; Ni3B: Ni 0.75 | model | [2] Cacciamani 2011 | Table 2, p. 5, row 3; `ORC-ECLKLN43TZ` |  |
| 1366.15 | eutectic: Ni(γ) + Ni3B -> L | Ni(γ): B 0.003; Ni3B: B 0.25; L: B 0.17 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 1; `ORC-GQVV5RDLKV` |  |
| 1363.15 | eutectic: Ni(γ) + Ni3B -> L | Ni(γ): B 0.0029; Ni3B: B 0.25; L: B 0.159 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 2; `ORC-DJFFIDQ4JT` |  |
| 1362.15 | eutectic: Ni(γ) + Ni3B -> L | Ni(γ): B 0.00267; Ni3B: B 0.25; L: B 0.162 | model | [1] Campbell 1999 | Table 4, p. 4, row 3; `ORC-BJJ55ISHU4` |  |
| 1361.15 | eutectic: L -> Ni3B + Ni | L: Ni 0.839; Ni3B: Ni 0.75; Ni: Ni 0.999 | model | [2] Cacciamani 2011 | Table 2, p. 5, row 4; `ORC-M6YMSP62RT` |  |
| 1309.15 | peritectic: NiB -> β + L | NiB: B 0.5; β: B 1; L: B 0.485 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 29; `ORC-TRANQX6UF6` |  |
| 1308.55 | congruent melting: Ni4B3(m) -> L | Ni4B3(m): B 0.436; L: B 0.436 | model | [1] Campbell 1999 | Table 4, p. 4, row 24; `ORC-K7H4CTG4BQ` |  |
| 1308.15 | peritectic: NiB -> β + L | NiB: B 0.5; β: B 1; L: B 0.46 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 28; `ORC-LC25MN2V4W` |  |
| 1306.15 | peritectic: NiB -> β + L | NiB: B 0.5; β: B 1; L: B 0.5 | model | [1] Campbell 1999 | Table 4, p. 4, row 30; `ORC-HFOTAJUQO5` |  |
| 1306.15 | peritectic: L + B -> NiB | L: Ni 0.5; B: Ni 0; NiB: Ni 0.5 | model | [2] Cacciamani 2011 | Table 2, p. 5, row 5; `ORC-MDEBXZPSDW` |  |
| 1304.15 | congruent melting: Ni4B3(m) -> L | Ni4B3(m): B 0.436; L: B 0.436 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 22; `ORC-TSQXQFEIIB` |  |
| 1302.39 | eutectic: Ni2B + Ni4B3(o) -> L | Ni2B: B 0.333; Ni4B3(o): B 0.414; L: B 0.412 | model | [1] Campbell 1999 | Table 4, p. 4, row 15; `ORC-TPBX2DIQ5L` |  |
| 1302.36 | congruent melting: Ni4B3(o) -> L | Ni4B3(o): B 0.414; L: B 0.414 | model | [1] Campbell 1999 | Table 4, p. 4, row 18; `ORC-RDLCI7FNCN` |  |
| 1302.34 | eutectic: Ni4B3(o) + Ni4B3(m) -> L | Ni4B3(o): B 0.414; Ni4B3(m): B 0.436; L: B 0.413 | model | [1] Campbell 1999 | Table 4, p. 4, row 21; `ORC-FWOTTUITHI` |  |
| 1300.15 | congruent melting: Ni4B3(m) -> L | Ni4B3(m): B 0.436; L: B 0.436 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 23; `ORC-43V2LFLUAO` |  |
| 1300.15 | eutectic: Ni2B + Ni4B3(o) -> L | Ni2B: B 0.333; Ni4B3(o): B 0.414; L: B 0.408 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 14; `ORC-IY5ZJJZRBI` |  |
| 1300.15 | congruent melting: Ni4B3(o) -> L | Ni4B3(o): B 0.414; L: B 0.414 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 17; `ORC-NW3ZVLIKJN` |  |
| 1299.15 | congruent melting: Ni4B3(o) -> L | Ni4B3(o): B 0.414; L: B 0.414 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 16; `ORC-ZM35K3OFON` |  |
| 1298.15 | eutectic: Ni4B3(o) + Ni4B3(m) -> L | Ni4B3(o): B 0.414; Ni4B3(m): B 0.436; L: B 0.43 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 19; `ORC-7OFVLCCZ55` |  |
| 1296.15 | eutectic: Ni4B3(m) + NiB -> L | Ni4B3(m): B 0.436; NiB: B 0.5; L: B 0.468 | model | [1] Campbell 1999 | Table 4, p. 4, row 27; `ORC-BHY3JKTRXR` |  |
| 1294.15 | eutectic: Ni4B3(o) + Ni4B3(m) -> L | Ni4B3(o): B 0.414; Ni4B3(m): B 0.436; L: B 0.415 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 20; `ORC-ZNPGJGJLHP` |  |
| 1292.15 | eutectic: Ni2B + Ni4B3(o) -> L | Ni2B: B 0.333; Ni4B3(o): B 0.414; L: B 0.395 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 13; `ORC-34LUE3PDWX` |  |
| 1291.15 | eutectic: Ni4B3(m) + NiB -> L | Ni4B3(m): B 0.436; NiB: B 0.5; L: B 0.453 | experimental | [1] Campbell 1999; _cites Schobel 1965_ | Table 4, p. 4, row 25; `ORC-PHDSL7C625` |  |
| 1285.15 | eutectic: Ni4B3(m) + NiB -> L | Ni4B3(m): B 0.436; NiB: B 0.5; L: B 0.45 | model | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 4, p. 4, row 26; `ORC-TLOSLVP2WA` |  |

## 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](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, B–Ni system (9)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Ni2B |  | -27 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Campbell 1999; _cites Niessen 1983_ [doi](https://doi.org/10.1016/0364-5916%2883%2990030-5) | Table 8, p. 8, row 3; `ORC-74IZTO4MC4.917388` |  |
| Ni2B |  | -26.7 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Campbell 1999 | Table 8, p. 8, row 4; `ORC-KRHLA5G7FK.c471c8` |  |
| Ni2B |  | -22.6 kJ/mol (basis unstated) ± 1.4 | 298.15 | experimental |  |  | [1] Campbell 1999; _cites Sato 1982_ [doi](https://doi.org/10.1007/bf02664582) | Table 8, p. 8, row 1; `ORC-CPO7TFMEN4.f0ddcc` |  |
| Ni2B |  | -21.13 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 8, p. 8, row 5; `ORC-VRUTO36UVF.dada63` |  |
| NiB |  | -50.2 kJ/mol (basis unstated) ± 6.3 | 298.15 | experimental |  |  | [1] Campbell 1999; _cites Gorelkin 1972_ | Table 8, p. 8, row 2; `ORC-DOEBEZIA3M.d1e76f` |  |
| NiB |  | -33 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Campbell 1999; _cites Niessen 1983_ [doi](https://doi.org/10.1016/0364-5916%2883%2990030-5) | Table 8, p. 8, row 3; `ORC-74IZTO4MC4.49693b` |  |
| NiB |  | -25.8 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Campbell 1999 | Table 8, p. 8, row 4; `ORC-KRHLA5G7FK.277a9a` |  |
| NiB |  | -23.43 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Campbell 1999; _cites Teppo 1993_ [doi](https://doi.org/10.1179/mst.1993.9.3.205) | Table 8, p. 8, row 5; `ORC-VRUTO36UVF.bc896f` |  |
| NiB |  | -20.1 kJ/mol (basis unstated) ± 2.8 | 298.15 | experimental |  |  | [1] Campbell 1999; _cites Sato 1982_ [doi](https://doi.org/10.1007/bf02664582) | Table 8, p. 8, row 1; `ORC-CPO7TFMEN4.f7a9e0` |  |

## Other properties

### Phase transition (3)

Table: Phase transition, B–Ni system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 1298.15 K | 1298.15 | congruent melting: L -> m–Ni4B3; _L: Ni 0.565; m–Ni4B3: Ni 0.565_ | model | [2] Cacciamani 2011 | Table 2, p. 5, row 6; `ORC-GGT7WZFSTI` |  |
| Phase transition | 1385.15 K | 1385.15 | congruent melting: L -> Ni2B; _L: Ni 0.667; Ni2B: Ni 0.667_ | model | [2] Cacciamani 2011 | Table 2, p. 5, row 2; `ORC-BIX7M5LKU2` |  |
| Phase transition | 1435.15 K | 1435.15 | congruent melting: L -> Ni3B; _L: Ni 0.75; Ni3B: Ni 0.75_ | model | [2] Cacciamani 2011 | Table 2, p. 5, row 1; `ORC-FGHCOFHQR7` |  |

## Sources

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

1. C. E. Campbell, U. R. Kattner, A thermodynamic assessment of the Ni-Al-B system, JPE 20, 485-496 (1999). [doi:10.1361/105497199770340743](https://doi.org/10.1361/105497199770340743)
2. G. Cacciamani, P. Riani, F. Valenza, Equilibrium between MB2 (M=Ti,Zr,Hf) UHTC and Ni: A thermodynamic database for the B–Hf–Ni–Ti–Zr system, Calphad 35, 601-619 (2011). [doi:10.1016/j.calphad.2011.10.003](https://doi.org/10.1016/j.calphad.2011.10.003)

## 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=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).