# C–Fe–N system

> C–Fe–N system: 34 accepted literature values (phase equilibrium 19, invariant reaction 15) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/C-FE-N.html · Markdown: https://data.orchid-project.org/systems/C-FE-N.md

34 accepted literature values from 1 paper(s) (experimental 15, model 10, unspecified 9); 0 calculated phase diagram(s).

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

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 15 |
| model | 10 |
| unspecified | 9 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 15 |
| phase equilibrium | 19 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the C–Fe–N system (15)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 952 | quasi-peritectic: U1, γ + θ ⇌ α + ε |  | model | [1] Göhring 2016; _cites Kunze 1996_ | Table IV, p. 9, row 4; `ORC-7U33MBNG5R` |  |
| 873 | quasi-peritectic: U1, γ + θ ⇌ α + ε |  | model | [1] Göhring 2016 | Table IV, p. 9, row 2; `ORC-KMDNN2Q4HA` |  |
| 868 | quasi-peritectic: U1, γ + θ ⇌ α + ε |  | experimental | [1] Göhring 2016; _cites Woehrle 2016_ [doi](https://doi.org/10.3139/146.111341) | Table IV, p. 9, row 1; `ORC-ZRKMJHH2TF` |  |
| 867 | quasi-peritectic: U1, γ + θ ⇌ α + ε |  | model | [1] Göhring 2016; _cites Du 1993_ [doi](https://doi.org/10.1007/bf02667880) | Table IV, p. 9, row 3; `ORC-L64ZVSAX5K` |  |
| 859 | eutectic: E1, γ ⇌ α + γ′ + ε |  | model | [1] Göhring 2016; _cites Du 1993_ [doi](https://doi.org/10.1007/bf02667880) | Table IV, p. 9, row 7; `ORC-EHGKGNYIE7` |  |
| 857 | eutectic: E1, γ ⇌ α + γ′ + ε |  | model | [1] Göhring 2016 | Table IV, p. 9, row 6; `ORC-ADWVL2ULR7` |  |
| 857 | eutectic: E1, γ ⇌ α + γ′ + ε |  | model | [1] Göhring 2016; _cites Kunze 1996_ | Table IV, p. 9, row 8; `ORC-DJ2NNGKXL2` |  |
| 853 | eutectic: E1, γ ⇌ α + γ′ + ε |  | experimental | [1] Göhring 2016; _cites Woehrle 2016_ [doi](https://doi.org/10.3139/146.111341) | Table IV, p. 9, row 5; `ORC-GP327YK6EY` |  |
| 842 | quasi-peritectic: U2, α + ε ⇌ γ′ + θ |  | experimental | [1] Göhring 2016; _cites Gohring 2016_ [doi](https://doi.org/10.1016/j.calphad.2015.10.014) | Table IV, p. 9, row 9; `ORC-JZMF23ZFTC` |  |
| 840 | eutectic: E2, ε ⇌ γ′ + θ |  | experimental | [1] Göhring 2016; _cites Gohring 2016_ [doi](https://doi.org/10.1016/j.calphad.2015.10.014) | Table IV, p. 9, row 12; `ORC-7K55V3XDC4` |  |
| 840 | eutectic: e4, ε ⇌ α + γ′ + θ |  | experimental | [1] Göhring 2016; _cites Gohring 2016_ [doi](https://doi.org/10.1016/j.calphad.2015.10.014) | Table IV, p. 9, row 14; `ORC-YNLH4734BZ` |  |
| 839 | quasi-peritectic: U2, α + ε ⇌ γ′ + θ |  | model | [1] Göhring 2016 | Table IV, p. 9, row 10; `ORC-GI2V2QO35E` |  |
| 833 | eutectic: E2, ε ⇌ γ′ + θ |  | model | [1] Göhring 2016; _cites Kunze 1996_ | Table IV, p. 9, row 13; `ORC-224WLVFNYB` |  |
| 825 | eutectic: e4, ε ⇌ α + γ′ + θ |  | model | [1] Göhring 2016; _cites Kunze 1996_ | Table IV, p. 9, row 15; `ORC-TA336HK62F` |  |
| 783 | quasi-peritectic: U2, α + ε ⇌ γ′ + θ |  | model | [1] Göhring 2016; _cites Du 1993_ [doi](https://doi.org/10.1007/bf02667880) | Table IV, p. 9, row 11; `ORC-SRKGAA4YQB` |  |

## Other properties

### Phase equilibrium (19)

Table: Phase equilibrium, C–Fe–N system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1323 | γ; _γ: C 0.0245, Fe 0.90031, N 0.075189_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 2; `ORC-7V7UJ6Z5IN` |  |
| Phase composition |  | 1323 | γ; _γ: C 0.024339, Fe 0.892179, N 0.083482_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 1; `ORC-C6IGKQFSST` |  |
| Phase composition |  | 1373 | γ; _γ: C 0.018886, Fe 0.898302, N 0.082812_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 3; `ORC-CKSLNVVXU7` |  |
| Phase composition |  | 1373 | γ; _γ: C 0.031972, Fe 0.890532, N 0.077496_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 5; `ORC-MXXY3EZUP6` |  |
| Phase composition |  | 1373 | γ; _γ: C 0.032237, Fe 0.900682, N 0.067081_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 6; `ORC-OTWLNY57Y7` |  |
| Phase composition |  | 1373 | γ; _γ: C 0.019001, Fe 0.905828, N 0.075171_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 4; `ORC-UTOFLXLYAV` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.032494, Fe 0.89418, N 0.073326_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 11; `ORC-3PPONYIGML` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.032719, Fe 0.902677, N 0.064604_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 14; `ORC-CM2RSO7FGS` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.021626, Fe 0.907906, N 0.070468_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 10; `ORC-GO6YYP2FQF` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.018617, Fe 0.908989, N 0.072394_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 8; `ORC-LJKKHJC4QC` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.032548, Fe 0.896208, N 0.071244_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 13; `ORC-MMUOCA34KM` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.018498, Fe 0.901083, N 0.080418_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 7; `ORC-XSLOUME4A6` |  |
| Phase composition |  | 1423 | γ; _γ: C 0.021459, Fe 0.898312, N 0.080229_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 9; `ORC-ZSRYROQSOU` |  |
| Phase composition |  | 1473 | γ; _γ: C 0.021524, Fe 0.902063, N 0.076412_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 17; `ORC-3HR6Z4AJO4` |  |
| Phase composition |  | 1473 | γ; _γ: C 0.033437, Fe 0.897455, N 0.069108_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 19; `ORC-5A62MARMDJ` |  |
| Phase composition |  | 1473 | γ; _γ: C 0.021662, Fe 0.909981, N 0.068357_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 18; `ORC-5UOHQUZODY` |  |
| Phase composition |  | 1473 | γ; _γ: C 0.019945, Fe 0.910899, N 0.069155_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 16; `ORC-JNVJM6OMI5` |  |
| Phase composition |  | 1473 | γ; _γ: C 0.033623, Fe 0.904279, N 0.062098_ | unspecified | [1] Göhring 2016 | Table V, p. 10, row 20; `ORC-RSN5MDBDBX` |  |
| Phase composition |  | 1473 | γ; _γ: C 0.019824, Fe 0.903312, N 0.076864_ | experimental | [1] Göhring 2016; _cites Schenck 1963_ | Table V, p. 10, row 15; `ORC-SEUNXTXM52` |  |

## Sources

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

1. Holger Göhring, Olga Fabrichnaya, Andreas Leineweber, Eric Jan Mittemeijer, Thermodynamics of the Fe-N and Fe-N-C Systems: The Fe-N and Fe-N-C Phase Diagrams Revisited, Metall Mater Trans A 47, 6173-6186 (2016). [doi:10.1007/s11661-016-3731-0](https://doi.org/10.1007/s11661-016-3731-0)

## 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 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); 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.

```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_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/).