Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings
Abstract After the publication of “Direct formation of hard‐magnetic tetrataenite in bulk alloy castings” Ivanov et al., Advanced Science 10 (2022) 2204315, the authors identified a potential misinterpretation of the experimental data. Further work confirms that the original conclusions cannot be su...
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Wiley
2025-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202408796 |
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| author | Owain S. Houghton James C. Loudon Alison C. Twitchett‐Harrison Nikolaos T. Panagiotopoulos Giulio I. Lampronti Miguel B. Costa Richard J. Harrison A. Lindsay Greer |
| author_facet | Owain S. Houghton James C. Loudon Alison C. Twitchett‐Harrison Nikolaos T. Panagiotopoulos Giulio I. Lampronti Miguel B. Costa Richard J. Harrison A. Lindsay Greer |
| author_sort | Owain S. Houghton |
| collection | DOAJ |
| description | Abstract After the publication of “Direct formation of hard‐magnetic tetrataenite in bulk alloy castings” Ivanov et al., Advanced Science 10 (2022) 2204315, the authors identified a potential misinterpretation of the experimental data. Further work confirms that the original conclusions cannot be supported, and accordingly the paper is retracted. X‐ray diffraction shows the presence of (Fe,Ni)3P, giving additional Bragg peaks that were previously attributed to tetrataenite. Extra Bragg reflections observed in transmission electron diffraction, and earlier considered to be superlattice reflections from tetrataenite, instead result from oxidation of the sample surface during preparation. Measurements of magnetic hysteresis show no regions of high coercivity of the kind expected when tetrataenite is present. It is concluded that as‐cast bulk samples of Fe‐Ni‐P‐(C) show no evidence of tetrataenite on any length scale. Nevertheless, the addition of phosphorus should remain of interest in ongoing efforts to manufacture tetrataenite. |
| format | Article |
| id | doaj-art-6aea3a6d03604db599a7f12ed125e2ee |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-6aea3a6d03604db599a7f12ed125e2ee2025-01-29T09:50:18ZengWileyAdvanced Science2198-38442025-01-01124n/an/a10.1002/advs.202408796Reinterpretation of Report of Tetrataenite in Bulk Alloy CastingsOwain S. Houghton0James C. Loudon1Alison C. Twitchett‐Harrison2Nikolaos T. Panagiotopoulos3Giulio I. Lampronti4Miguel B. Costa5Richard J. Harrison6A. Lindsay Greer7Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKDepartment of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKDepartment of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKDepartment of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKDepartment of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKDepartment of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKDepartment of Earth Sciences University of Cambridge Downing Street Cambridge CB2 3EQ UKDepartment of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UKAbstract After the publication of “Direct formation of hard‐magnetic tetrataenite in bulk alloy castings” Ivanov et al., Advanced Science 10 (2022) 2204315, the authors identified a potential misinterpretation of the experimental data. Further work confirms that the original conclusions cannot be supported, and accordingly the paper is retracted. X‐ray diffraction shows the presence of (Fe,Ni)3P, giving additional Bragg peaks that were previously attributed to tetrataenite. Extra Bragg reflections observed in transmission electron diffraction, and earlier considered to be superlattice reflections from tetrataenite, instead result from oxidation of the sample surface during preparation. Measurements of magnetic hysteresis show no regions of high coercivity of the kind expected when tetrataenite is present. It is concluded that as‐cast bulk samples of Fe‐Ni‐P‐(C) show no evidence of tetrataenite on any length scale. Nevertheless, the addition of phosphorus should remain of interest in ongoing efforts to manufacture tetrataenite.https://doi.org/10.1002/advs.202408796electron diffraction1magnetic hysteresisorder‐disorderrare‐earth‐free permanent magnettetrataenite |
| spellingShingle | Owain S. Houghton James C. Loudon Alison C. Twitchett‐Harrison Nikolaos T. Panagiotopoulos Giulio I. Lampronti Miguel B. Costa Richard J. Harrison A. Lindsay Greer Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings Advanced Science electron diffraction1 magnetic hysteresis order‐disorder rare‐earth‐free permanent magnet tetrataenite |
| title | Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings |
| title_full | Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings |
| title_fullStr | Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings |
| title_full_unstemmed | Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings |
| title_short | Reinterpretation of Report of Tetrataenite in Bulk Alloy Castings |
| title_sort | reinterpretation of report of tetrataenite in bulk alloy castings |
| topic | electron diffraction1 magnetic hysteresis order‐disorder rare‐earth‐free permanent magnet tetrataenite |
| url | https://doi.org/10.1002/advs.202408796 |
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