Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets
Lab scale additive manufacturing of Fe-Nd-B based powders was performed to realize bulk nanocrystalline Fe-Nd-B based permanent magnets. For fabrication a special inert gas process chamber for laser powder bed fusion was used. Inspired by the nanocrystalline ribbon structures, well-known from melt-s...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-05-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/12/5/538 |
| _version_ | 1797534790820298752 |
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| author | Dagmar Goll Felix Trauter Timo Bernthaler Jochen Schanz Harald Riegel Gerhard Schneider |
| author_facet | Dagmar Goll Felix Trauter Timo Bernthaler Jochen Schanz Harald Riegel Gerhard Schneider |
| author_sort | Dagmar Goll |
| collection | DOAJ |
| description | Lab scale additive manufacturing of Fe-Nd-B based powders was performed to realize bulk nanocrystalline Fe-Nd-B based permanent magnets. For fabrication a special inert gas process chamber for laser powder bed fusion was used. Inspired by the nanocrystalline ribbon structures, well-known from melt-spinning, the concept was successfully transferred to the additive manufactured parts. For example, for Nd16.5-Pr1.5-Zr2.6-Ti2.5-Co2.2-Fe65.9-B8.8 (excess rare earth (RE) = Nd, Pr; the amount of additives was chosen following Magnequench (MQ) powder composition) a maximum coercivity of <i>µ</i><sub>0</sub><i>H</i><sub>c</sub> = 1.16 T, remanence <i>J</i><sub>r</sub> = 0.58 T and maximum energy density of (<i>BH</i>)<sub>max</sub> = 62.3 kJ/m<sup>3</sup> have been achieved. The most important prerequisite to develop nanocrystalline printed parts with good magnetic properties is to enable rapid solidification during selective laser melting. This is made possible by a shallow melt pool during laser melting. Melt pool depths as low as 20 to 40 µm have been achieved. The printed bulk nanocrystalline Fe-Nd-B based permanent magnets have the potential to realize magnets known so far as polymer bonded magnets without polymer. |
| first_indexed | 2024-03-10T11:34:30Z |
| format | Article |
| id | doaj.art-44f57964ddd3467b9c5f5b1be0148a17 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-10T11:34:30Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-44f57964ddd3467b9c5f5b1be0148a172023-11-21T18:56:22ZengMDPI AGMicromachines2072-666X2021-05-0112553810.3390/mi12050538Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent MagnetsDagmar Goll0Felix Trauter1Timo Bernthaler2Jochen Schanz3Harald Riegel4Gerhard Schneider5Materials Research Institute, Aalen University, 73430 Aalen, GermanyMaterials Research Institute, Aalen University, 73430 Aalen, GermanyMaterials Research Institute, Aalen University, 73430 Aalen, GermanyLaser Application Center, Aalen University, 73430 Aalen, GermanyLaser Application Center, Aalen University, 73430 Aalen, GermanyMaterials Research Institute, Aalen University, 73430 Aalen, GermanyLab scale additive manufacturing of Fe-Nd-B based powders was performed to realize bulk nanocrystalline Fe-Nd-B based permanent magnets. For fabrication a special inert gas process chamber for laser powder bed fusion was used. Inspired by the nanocrystalline ribbon structures, well-known from melt-spinning, the concept was successfully transferred to the additive manufactured parts. For example, for Nd16.5-Pr1.5-Zr2.6-Ti2.5-Co2.2-Fe65.9-B8.8 (excess rare earth (RE) = Nd, Pr; the amount of additives was chosen following Magnequench (MQ) powder composition) a maximum coercivity of <i>µ</i><sub>0</sub><i>H</i><sub>c</sub> = 1.16 T, remanence <i>J</i><sub>r</sub> = 0.58 T and maximum energy density of (<i>BH</i>)<sub>max</sub> = 62.3 kJ/m<sup>3</sup> have been achieved. The most important prerequisite to develop nanocrystalline printed parts with good magnetic properties is to enable rapid solidification during selective laser melting. This is made possible by a shallow melt pool during laser melting. Melt pool depths as low as 20 to 40 µm have been achieved. The printed bulk nanocrystalline Fe-Nd-B based permanent magnets have the potential to realize magnets known so far as polymer bonded magnets without polymer.https://www.mdpi.com/2072-666X/12/5/538additive manufacturingNdFeBselective laser melting (SLM)laser powder bed fusion (L-PBF)coercivitynanocrystalline magnets |
| spellingShingle | Dagmar Goll Felix Trauter Timo Bernthaler Jochen Schanz Harald Riegel Gerhard Schneider Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets Micromachines additive manufacturing NdFeB selective laser melting (SLM) laser powder bed fusion (L-PBF) coercivity nanocrystalline magnets |
| title | Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets |
| title_full | Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets |
| title_fullStr | Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets |
| title_full_unstemmed | Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets |
| title_short | Additive Manufacturing of Bulk Nanocrystalline FeNdB Based Permanent Magnets |
| title_sort | additive manufacturing of bulk nanocrystalline fendb based permanent magnets |
| topic | additive manufacturing NdFeB selective laser melting (SLM) laser powder bed fusion (L-PBF) coercivity nanocrystalline magnets |
| url | https://www.mdpi.com/2072-666X/12/5/538 |
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