Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys
In this work, the structural, magnetic and mechanical properties of Nd<sub>16</sub>Fe<sub>76−x</sub>Co<sub>x</sub>B<sub>8</sub> alloys with a varying Co content of x = 0, 10, 20 and 25 were experimentally investigated by X-ray diffraction (XRD), Mössba...
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MDPI AG
2020-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/16/5656 |
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| author | Juan Sebastián Trujillo Hernández Ahmed Talaat Jesús Tabares Dagoberto Oyola Lozano Humberto Bustos Rodríguez Hugo Martínez Sánchez German Antonio Pérez Alcázar |
| author_facet | Juan Sebastián Trujillo Hernández Ahmed Talaat Jesús Tabares Dagoberto Oyola Lozano Humberto Bustos Rodríguez Hugo Martínez Sánchez German Antonio Pérez Alcázar |
| author_sort | Juan Sebastián Trujillo Hernández |
| collection | DOAJ |
| description | In this work, the structural, magnetic and mechanical properties of Nd<sub>16</sub>Fe<sub>76−x</sub>Co<sub>x</sub>B<sub>8</sub> alloys with a varying Co content of x = 0, 10, 20 and 25 were experimentally investigated by X-ray diffraction (XRD), Mössbauer spectrometry (MS) and vibrating sample magnetometry (VSM) at room temperature (RT), and microhardness tests were performed. The system presented hard Nd<sub>2</sub>Fe<sub>14</sub>B and the Nd<sub>1.1</sub>Fe<sub>4</sub>B<sub>4</sub> phases for samples with x = 0; when the concentration increased to x = 20 and 25, the CoO phase appeared. All MS data showed ferromagnetic behavior (eight sextets: sites 16k1, 16k2, 8j1, 8j2, 4c, 4e, sb) associated with the hard and soft magnetic phases, and one paramagnetic component (doublet: site d) associated with the minority Nd<sub>1.1</sub>Fe<sub>4</sub>B<sub>4</sub> phase, which was not identified by XRD. All samples were magnetically hard and presented hard magnetic behavior. The increase of Co content in these samples did not improve the hard magnetic properties but increased the critical temperature of the system and decreased the crystallite size of the hard phase. There was a general tendency towards increased microhardness with cobalt content that was attributable to cobalt doping, which reduces the lattice parameters and porosities within the sample, improving its hardness. |
| first_indexed | 2024-03-10T17:25:29Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T17:25:29Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-915d1b9930a6411b9226ac47739894502023-11-20T10:12:22ZengMDPI AGApplied Sciences2076-34172020-08-011016565610.3390/app10165656Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 AlloysJuan Sebastián Trujillo Hernández0Ahmed Talaat1Jesús Tabares2Dagoberto Oyola Lozano3Humberto Bustos Rodríguez4Hugo Martínez Sánchez5German Antonio Pérez Alcázar6Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué 730007, ColombiaDepartment of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh, PA 15261, USAFacultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué 730007, ColombiaDepartamento de Física, Universidad del Tolima, Ibagué 730006299, Tolima, ColombiaDepartamento de Física, Universidad del Tolima, Ibagué 730006299, Tolima, ColombiaDepartamento de Física, Universidad del Valle, A. A., Cali 25360, ColombiaFacultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué 730007, ColombiaIn this work, the structural, magnetic and mechanical properties of Nd<sub>16</sub>Fe<sub>76−x</sub>Co<sub>x</sub>B<sub>8</sub> alloys with a varying Co content of x = 0, 10, 20 and 25 were experimentally investigated by X-ray diffraction (XRD), Mössbauer spectrometry (MS) and vibrating sample magnetometry (VSM) at room temperature (RT), and microhardness tests were performed. The system presented hard Nd<sub>2</sub>Fe<sub>14</sub>B and the Nd<sub>1.1</sub>Fe<sub>4</sub>B<sub>4</sub> phases for samples with x = 0; when the concentration increased to x = 20 and 25, the CoO phase appeared. All MS data showed ferromagnetic behavior (eight sextets: sites 16k1, 16k2, 8j1, 8j2, 4c, 4e, sb) associated with the hard and soft magnetic phases, and one paramagnetic component (doublet: site d) associated with the minority Nd<sub>1.1</sub>Fe<sub>4</sub>B<sub>4</sub> phase, which was not identified by XRD. All samples were magnetically hard and presented hard magnetic behavior. The increase of Co content in these samples did not improve the hard magnetic properties but increased the critical temperature of the system and decreased the crystallite size of the hard phase. There was a general tendency towards increased microhardness with cobalt content that was attributable to cobalt doping, which reduces the lattice parameters and porosities within the sample, improving its hardness.https://www.mdpi.com/2076-3417/10/16/5656Mössbauer spectroscopyX-ray diffractionvibrating sample magnetometryNdFeB magnets |
| spellingShingle | Juan Sebastián Trujillo Hernández Ahmed Talaat Jesús Tabares Dagoberto Oyola Lozano Humberto Bustos Rodríguez Hugo Martínez Sánchez German Antonio Pérez Alcázar Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys Applied Sciences Mössbauer spectroscopy X-ray diffraction vibrating sample magnetometry NdFeB magnets |
| title | Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys |
| title_full | Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys |
| title_fullStr | Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys |
| title_full_unstemmed | Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys |
| title_short | Structural, Magnetic and Mechanical Properties of Nd<sub>16</sub> (Fe<sub>76−x</sub>Co<sub>x</sub>)B<sub>8</sub> 0 ≤ x ≤ 25 Alloys |
| title_sort | structural magnetic and mechanical properties of nd sub 16 sub fe sub 76 x sub co sub x sub b sub 8 sub 0 ≤ x ≤ 25 alloys |
| topic | Mössbauer spectroscopy X-ray diffraction vibrating sample magnetometry NdFeB magnets |
| url | https://www.mdpi.com/2076-3417/10/16/5656 |
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