Trujillo Hernández, Juan Sebastián and Talaat, Ahmed and Tabares, Jesús and Oyola Lozano, Dagoberto and Bustos Rodríguez, Humberto and Martínez Sánchez, Hugo and Pérez Alcázar, German Antonio
(2020)
Structural, Magnetic and Mechanical Properties of Nd16 (Fe76−xCox)B8 0 ≤ x ≤ 25 Alloys.
Applied Sciences, 10 (16).
p. 5656.
ISSN 2076-3417
Abstract
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.
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Item Type: |
Article
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Status: |
Published |
Creators/Authors: |
Creators | Email | Pitt Username | ORCID  |
---|
Trujillo Hernández, Juan Sebastián | | | | Talaat, Ahmed | aht17@pitt.edu | aht17 | | Tabares, Jesús | | | | Oyola Lozano, Dagoberto | | | | Bustos Rodríguez, Humberto | | | | Martínez Sánchez, Hugo | | | | Pérez Alcázar, German Antonio | | | |
|
Date: |
18 September 2020 |
Date Type: |
Publication |
Journal or Publication Title: |
Applied Sciences |
Volume: |
10 |
Number: |
16 |
Publisher: |
MDPI AG |
Page Range: |
p. 5656 |
DOI or Unique Handle: |
10.3390/app10165656 |
Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering and Materials Science |
Refereed: |
Yes |
Uncontrolled Keywords: |
Mössbauer spectroscopy, X-ray diffraction, vibrating sample magnetometry, NdFeB magnets |
ISSN: |
2076-3417 |
Official URL: |
http://dx.doi.org/10.3390/app10165656 |
Funders: |
COLCIENCIAS, Convocatoria |
Article Type: |
Research Article |
Date Deposited: |
19 May 2021 18:21 |
Last Modified: |
19 May 2021 18:21 |
URI: |
http://d-scholarship.pitt.edu/id/eprint/41128 |
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