Structural, Magnetic and Mechanical Properties of Nd16 (Fe76−xCox)B8 0 ≤ x ≤ 25 Alloys
| Autor: | Dagoberto Oyola Lozano, Jesús A. Tabares, Humberto Bustos Rodríguez, Germán Antonio Pérez Alcázar, Ahmed Talaat, Juan Sebastián Trujillo Hernández, H. Sánchez |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Magnetometer Analytical chemistry chemistry.chemical_element 02 engineering and technology lcsh:Technology 01 natural sciences Indentation hardness law.invention lcsh:Chemistry Paramagnetism law vibrating sample magnetometry 0103 physical sciences General Materials Science lcsh:QH301-705.5 Instrumentation Mossbauer spectrometry 010302 applied physics Fluid Flow and Transfer Processes lcsh:T Mössbauer spectroscopy NdFeB magnets Process Chemistry and Technology General Engineering 021001 nanoscience & nanotechnology lcsh:QC1-999 X-ray diffraction Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 Ferromagnetism chemistry lcsh:TA1-2040 X-ray crystallography Crystallite lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Cobalt lcsh:Physics |
| Zdroj: | Applied Sciences Volume 10 Issue 16 Applied Sciences, Vol 10, Iss 5656, p 5656 (2020) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app10165656 |
| Popis: | In this work, the structural, magnetic and mechanical properties of Nd16Fe76&minus xCoxB8 alloys with a varying Co content of x = 0, 10, 20 and 25 were experimentally investigated by X-ray diffraction (XRD), Mö ssbauer spectrometry (MS) and vibrating sample magnetometry (VSM) at room temperature (RT), and microhardness tests were performed. The system presented hard Nd2Fe14B and the Nd1.1Fe4B4 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 Nd1.1Fe4B4 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. |
| Databáze: | OpenAIRE |
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