TY - JOUR
T1 - Structural, magnetic and mechanical properties of Nd16 (Fe76-xCox)B8 0 ≤ x ≤ 25 alloys
AU - Trujillo Hernández, Juan Sebastián
AU - Talaat, Ahmed
AU - Tabares, Jesús
AU - Lozano, Dagoberto Oyola
AU - Rodríguez, Humberto Bustos
AU - Sánchez, Hugo Martínez
AU - Pérez Alcázar, German Antonio
PY - 2020/8
Y1 - 2020/8
N2 - In this work, the structural, magnetic and mechanical properties of Nd16 Fe76-xCoxB8 alloys with a varying Co content of x = 0, 10, 20 and 25 were experimentally investigated by X-ray diffraction (XRD), Mossbauer 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.
AB - In this work, the structural, magnetic and mechanical properties of Nd16 Fe76-xCoxB8 alloys with a varying Co content of x = 0, 10, 20 and 25 were experimentally investigated by X-ray diffraction (XRD), Mossbauer 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.
KW - Mössbauer spectroscopy
KW - NdFeB magnets
KW - Vibrating sample magnetometry
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85089815447&partnerID=8YFLogxK
U2 - 10.3390/app10165656
DO - 10.3390/app10165656
M3 - Artículo
AN - SCOPUS:85089815447
VL - 10
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
SN - 2076-3417
IS - 16
M1 - 5656
ER -