The influence of short time heat treatment on the structural and magnetic behaviour of Nd2Fe14B/α-Fe nanocomposite obtained by mechanical milling

Optimizing the Sintering Conditions of (Fe,Co)1.95(P,Si) Compounds for Permanent Magnet Applications

“…By optimizing the sintering temperature and minimizing the sintering time just after the ball-milling stage, we seek to form Fe 1.85 Co 0.1 P 0.8 Si 0.2 compounds while preventing grain growth. Finally, we note that short time annealing (a few minutes to half an hour) or low sintering temperatures are not unusual in the preparation of hard magnetic materials with fine microstructure [ 33 , 34 , 35 , 36 , 37 ], so that this possibility is worth exploring in (Fe,Co) 2 (P,Si) compounds.…”

Structural, Magnetic and Mechanical Properties of Nd16 (Fe76−xCox)B8 0 ≤ x ≤ 25 Alloys

“…These results suggest that alloys are composed specifically of the (NdCe) 2 Fe 14 B phase; however, phases such as (CeNd)Fe 2 and (CeNd)Fe 4 B 4 have also been identified. The Mössbauer fit was carried out using six sextets and two doublet components; the average magnetic hyperfine field using Mössbauer and the magnetic properties M s , H c and (BH) max increased for compositions from x = 0 to x = 0,7.These properties are sensible to the type of elements of the hard [14][15][16][17][18][19] and soft phases [14,20], to the grain size of the hard phase [15,16,[21][22][23][24] and to the different techniques used to prepare them [25][26][27][28][29][30][31][32][33][34][35][36]. In addition to studies of magnetic properties, it is also important to consider the mechanical properties of permanent magnets.…”

Reversible and irreversible DC magnetization processes in the frame of magnetic, thermal and electrical properties of Fe-based composite materials

“…the magnetic and thermal isotropy, extremely low classical losses and relatively low total energy losses at medium and higher frequencies (due to an insulating layer between iron powder particles the eddy currents are minimized), as well as a nearly netshape fabrication process ensuring a low cost mass production, which all makes them able to compete with traditionally used materials such as FeSi steels or soft magnetic ferrites at a similar production cost or even cheaper [1][2][3][4][5]. SMCs are well suited for use in alternating magnetic fields for electromagnetic applications such as cores with three dimensional ferromagnetic behaviour for transformers and electromotors, also as the electromagnetic circuits, sensors, electromagnetic actuation devices, low frequency filters, induction field coils, magnetic seal systems and magnetic field shielding [3][4][5][6][7]. One of the advantages of SMCs are their relatively low energy losses at medium and higher frequencies compared to FeSi steels -the cross-over point is about 400 Hz, where the losses for both materials are similar (at 1.5 T of about 90 W/kg, according to [1]).…”

“…One of the advantages of SMCs are their relatively low energy losses at medium and higher frequencies compared to FeSi steels -the cross-over point is about 400 Hz, where the losses for both materials are similar (at 1.5 T of about 90 W/kg, according to [1]). SMCs are typically produced by the powder metallurgy processing methodsdepending on the chosen combinations of materials and processing parameters, a wide range of properties can be obtained, so the electromagnetic and mechanical properties of SMCs can be tuned, within their physical limits, to the requirements of particular application [3][4][5][6].…”