The parameters that produce optimum magnetic properties in Fe‐Nd‐B and R‐Co alloy powders are discussed (R denotes rare earth). It is shown that the maximum properties are obtained at an optimum powder particle size of 2 μm. In particles of this optimum size an outer layer of chemically heterogeneous compounds is found by using a combination of x‐ray‐diffraction Auger
Read MoreApr 19 2010 · The effects of jet milling conditions on powder particle size microstructure and magnetic properties were systematically studied. For a magnet alloy nominally composed of Nd11.9(Fe0.93Co0.07)82.6B5.5 a particulate yield of D10=2 μm D50=6 μm and D90=11 μm and magnetic properties of Br=8.82 kG Hci=9.5 kOe and (BH)max=15.3 MGOe have been
Read MoreIn this work the influence of milling medium was investigated in order to achieve high energy-product Nd-Fe-B magnets mostly by the remanence improvement related to the obtention of monocrystalline particles during milling. Nd-Fe-B alloy made by strip-casting process were used as starting material which exhibits refined grain structure and demands special attention during milling in
Read MoreBall milling conditions were examined for the preparation of fine Sm/sub 2/Fe/sub 17/N/sub 3/ particles. The milling process with high ball/bottle volume r Influence of milling conditions on magnetic properties of Sm/sub 2/Fe/sub 17/N/sub 3/ particlesIEEE Journals Magazine
Read MoreThe influence of the milling and annealing conditions (temperature and time) on the structural and magnetic properties of (Nd0.92Dy0.08)2Fe14B/alfa -Fe nanocomposite have been investigated.
Read Moreinvestigate the effect of different milling conditions (milling with different diameter balls) on the structural microstructural and magnetic properties of Nd 2Fe 14B/10wt Fe nanocomposites. 2 Experimental details The Nd 2Fe 14B ingot was prepared by induction melting in a purified Ar atmosphere followed by annealing in vacuum at 950 °C for
Read MoreThe sample after milling was heated at temperature 600 700 and 800 °C in vacuum condition (10-3 Pa) for one hour. The measurement result of x-ray diffraction show that the Nd 2 Fe 14 B phase already formed as dominant phase and Fe-phase after milling 40 hours with magnetic remanence (mr) = 4.10 emu/g and coercivity = 1 5 kOe. After heat
Read MoreThe influence of the milling and annealing conditions on the magnetic and structural behaviour of SmCo 5 /α-Fe has been studied by X-ray diffraction electron microscopy magnetic measurements
Read More4. Conclusion. The nano-sized LaFeO 3 has been successfully prepared by different methods. The particle size of nano-LaFeO 3 is varying from about 10 to 50 nm depending on the preparation method. The prepared nano-LaFeO 3 exhibited a ferromagnetic behavior and the particle size influences the magnetic properties of nano-LaFeO 3.The 𝑀 (𝐻) curve was well fitted by Langevin function.
Read MoreInfluence of milling conditions on magnetic properties of Sm/sub 2/Fe/sub 17/N/sub 3/ particles Tajima S. Hattori T. Kato Y. Abstract. Publication IEEE Transactions on Magnetics. Pub Date November 1995 DOI 10.1109/20.489700 Bibcode 1995ITM.31.3701T full text sources. Publisher
Read MoreABSTRACT Rare earth substituted W-type hexaferrites were prepared by mixing and ball milling starting powders with molar ratios consistent with the stoichiometry of Ba 1-x Re x Co 2 Zn x Fe 16-x O 27 (Re is a rare-earth element x = 0.1 and 0.2) pelletizing and sintering 1300° C. X-ray diffraction patterns showed a pure W-type phase in all samples except in the Nd-Zn (x = 0.1) substituted
Read MoreApr 19 2010 · The effects of jet milling conditions on powder particle size microstructure and magnetic properties were systematically studied. For a magnet alloy nominally composed of Nd11.9(Fe0.93Co0.07)82.6B5.5 a particulate yield of D10=2 μm D50=6 μm and D90=11 μm and magnetic properties of Br=8.82 kG Hci=9.5 kOe and (BH)max=15.3 MGOe have been
Read MoreMilling energy •hard magnetic phases of Nd 2 Fe 14 B •soft magnetic phases of -Fe (10 wt ) Different milling energy 1. Different milling balls Φ10 mm and 15 mm 2. Different milling time 6 h and 8 h of MM Nanocomposites prepared by mechanical milling (MM)
Read MoreInfluence of ball milling on their magnetic properties had been investigated by means of X-Ray Diffraction (XRD) Transmission Electron Microscopy (TEM) and Vibrating Sample Magnetometer (VSM) etc
Read MoreThe influence of milling conditions and reductant on structure and magnetic properties was investigated. It is shown that the production of uniform nano-sized powders by mechanochemical processing requires a high particle-to-by-product ratio and avoidance of combustion by the use of low energy milling conditions or by the addition of diluents.
Read More1. Introduction. Nd 2 Fe 14 B permanent magnets have been recognized as the most energy-efficient hard magnets with excellent magnetic properties .Nd 2 Fe 14 B magnets have been widely used in energy conversion systems wind turbines electric vehicles and other fields due to the combination of its highest energy product (BH) max and high coercivity. . Furthermore with the increasing pursuit
Read More(1) Influence of milling and the ratio of ball to powder Fig. 1 shows relationships between the magnetic properties of Nd(Fe Mo) 12 N x particles and mechanical milling conditions. When the ratio of ball to powder was 10 1 the i H c value increased to 7.6 kOe with the milling time.
Read MoreBall milling conditions were examined for the preparation of fine Nd(Fe Mo) 12 N x particles. The milling process with high ratio of ball to powder produced Nd(Fe Mo) 12 N x particles with low iH c and 4πI r.The decrease in 4πI r and iH c was attributed to population of α-Fe and particle aggregates that were formed during the milling. The addition of process control agents (PCA e.g
Read MoreThe sample after milling was heated at temperature 600 700 and 800 °C in vacuum condition (10-3 Pa) for one hour. The measurement result of x-ray diffraction show that the Nd 2 Fe 14 B phase already formed as dominant phase and Fe-phase after milling 40 hours with magnetic remanence (mr) = 4.10 emu/g and coercivity = 1 5 kOe. After heat
Read More1. Introduction. Nd 2 Fe 14 B permanent magnets have been recognized as the most energy-efficient hard magnets with excellent magnetic properties .Nd 2 Fe 14 B magnets have been widely used in energy conversion systems wind turbines electric vehicles and other fields due to the combination of its highest energy product (BH) max and high coercivity. . Furthermore with the increasing pursuit
Read MoreBall milling conditions were examined for the preparation of fine Sm/sub 2/Fe/sub 17/N/sub 3/ particles. The milling process with high ball/bottle volume r Influence of milling conditions on magnetic properties of Sm/sub 2/Fe/sub 17/N/sub 3/ particlesIEEE Journals Magazine
Read MoreInfluence of Synthesis Conditions on the Interphase Exchange Coupling of Nd 2 Fe 14B/α-Fe Nanocomposite Obtained by Mechanical Milling R. Hirian1 S. Mican1 I. Chicinaş3 O. Isnard2 S. Gutoiu4 and V. Pop1 1 Faculty of Physics Babeş-Bolyai University Cluj Napoca RO 400084 Romania 2 Université Grenoble Alpes Institut Néel Grenoble F-38042 France
Read MoreInfluence of Milling Time on Magnetic Properties and Microstructure of Sintered Nd-Fe-B Based Permanent Magnets Article (PDF Available) in Materials Science Forum 930 445-448 ·
Read MoreJan 25 2018 · Abstract. The effect of the wet milling time on the magnetic properties of powder compositions consisting of the hard magnetic Sm 2 Fe 17 N x (x = 2.9–3.0) nitride and a rapidly quenched Nd 9.6 Fe 76.3 Co 4.3 Zr 3.4 B 6.4 (at ) alloy which are taken in different mass proportions is studied. The compositions containing no more than 20 wt alloy are found to exhibit a substantial
Read MoreThe influence of the milling and annealing conditions on the magnetic and structural behaviour of SmCo 5 /α-Fe has been studied by X-ray diffraction electron microscopy magnetic measurements
Read MoreBy adding magnetic powders into matrix material it has been proved to be a creative approach to improve tribological properties of brake materials. In this paper a novel magnetic brake material with Nd–Fe–B and nano-Fe 3 O 4 was developed and the influential mechanism of these two magnetic powders and their content on the friction and
Read More4. Conclusion. The nano-sized LaFeO 3 has been successfully prepared by different methods. The particle size of nano-LaFeO 3 is varying from about 10 to 50 nm depending on the preparation method. The prepared nano-LaFeO 3 exhibited a ferromagnetic behavior and the particle size influences the magnetic properties of nano-LaFeO 3.The 𝑀 (𝐻) curve was well fitted by Langevin function.
Read Moreoptimum heat-treatment conditions. The magnetic domain struc ture of the magnet subjected to an optimum heat treatment has been studied. The effect of different low-temperature heat treatments on the magnetic properties of magnets has been demonstrated. Key words Nd-Pr-Fe-B magnet in the magnetic (Nd x Pr 1-x) 2 Fe 14
Read MoreInfluence of Milling Time on Magnetic Properties and Microstructure of Sintered Nd -Fe -B Based Permanent Magnets . Fim R.G.T. 1 a Silva M.R.M
Read MoreThe influence of the milling and annealing conditions (temperature and time) on the structural and magnetic properties of (Nd0.92Dy0.08)2Fe14B/alfa -Fe nanocomposite have been investigated.
Read MoreW-type hexaferrite was recognized as a soft magnetic material with potential importance for microwave absorption. 18-23 The microwave properties of the W-type phase were improved by cationic substitutions such as the partial substitution of Ba 2 ions by Er 3 Sm 3 and Nd 3 . 15 23 24 Also partial substitution of Dy 3 for Fe 3 in Ni 2
Read MoreThe influence of milling conditions and reductant on structure and magnetic properties was investigated. It is shown that the production of uniform nano-sized powders by mechanochemical processing requires a high particle-to-by-product ratio and avoidance of combustion by the use of low energy milling conditions or by the addition of diluents.
Read MoreThe influence of the milling and annealing conditions (temperature and time) on the structural and magnetic properties of (Nd0.92Dy0.08)2Fe14B/alfa -Fe nanocomposite have been investigated.
Read MoreIn this paper the effect of the grain size on sintered Nd-Fe-B based permanent magnets was investigated. In order the magnets were produced by different milling times at 200 rpm and then vacuum sintered at 1373 K for 60 minutes followed by cooling outside the furnace. The magnets either produced by lower and higher milling times (30 and 75 minutes) exhibited lower remanence and coercivity
Read MoreAbstract. In this paper we present the results of an investigation of the influence of fabrication conditions on the structure and magnetic properties of Nd 10.5-x Fe 83.5-y Co x Nb y B 6 (x=0-6 y=1.5-3) nanocomposites prepared by melt-spinning combined with annealing. By changing the quenching rate (by varying the tangential velocity of the copper wheel from 10 m s-1 to 40 m s-1) one
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