By M. Grönefeld (auth.), George C. Hadjipanayis (eds.)
Bonded magnets are the quickest becoming region within the whole marketplace for magnetic fabrics. Their nice merits lie within the affordable net-shape production strategy permitting the success of complicated geometries and their isotropic magnetic houses. power items have greater than quadrupled in recent times, too. The members to this quantity current the present and destiny prestige of bonded magnets, together with overall global construction and distribution, the markets concerned, and the prestige of present and destiny purposes. present novel processing options are defined and new advancements suggested, together with powder creation recommendations, jet casting/melt spinning, atomization and DDDR tactics. the different sorts of bonded magnets reviewed comprise isotropic and anisotropic neodymium-iron-boron, nanocomposites, Sm-Fe interstitial nitrides, Sm-Co and ferrites.
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Additional resources for Bonded Magnets: Proceedings of the NATO Advanced Research Workshop on Science and Technology of Bonded Magnets Newark, U.S.A. 22–25 August 2002
Process In calendering, a pre-mixed granulated compound is fed into temperature-controlled rolls of about 610 or 760 mm diameter. These roll diameters are common in large volume production. A typical arrangement is shown in figure 1. The compound is squeezed with the initial pinch roll and fed for the second pinch roll and so on. At least two passes may be necessary to bring the resultant sheet to size. Normally it is converted into 610 mm wide sheet and magnetized with a fine multipole pattern on one face.
Development An important development is a new magnetic product trademarked as Mag-Edge" . It is developed by Anchor Magnets, a subsidiary of Kane Magnetics International. The 52 TABLE 2. Magnetic Properties Br,mT Hci, kA/m BHmax, kJ/m 3 Temp. 7 patented process yields high magnetic strength from an unusually thin and narrow piece of co-extruded material. 0 mm wide, about one fifth of the volume of conventional extruded ferrite magnet. It is designed to work on the edge, rather than on its face as a ferrite extrusion does.
Mag. 35 (5) (1999b) 3274 . , Sano N. , J. Alloys and Compounds. 293-295 (1999) 872. , Homma M. , ). Magn. Magn. Mater. 239 (2002a) 444. , Okada M. , J. Alloys and Compounds 293-295 (1999) 862. , Kuwano N. , IEEE Trans. Mag . 35 (5) (1999) 3253 . , Sun A. 751 . , Inomata K. , J. Alloys and Compounds 330 (2002b) 892. H. , IEEE Trans. Mag . 35 (5) (1999) 3250. , Hamada N. , Mitarai H. 873. , Kono T. , ir" International Workshop on Rare-earth Magnets and their Applications, Newark (2002e) 636. J. , J.