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Viswanathan Panchanathan: Bonded magnet with low losses and easy saturation. Magnequench International, Pennie & Edmonds, March 10, 1998: US05725792 (23 worldwide citation)

The present invention provides a bonded isotropic magnet containing a composition comprising from about 5 to 25% rare earth metal, from about 0.5 to about 4.5% boron, from about 0.5 to about 3.0% niobium, and the balance principally of iron. Such a magnet exhibits low coercivity and low loss upon ag ...


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Viswanathan Panchanathan, William Ray Green, Kevin Allen Young: Isotropic rare earth material of high intrinsic induction. Magnequench International, Pennie & Edmonds, February 6, 2001: US06183572 (10 worldwide citation)

Isotropic magnetic alloy powder having an intrinsic magnetic induction of at least two third of its magnetic remanence and method for making same are provided. The powder is made from an alloy having a composition comprising, by weight percentage, approximately 15 to 35 percent of one or more rare e ...


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Viswanathan Panchanathan: Bonded magnet made from gas atomized powders of rare earth alloy. Magnequench International, May 18, 1999: US05905424 (8 worldwide citation)

Bonded magnets made from gas atomized powders of an rare earth alloy and having good hard magnetic characteristics are provided. The powders have an alloy composition comprising approximately 15 to 34 weight % of RE, 0.8 to 1.2 weight % of B, 0.5 to 4 weight % of TiC, balanced with at least one of F ...


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Viswanathan Panchanathan: Rare-earth iron-boron magnet containing cerium and lanthanum. Magnequench International, Pennie & Edmond, July 17, 2001: US06261387 (3 worldwide citation)

Permanent rare-earth magnets containing Ce are fabricated with coercivity greater than 4 kOe. One composition for such magnets is [Ce


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Viswanathan Panchanathan: High remanence hot pressed magnets. Magnequench International, Pennie & Edmonds, May 7, 1996: US05514224 (2 worldwide citation)

Isotropic hot pressed iron-rare earth metal permanent magnets are provided wherein the hot pressed permanent magnet exhibits magnetic remanences of at least about 9 kG, and most typically about 10 kG. Preferred compositions include a relatively low rare earth content coupled with an optimal amount o ...


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Viswanathan Panchanathan: Rare-earth alloy powders for magnets and process for making magnets from rare-earth alloy powders. Magnequench International, Pennie & Edmonds, October 24, 2000: US06136100 (2 worldwide citation)

A process for passivating rare-earth alloy powders such that magnets formed from the powders have fewer expansion defects is described. By exposing the rare-earth alloy powders to a humid atmosphere, rare-earth oxide impurities that could result in eruptions in the magnets are reduced. Magnets made ...


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Viswanathan Panchanathan: Bonded Nd-Fe-B magnets without volumetric expansion defects. Magnequench International, Pennie & Edmonds, June 13, 2000: US06074492 (2 worldwide citation)

A rare earth-iron-boron magnetic composition containing a rare earth fluoride compound in a sufficient amount to reduce or eliminate the formation of rare earth hydroxide and a method of making the same. The reduction or elimination of the formation of rare earth hydroxide substantially eliminates o ...


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Croat John Joseph: Produit a base delements des terres rares, de fer et dalliages magnetiques, capable de generer une grande quantite denergie, High energy product rare earth-iron magnet alloys. Magnequench International, GOWLING LAFLEUR HENDERSON, June 15, 1993: CA1319034 (1 worldwide citation)

C-3515 Abstract Magnetically hard composition having highvalues of coercivity remanence and energy productcontain rare earth elements, transition metal elementsand boron in suitable proportions. The preferredrare earth elements are neodymium and praseodymium,and the preferred transition metal elemen ...


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Panchanathan Viswanathan, Green William Ray, Young Kevin Allen: Isotropic rare earth material of high intrinsic induction. Magnequench International, October 11, 2000: EP1042766-A1

Isotropic magnetic alloy powder having an intrinsic magnetic induction of at least two third of its magnetic remanence and method for making same are provided. The powder is made from an alloy having a composition comprising, by weight percentage, approximately 15 to 35 percent of one or more rare e ...