Method for making soft magnetic parts from particulate...

Details Method for making soft magnetic parts from particulate... Method for making soft magnetic parts from particulate...

H - Electricity

01

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75/155, 148/6

H01F 1/22 (2006.01) B22F 1/02 (2006.01) B22F 3/02 (2006.01) B22F 3/23 (2006.01) B32B 15/02 (2006.01) C22C 33/02 (2006.01) H01F 41/02 (2006.01) H02K 15/12 (2006.01)

Patent

CA 2282527

A method is provided for making soft magnetic parts from particulates of ferrous material. The methods includes the following steps. Providing a plurality of ferrous particles and coating at least one substantially uniform layer of from about 0 wt.% to about 15 wt.% of a metal onto each of the particles. The coated particles are consolidated to form a part, and the part is heated at a temperature and for a time period sufficient to promote the formation of intermetallic phases between the metal layer and the ferrous particle at the boundary therebetween. The intermetallic phases have an electrical resistivity of greater than about 100 ohms/mil-ft.

L'invention concerne un procédé de fabrication de briquettes magnétiques molles à partir de particules d'une matière ferreuse. Ce procédé comprend plusieurs étapes, qui consistent à se procurer une multiplicité de particules ferreuses, puis à appliquer sur chacune de ces particules une couche sensiblement uniforme d'un revêtement renfermant environ 0 % à 15 % en poids d'un métal. Les particules ainsi revêtues sont ensuite consolidées pour former une briquette, cette briquette étant chauffée à une température et pendant un laps de temps suffisants pour favoriser la formation de composés intermétalliques, entre la couche de métal et la particule ferreuse. Ces composés intermétalliques présentent une résistivité électrique supérieure à 100 ohms/mil-pieds.

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