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METHOD OF MANUFACTURING MAGNET, AND MAGNET

  • US 20130222093A1
  • Filed: 02/20/2013
  • Published: 08/29/2013
  • Est. Priority Date: 02/27/2012
  • Status: Active Grant
First Claim
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1. A method of manufacturing a magnet from a hard magnetic material formed of material powders made of a R—

  • Fe—

    N compound containing a light rare earth element as R, or material powders made of a Fe—

    N compound, the method characterized by comprising;

    a forming step of forming a compact in which a density of the hard magnetic material powders differs between an outer face side portion and an inside portion of the compact such that a rate of progress of powder bonding due to microwave heating is higher in the inside portion of the compact than in the outer face side portion of the compact when an outer face of the compact is irradiated with microwaves; and

    a microwave heating step of irradiating the outer face of the compact with the microwaves to cause the microwave heating, thereby bonding the hard magnetic material powders by oxide films that are formed on the hard magnetic material powders.

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