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    • 8. 发明申请
    • Coating Method and Apparatus, a Permanent Magnet, and Manufacturing Method Thereof
    • 涂布方法和装置,永久磁铁及其制造方法
    • US20080257716A1
    • 2008-10-23
    • US11886629
    • 2006-03-14
    • Hiroshi NagataYoshinori Shingaki
    • Hiroshi NagataYoshinori Shingaki
    • C23C14/54C23C14/22H01F1/053H01F10/12H01F41/20
    • C23C14/16C23C14/243C23C14/541H01F1/0571H01F10/126H01F41/0293H01F41/20
    • A film is formed at a high rate on the surface of an iron-boron-rare-earth-metal magnet having a given shape, while effectively using dysprosium or terbium as a film-forming material. Thus, productivity is improved and a permanent magnet can be produced at low cost. A permanent magnet is produced through a film formation step in which a film of dysprosium is formed on the surface of an iron-boron-rare-earth-metal magnet of a given shape and a diffusion step in which the magnet coated is subjected to a heat treatment at a given temperature to cause the dysprosium deposited on the surface to diffuse into the grain boundary phase of the magnet. The film formation step comprises: a first step in which a treating chamber where this film formation is performed is heated to vaporize dysprosium which has been disposed in this treating chamber and thereby form a dysprosium vapor atmosphere having a given vapor pressure in the treating chamber; and a second step in which a magnet kept at a temperature lower than the internal temperature of the treating chamber is introduced into this treating chamber and the dysprosium is selectively deposited on the magnet surface based on a temperature difference between the treating chamber and the magnet until the magnet temperature reaches a given value.
    • 在具有给定形状的铁 - 硼 - 稀土金属磁体的表面上以高比率形成膜,同时有效地使用镝或铽作为成膜材料。 因此,提高生产率,并且可以以低成本生产永磁体。 通过成膜步骤制造永磁体,其中在给定形状的铁 - 硼 - 稀土 - 金属磁体的表面上形成镝的膜,并且扩散步骤,其中涂覆的磁体经受 在给定温度下进行热处理,使沉积在表面上的镝扩散到磁体的晶界相。 成膜步骤包括:第一步骤,其中进行该成膜的处理室被加热以蒸发已经设置在该处理室中的镝,从而在处理室中形成具有给定蒸气压的镝蒸汽气氛; 并且将保持在比处理室的内部温度低的温度的磁体引入该处理室中的第二步骤,并且基于处理室和磁体之间的温度差选择性地将镝沉积在磁体表面上,直到 磁体温度达到给定值。