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    • 52. 发明授权
    • Rare earth metal-based permanent magnet having corrosion-resistant film and method for producing the same
    • 具有耐腐蚀膜的稀土金属永磁体及其制造方法
    • US06878217B2
    • 2005-04-12
    • US10265725
    • 2002-10-08
    • Atsushi KikugawaFumiaki Kikui
    • Atsushi KikugawaFumiaki Kikui
    • H01F41/02H01F1/053
    • H01F41/026Y10S428/90Y10T428/12465Y10T428/31678
    • The chemical conversion film containing, at least as the constituent components thereof, (a) at least one of the metals selected from molybdenum, zirconium, vanadium, and tungsten; (b) a rare earth metal constituting the magnet; and (c) oxygen, which is formed on the surface of a rare earth metal-based permanent magnet according to the present invention, contains a composite metal oxide provided on the surface of the R-rich phase having a lower oxidation-reduction potential through a preferential reaction of the metallic ions that are present in the form of complex ions or oxide ions, such as of molybdenum, contained in the treatment solution, with the rare earth metals that elute from the magnet. Thus formed composite metal oxide reduces the difference in corrosion potential as to realize a uniform surface potential, and effectively suppresses the corrosion based on potential difference. Furthermore, the chemical conversion film thus formed exhibits excellent corrosion resistance even if it is provided as a thin film. The production method thereof can be implemented at low cost and by a simple process comprising treating the surface of the magnet by using a treatment solution containing a molybdate and the like.
    • 所述化学转化膜至少包含其组成成分,(a)选自钼,锆,钒和钨中的至少一种金属; (b)构成磁体的稀土金属; 和(c)在根据本发明的稀土金属基永磁体的表面上形成的氧含有在富氧相的表面上提供的复合金属氧化物,其具有较低的氧化还原电位通过 存在于处理溶液中所含的复合离子或氧化物离子(例如钼)形式的金属离子与从磁体洗脱的稀土金属的优先反应。 如此形成的复合金属氧化物减少了腐蚀电位的差异,以实现均匀的表面电位,并且有效地抑制了基于电位差的腐蚀。 此外,即使设置为薄膜,这样形成的化学转化膜也具有优异的耐腐蚀性。 其制造方法可以低成本地实施,并且可以通过使用含有钼酸盐等的处理溶液处理磁体表面的简单方法来实现。
    • 53. 发明授权
    • Permanent magnet manufacturing method and press apparatus
    • 永磁体制造方法和压制装置
    • US07344606B2
    • 2008-03-18
    • US10489339
    • 2002-10-18
    • Shuji MinoNoboru Nakamoto
    • Shuji MinoNoboru Nakamoto
    • H01F1/04
    • H01F41/0266H01F1/0573H01F41/0273
    • An anisotropic bonded magnet is produced at a low cost by avoiding various problems caused by remanence. Also, the unit weight and density of a compact is increased by filling even a cavity, having no easily feedable shape, with a magnet powder just as intended. An anisotropic bonded magnet is produced by feeding the cavity of a press machine with a magnetic powder (e.g., an HDDR powder) and compacting it. After the magnetic powder has been positioned outside of the cavity, an oscillating magnetic field (e.g., an alternating magnetic field) is created in a space including the cavity. The magnetic powder is transported into the cavity while being aligned parallel to the oscillating direction of the oscillating magnetic field. Thereafter, the magnetic powder is compressed within the cavity to make a compact for an anisotropic bonded magnet.
    • 通过避免由剩磁引起的各种问题,以低成本制造各向异性粘结磁体。 此外,通过根据需要用磁铁粉末填充甚至没有容易进给的形状的空腔来增加压块的单位重量和密度。 各向异性粘结磁体通过向压机的型腔供给磁性粉末(例如,HDDR粉末)并压实而制造。 在磁粉被定位在空腔外部之后,在包括空腔的空间中产生振荡磁场(例如,交变磁场)。 磁性粉末在平行于振荡磁场的振荡方向对准的同时被输送到空腔中。 此后,磁性粉末在空腔内被压缩以使各向异性粘结磁体成形。
    • 54. 发明申请
    • Method for Producing Rare Earth Metal-Based Permanent Magnet Having Copper Plating Film on the Surface Thereof
    • 用于生产表面具有镀铜膜的稀土金属基永久磁铁的方法
    • US20070269679A1
    • 2007-11-22
    • US11659849
    • 2005-08-09
    • Toshinobu Niinae
    • Toshinobu Niinae
    • C25D3/58B32B15/00B32B15/20
    • H01F41/026C25D3/38C25D7/001H01F1/0577Y10T428/12903
    • [Problems] To provide a method for producing a rare earth metal-based permanent magnet having on the surface thereof a copper plating film by using a novel plating solution for use in a copper electroplating treatment capable of forming a copper plating film having excellent adhesiveness on the surface of a rare earth metal-based permanent magnet. [Means for Resolution] The method for producing a rare earth metal-based permanent magnet having a copper plating film on the surface thereof according to the invention is characterized in that it comprises forming a copper plating film on the surface of a rare earth metal-based permanent magnet by means of a copper electroplating treatment by using a plating solution having its pH adjusted to a range from 9.0 to 11.5 and containing at least the following three components: (1) Cu2+ ions, (2) a chelating agent having a chelate stability constant of 10.0 or higher for Cu2+ ions, and (3) a chelating agent having a chelate stability constant of 16.0 or higher for Fe3+ ions (where, the aforementioned chelate stability constants are confined to conditions of pH 9.0 to 11.5).
    • [问题]提供一种稀土类金属系永久磁铁的制造方法,该稀土类金属系永久磁铁的表面具有使用能够形成具有优异粘合性的镀铜膜的铜电镀处理用新型电镀液的铜镀膜 稀土金属基永磁体的表面。 [解决方法]根据本发明的在其表面上具有镀铜膜的稀土金属基永磁体的制造方法的特征在于,其包括在稀土金属基永久磁铁的表面上形成镀铜膜, 通过使用其pH调节至9.0〜11.5的范围的电镀液,并且至少包含以下三种成分,通过铜电镀处理进行铜基永久磁铁的处理:(1)Cu 2+离子, (2)螯合稳定常数为10.0以上的Cu 2+离子螯合剂,(3)Fe 3+螯合稳定性常数为16.0以上的螯合剂 +离子(其中上述螯合稳定常数限于pH 9.0〜11.5的条件)。