Method for preparing a powder of an alloy based on uranium and molybdenum
    33.
    发明授权
    Method for preparing a powder of an alloy based on uranium and molybdenum 有权
    用于制备基于铀和钼的合金粉末的方法

    公开(公告)号:US09190180B2

    公开(公告)日:2015-11-17

    申请号:US13977259

    申请日:2011-12-23

    Abstract: A method for preparing a powder of an alloy based on uranium and molybdenum in a metastable γ phase is provided, which comprises: a) putting at least one first reagent selected from uranium oxides and mixtures thereof, uranium fluorides and mixtures thereof, into contact with a second reagent consisting in molybdenum and a third reagent consisting in a reducing metal, the first, second and third reagents being in a divided form; b) reacting the reagents at a temperature≧the melting temperature of the third reagent and under an inert atmosphere, whereby this reaction leads to the formation of the alloy comprising uranium and molybdenum in the form of a powder, for which the particles are covered with a reducing metal oxide or fluoride layer; c) cooling the so formed powder at a rate at least equal to 450° C./hour; and d) removing the reducing metal oxide or fluoride layer which covers the particles of the powder of the alloy comprising uranium and molybdenum.

    Abstract translation: 提供了一种在亚稳γ相中制备基于铀和钼的合金粉末的方法,其包括:a)将至少一种选自氧化铀及其混合物的铀氟化物及其混合物的第一试剂与 由钼组成的第二试剂和由还原金属组成的第三试剂,第一试剂,第二试剂和第三试剂为分开形式; b)在温度≥第三试剂的熔融温度和惰性气氛下使试剂反应,由此该反应导致形成粉末形式的包含铀和钼的合金,其中颗粒被覆盖 还原金属氧化物或氟化物层; c)以至少等于450℃/小时的速率冷却如此形成的粉末; 以及d)除去覆盖包含铀和钼的合金粉末颗粒的还原性金属氧化物或氟化物层。

    METHOD FOR PRODUCING SURFACE-MODIFIED RARE EARTH METAL-BASED SINTERED MAGNET
    36.
    发明申请
    METHOD FOR PRODUCING SURFACE-MODIFIED RARE EARTH METAL-BASED SINTERED MAGNET 有权
    用于生产表面改性的稀土金属基烧结磁体的方法

    公开(公告)号:US20130098509A1

    公开(公告)日:2013-04-25

    申请号:US13807111

    申请日:2011-06-29

    Abstract: An object of the present invention is to provide a method for producing a surface-modified rare earth metal-based sintered magnet having extremely excellent corrosion resistance even in an environment with fluctuating temperature and humidity and also having excellent magnetic characteristics. The method for producing a surface-modified rare earth metal-based sintered magnet of the present invention as a means for achieving the object is characterized by comprising a step of subjecting a rare earth metal-based sintered magnet to a heat treatment at 200° C. to 600° C. in an atmosphere having an oxygen partial pressure of 1×103 Pa to 1×105 Pa and a water vapor partial pressure of 45 Pa or less with the ratio between the oxygen partial pressure and the water vapor partial pressure (oxygen partial pressure/water vapor partial pressure) being 450 to 20000.

    Abstract translation: 本发明的目的是提供即使在具有波动的温度和湿度的环境中也具有优异的磁特性的,具有极好的耐腐蚀性的表面改性的稀土金属基烧结磁体的制造方法。 本发明的表面改性稀土金属类烧结磁体的制造方法作为实现目的的手段,其特征在于,包括使稀土类金属系烧结磁体在200℃下进行热处理的工序 在氧分压为1×10 3 Pa〜1×10 5 Pa,水蒸气分压为45Pa以下的气氛中,在氧分压与水蒸气分压之间, 氧分压/水蒸气分压)为450〜20000。

    Soft magnetic composite materials
    40.
    发明申请
    Soft magnetic composite materials 有权
    软磁复合材料

    公开(公告)号:US20090042051A1

    公开(公告)日:2009-02-12

    申请号:US11921514

    申请日:2006-06-15

    Abstract: A process for the manufacture of soft magnetic composite components is provided comprising the steps of die compacting a powder composition comprising a mixture of soft magnetic, iron or iron-based powder, the core particles of which are surrounded by an electrically insulating, inorganic coating, and an organic lubricant in an amount of 0.05 to 1.5% by weight of the composition, the organic lubricant being free from metal and having a temperature of vaporisation less than the decomposition temperature of the coating; ejecting the compacted body from the die; heating the compacted body in a non-reducing atmosphere to a temperature above the vaporisation temperature of the lubricant and below the decomposition temperature of the inorganic coating for removing the lubricant from the compacted body, and subjecting the obtained body to heat treatment at a temperature between 3000 and 6000 in water vapour. The invention also concerns soft magnetic composite components having a transverse rupture strength of at least 100 MPa, a permeability of at least 700, and a core loss at 1 Tesla and 400 Hz of at most 70 W/kg.

    Abstract translation: 提供了一种用于制造软磁性复合材料部件的方法,包括以下步骤:将包含软磁性,铁或铁基粉末的混合物的粉末组合物模压成型,其核心颗粒被电绝缘的无机涂层包围, 和有机润滑剂,其含量为组合物重量的0.05-1.5%,有机润滑剂不含金属,其蒸发温度小于涂层的分解温度; 将压实体从模具中弹出; 将非压缩气氛中的压实体加热至高于润滑剂蒸发温度的温度并低于无机涂层的分解温度,以从压实体中除去润滑剂,并将所得体在 3000和6000水蒸汽。 本发明还涉及具有至少100MPa的横向断裂强度,至少700的渗透率和至多70W / kg的1特斯拉和400Hz的铁心损耗的软磁性复合材料部件。

Patent Agency Ranking