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公开(公告)号：US08177921B2
公开(公告)日：2012-05-15
申请号：US12670718
申请日：2008-07-25
IPC分类号： H01F1/057
CPC分类号： C21D6/00 , B22F2003/248 , B22F2998/10 , C22C33/0278 , C22C38/005 , C22C2202/02 , H01F1/0577 , H01F41/0293 , B22F9/023 , B22F9/04 , B22F3/02 , B22F3/10 , B22F3/24
摘要： An R—Fe—B based rare-earth sintered magnet according to the present invention includes, as a main phase, crystal grains of an R2Fe14B type compound that includes Nd, which is a light rare-earth element, as a major rare-earth element R. The magnet includes a heavy rare-earth element RH (which is at least one of Dy and Tb) that has been introduced through the surface of the sintered magnet by diffusion. The magnet has a region in which the concentration of the heavy rare-earth element RH in a grain boundary R-rich phase is lower than at the surface of the crystal grains of the R2Fe14B type compound but higher than at the core of the crystal grains of the R2Fe14B type compound.
摘要翻译： 本发明的R-Fe-B系稀土类烧结磁体作为主相，含有作为主稀土元素的作为轻稀土元素的Nd的R2Fe14B型化合物的晶粒 元素R.磁体包括通过扩散通过烧结磁体的表面引入的重稀土元素RH（其是Dy和Tb中的至少一种）。 磁体具有这样的区域，其中富R晶相中的重稀土元素RH的浓度比R2Fe14B型化合物的晶粒表面低，但高于晶粒的核心 的R2Fe14B型化合物。
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公开(公告)号：US20110012699A1
公开(公告)日：2011-01-20
申请号：US12670718
申请日：2008-07-25
IPC分类号： H01F7/02
CPC分类号： C21D6/00 , B22F2003/248 , B22F2998/10 , C22C33/0278 , C22C38/005 , C22C2202/02 , H01F1/0577 , H01F41/0293 , B22F9/023 , B22F9/04 , B22F3/02 , B22F3/10 , B22F3/24
摘要： An R—Fe—B based rare-earth sintered magnet according to the present invention includes, as a main phase, crystal grains of an R2Fe14B type compound that includes Nd, which is a light rare-earth element, as a major rare-earth element R. The magnet includes a heavy rare-earth element RH (which is at least one of Dy and Tb) that has been introduced through the surface of the sintered magnet by diffusion. The magnet has a region in which the concentration of the heavy rare-earth element RH in a grain boundary R-rich phase is lower than at the surface of the crystal grains of the R2Fe14B type compound but higher than at the core of the crystal grains of the R2Fe14B type compound.
摘要翻译： 本发明的R-Fe-B系稀土类烧结磁体作为主相，含有作为主稀土元素的作为轻稀土元素的Nd的R2Fe14B型化合物的晶粒 元素R.磁体包括通过扩散通过烧结磁体的表面引入的重稀土元素RH（其是Dy和Tb中的至少一种）。 磁体具有这样的区域，其中富R晶相中的重稀土元素RH的浓度比R2Fe14B型化合物的晶粒表面低，但高于晶粒的核心 的R2Fe14B型化合物。
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公开(公告)号：US20100006182A1
公开(公告)日：2010-01-14
申请号：US12295372
申请日：2007-03-30
CPC分类号： H01F41/026 , C23C14/16 , C23C14/541 , H01F7/0221
摘要： An objective of the present invention is to provide a method for producing a rare earth metal-based permanent magnet having an Al film containing Mg, which exhibits an excellent salt water resistance. The present invention, which is to accomplish the objective, is a method for producing a rare earth metal-based permanent magnet having formed on the surface thereof an Al film containing Mg by a vapor deposition, characterized in that the production method comprises, in the case of cooling the magnet from a high temperature of 160° C. or higher after the completion of the vapor deposition step inside the treating chamber of a deposition apparatus, rapidly cooling down the magnet at a cooling rate of 10° C./min or higher until the temperature of the magnet reaches at least 60° C.
摘要翻译： 本发明的目的是提供一种具有优异的耐盐水性的具有含有Mg的Al膜的稀土金属类永磁体的制造方法。 本发明是为了制造稀土金属类永磁体的方法，其特征在于，在表面形成有通过气相沉积形成Mg的Al膜，其特征在于，在 在沉积设备的处理室内完成气相沉积步骤之后，从160℃或更高的高温冷却磁体的情况，以10℃/ min的冷却速度快速冷却磁体， 直到磁体的温度达到至少60℃为止。
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公开(公告)号：US08641832B2
公开(公告)日：2014-02-04
申请号：US12295372
申请日：2007-03-30
CPC分类号： H01F41/026 , C23C14/16 , C23C14/541 , H01F7/0221
摘要： An objective of the present invention is to provide a method for producing a rare earth metal-based permanent magnet having an Al film containing Mg, which exhibits an excellent salt water resistance. The present invention, which is to accomplish the objective, is a method for producing a rare earth metal-based permanent magnet having formed on the surface thereof an Al film containing Mg by a vapor deposition, characterized in that the production method comprises, in the case of cooling the magnet from a high temperature of 160° C. or higher after the completion of the vapor deposition step inside the treating chamber of a deposition apparatus, rapidly cooling down the magnet at a cooling rate of 10° C./min or higher until the temperature of the magnet reaches at least 60° C.
摘要翻译： 本发明的目的是提供一种具有优异的耐盐水性的具有含有Mg的Al膜的稀土金属类永磁体的制造方法。 本发明是为了制造稀土金属类永磁体的方法，其特征在于，在表面形成有通过气相沉积形成Mg的Al膜，其特征在于，在 在沉积设备的处理室内完成气相沉积步骤之后，从160℃或更高的高温冷却磁体的情况，以10℃/ min的冷却速度快速冷却磁体， 直到磁体的温度达到至少60℃为止。
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