公开(公告)号：US09558885B2

公开(公告)日：2017-01-31

申请号：US13807111

申请日：2011-06-29

Applicant: Mahoro Fujihara ,  Koshi Yoshimura

Inventor： Mahoro Fujihara ,  Koshi Yoshimura

IPC: C23C8/10 ,  H01F41/00 ,  H01F41/02 ,  H01F1/01 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  B22F3/24 ,  H01F1/057

CPC classification number: H01F41/005 ,  B22F2003/248 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  C23C8/10 ,  H01F1/01 ,  H01F1/0536 ,  H01F1/0577 ,  H01F41/026 ,  B22F2201/03 ,  B22F2201/05

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。

公开(公告)号：US09275794B2

公开(公告)日：2016-03-01

申请号：US13056387

申请日：2009-07-30

Applicant: Atsushi Kikugawa ,  Koshi Yoshimura ,  Yoshimi Tochishita ,  Masanao Kamachi ,  Nobuhiro Misumi

Inventor： Atsushi Kikugawa ,  Koshi Yoshimura ,  Yoshimi Tochishita ,  Masanao Kamachi ,  Nobuhiro Misumi

IPC: H01F41/02 ,  B22F3/24 ,  B32B15/01 ,  C22C33/02 ,  C22C38/00 ,  C22C38/10 ,  H01F7/02 ,  H01F1/057

CPC classification number: H01F41/026 ,  B22F3/24 ,  B22F2003/242 ,  B22F2998/00 ,  B32B15/012 ,  C22C33/0278 ,  C22C38/005 ,  C22C38/10 ,  C22C2202/02 ,  H01F1/0577 ,  H01F7/0221

Abstract: An object of the present invention is to provide an R—Fe—B based sintered magnet that exhibits excellent corrosion resistance and maintains excellent adhesion strength to an adherend even under severe conditions, and a method for producing the same. A corrosion-resistant magnet of the present invention as a means for achieving the object is characterized by comprising a chemical conversion film containing at least Zr, V, Al, fluorine, and oxygen as constituent elements and not containing phosphorus over a surface of an R—Fe—B based sintered magnet with a film made of Al or an alloy thereof therebetween.

Abstract translation: 本发明的目的在于提供即使在苛刻条件下也能显示出优良的耐腐蚀性和对被粘物的粘合强度优异的R-Fe-B系烧结磁铁及其制造方法。 作为实现该目的的手段的本发明的耐腐蚀磁体的特征在于，包括至少含有Zr，V，Al，氟和氧作为构成元素并且在R表面上不含磷的化学转化膜 -Fe-B系烧结磁体，其中由Al制成的膜或它们之间的合金。

公开(公告)号：US20130098509A1

公开(公告)日：2013-04-25

申请号：US13807111

申请日：2011-06-29

Applicant: Mahoro Fujihara ,  Koshi Yoshimura

Inventor： Mahoro Fujihara ,  Koshi Yoshimura

IPC: H01F41/00 ,  H01F1/01

CPC classification number: H01F41/005 ,  B22F2003/248 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C22C2202/02 ,  C23C8/10 ,  H01F1/01 ,  H01F1/0536 ,  H01F1/0577 ,  H01F41/026 ,  B22F2201/03 ,  B22F2201/05

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。

公开(公告)号：US20110186181A1

公开(公告)日：2011-08-04

申请号：US13002571

申请日：2009-06-30

Applicant: Toshinobu Niinae ,  Koshi Yoshimura ,  Koji Kamiyama

Inventor： Toshinobu Niinae ,  Koshi Yoshimura ,  Koji Kamiyama

IPC: H01F1/057 ,  C23C22/00

CPC classification number: H01F41/026 ,  B22F3/24 ,  B22F2003/241 ,  B22F2207/01 ,  C22C33/0278 ,  C22C38/00 ,  C22C2202/02 ,  C23C22/34 ,  H01F1/0577 ,  H01F7/0221 ,  Y10T428/12465

Abstract: An object of the present invention is to provide an R—Fe—B based sintered magnet having on a surface thereof a chemical conversion film with higher corrosion resistance than a conventional chemical conversion film such as a phosphate film, and a method for producing the same. The corrosion-resistant magnet of the present invention as a means for achieving the object is characterized by comprising a chemical conversion film containing at least Zr, Nd, fluorine, and oxygen as constituent elements and not containing phosphorus directly on a surface of an R—Fe—B based sintered magnet, wherein R is a rare-earth element including at least Nd.

Abstract translation: 本发明的目的是提供一种R-Fe-B系烧结磁体，其表面上具有比常规的磷酸盐膜化学转化膜更高的耐腐蚀性的化学转化膜及其制造方法 。 作为实现该目的的手段的本发明的耐腐蚀磁体的特征在于，包括至少含有Zr，Nd，氟和氧作为构成元素的化学转化膜，并且直接在R- Fe-B系烧结磁体，其中R是至少包括Nd的稀土元素。

公开(公告)号：US20100252145A1

公开(公告)日：2010-10-07

申请号：US12680312

申请日：2008-09-26

Applicant: Mahoro Fujihara ,  Koshi Yoshimura ,  Atsushi Kikugawa

Inventor： Mahoro Fujihara ,  Koshi Yoshimura ,  Atsushi Kikugawa

IPC: H01F1/055

CPC classification number: C23C8/16 ,  C23C8/12 ,  H01F1/0577 ,  H01F41/026

Abstract: An objective of the present invention is to provide a rare earth metal-based sintered magnet having imparted thereto sufficient corrosion resistance by an oxidative heat treatment, which is resistant even in an environment of fluctuating humidity, while suppressing the deterioration of the magnetic characteristics ascribed to the oxidative heat treatment, and to provide a method for producing the same. As a means of achieving the objective above, the surface-modified rare earth metal-based sintered magnet of the present invention is characterized in that the surface-modified part comprises a surface-modified layer comprising at least three layers formed in this order from the inner side of the magnet, a main layer containing R, Fe, B, and oxygen, an amorphous layer containing at least R, Fe, and oxygen, and an outermost layer containing iron oxide comprising mainly hematite as the constituent, and the method for producing the same is characterized in that it comprises a step of applying a heat treatment to a bulk magnet body in the temperature range of from 200° C. to 600° C., under an atmosphere with oxygen partial pressure in a range of from 1×102 Pa to 1×105 Pa and water vapor partial pressure in a range of from 0.1 Pa to 1000 Pa (exclusive of 1000 Pa).

Abstract translation: 本发明的目的是提供一种稀土金属基烧结磁体，其通过氧化热处理赋予其足够的耐腐蚀性，即使在湿度波动的环境中也具有耐受性，同时抑制归因于 氧化热处理，提供其制造方法。 作为实现上述目的的手段，本发明的表面改性稀土类金属类烧结磁体的特征在于，表面改性部分包括表面改性部分，该表面改性部分包括至少三层，从 磁体的内侧，含有R，Fe，B和氧的主层，至少含有R，Fe和氧的非晶层，以及含有主要以赤铁矿为主要成分的氧化铁的最外层，以及用于 其制造方法的特征在于，其包括在200℃至600℃的温度范围内在氧分压范围为1的气氛下对体磁体进行热处理的步骤 ×102Pa〜1×105Pa，水蒸气分压为0.1Pa〜1000Pa（不包括1000Pa）。

公开(公告)号：US20080286595A1

公开(公告)日：2008-11-20

申请号：US12092286

申请日：2007-03-01

Applicant: Koshi Yoshimura ,  Hideyuki Morimoto ,  Tomoori Odaka

Inventor： Koshi Yoshimura ,  Hideyuki Morimoto ,  Tomoori Odaka

IPC: B32B15/01 ,  C23C16/00 ,  B22F3/10 ,  C21D1/00

CPC classification number: H01F1/0577 ,  B22F7/062 ,  B22F2009/044 ,  B22F2998/10 ,  B22F2999/00 ,  H01F41/0293 ,  Y10T428/12028 ,  B22F9/04 ,  B22F3/02 ,  B22F3/10 ,  B22F2201/013 ,  B22F2202/05

Abstract: In a method for producing an R—Fe—B based rare-earth sintered magnet according to the present invention, first, provided is an R—Fe—B based rare-earth sintered magnet body including, as a main phase, crystal grains of an R2Fe14B type compound that includes a light rare-earth element RL, which is at least one of Nd and Pr, as a major rare-earth element R. Thereafter, the sintered magnet body is heated while a heavy rare-earth element RH, which is at least one element selected from the group consisting of Dy, Ho and Tb, is supplied to the surface of the sintered magnet body, thereby diffusing the heavy rare-earth element RH into the rare-earth sintered magnet body.

Abstract translation: 在本发明的R-Fe-B系稀土类烧结磁体的制造方法中，首先，提供作为主相的作为主相的R-Fe-B系稀土类烧结磁体， 包括作为主要稀土元素R 1的至少一种Nd和Pr的轻稀土元素RL的R 2 Fe 14 B型化合物 然后，在烧结磁体的表面供给从Dy，Ho，Tb等中选出的至少一种元素的重稀土类元素RH，对烧结磁体进行加热， 重稀土元素RH进入稀土烧结磁体。

公开(公告)号：US09175376B2

公开(公告)日：2015-11-03

申请号：US12680312

申请日：2008-09-26

Applicant: Mahoro Fujihara ,  Koshi Yoshimura ,  Atsushi Kikugawa

Inventor： Mahoro Fujihara ,  Koshi Yoshimura ,  Atsushi Kikugawa

IPC: H01F1/055 ,  C23C8/16 ,  C23C8/12 ,  H01F41/02 ,  H01F1/057

CPC classification number: C23C8/16 ,  C23C8/12 ,  H01F1/0577 ,  H01F41/026

Abstract: An objective of the present invention is to provide a rare earth metal-based sintered magnet having imparted thereto sufficient corrosion resistance by an oxidative heat treatment, which is resistant even in an environment of fluctuating humidity, while suppressing the deterioration of the magnetic characteristics ascribed to the oxidative heat treatment, and to provide a method for producing the same. As a means of achieving the objective above, the surface-modified rare earth metal-based sintered magnet of the present invention is characterized in that the surface-modified part comprises a surface-modified layer comprising at least three layers formed in this order from the inner side of the magnet, a main layer containing R, Fe, B, and oxygen, an amorphous layer containing at least R, Fe, and oxygen, and an outermost layer containing iron oxide comprising mainly hematite as the constituent, and the method for producing the same is characterized in that it comprises a step of applying a heat treatment to a bulk magnet body in the temperature range of from 200° C. to 600° C., under an atmosphere with oxygen partial pressure in a range of from 1×102 Pa to 1×105 Pa and water vapor partial pressure in a range of from 0.1 Pa to 1000 Pa (exclusive of 1000 Pa).

Abstract translation: 本发明的目的是提供一种稀土金属基烧结磁体，其通过氧化热处理赋予其足够的耐腐蚀性，即使在湿度波动的环境中也具有耐受性，同时抑制归因于 氧化热处理，提供其制造方法。 作为实现上述目的的手段，本发明的表面改性稀土类金属类烧结磁体的特征在于，表面改性部分包括表面改性部分，该表面改性部分包括至少三层，从 磁体的内侧，含有R，Fe，B和氧的主层，至少含有R，Fe和氧的非晶层，以及含有主要以赤铁矿为主要成分的氧化铁的最外层，以及用于 其制造方法的特征在于，其包括在200℃至600℃的温度范围内在氧分压范围为1的气氛下对体磁体进行热处理的步骤 ×102Pa〜1×105Pa，水蒸气分压为0.1Pa〜1000Pa（不包括1000Pa）。

公开(公告)号：US20120299676A1

公开(公告)日：2012-11-29

申请号：US13516798

申请日：2010-12-28

Applicant: Toshinobu Niinae ,  Koshi Yoshimura ,  Koji Kamiyama

Inventor： Toshinobu Niinae ,  Koshi Yoshimura ,  Koji Kamiyama

IPC: H01F1/053 ,  C23C22/05

CPC classification number: C23C22/34 ,  B22F9/04 ,  B22F2003/242 ,  B22F2009/042 ,  B22F2009/044 ,  B22F2998/10 ,  H01F1/0577 ,  H01F41/026 ,  B22F1/0055 ,  B22F9/023 ,  B22F3/087 ,  B22F3/101

Abstract: An object of the present invention is to provide an R—Fe—B based sintered magnet having on a surface thereof a chemical conversion film with higher corrosion resistance than a conventional chemical conversion film such as a phosphate film, and a method for producing the same. The R—Fe—B based sintered magnet having a chemical conversion film on the surface thereof of the present invention as a means for achieving the object is characterized by comprising a chemical conversion film on a surface of an R—Fe—B based sintered magnet wherein R is a rare-earth element including at least Nd, the chemical conversion film having a laminate structure including at least an inner layer that contains R, fluorine, and oxygen as constituent elements and an outer layer that is amorphous and contains Zr, Fe, and oxygen as constituent elements, provided that no phosphorus is contained in the film.

Abstract translation: 本发明的目的是提供一种R-Fe-B系烧结磁体，其表面上具有比常规的磷酸盐膜化学转化膜更高的耐腐蚀性的化学转化膜及其制造方法 。 在本发明的表面具有化学转化膜的R-Fe-B系烧结磁体作为实现目的的手段的特征在于，在R-Fe-B系烧结磁体的表面上包含化学转化膜 其中R是至少包括Nd的稀土元素，化学转化膜具有至少包含含有R，氟和氧的内层作为构成元素的层叠结构，以及非晶态并含有Zr，Fe ，氧作为构成元素，条件是膜中不含磷。

公开(公告)号：US08187392B2

公开(公告)日：2012-05-29

申请号：US12666323

申请日：2008-07-01

Applicant: Koshi Yoshimura ,  Hideyuki Morimoto ,  Tomoori Odaka

Inventor： Koshi Yoshimura ,  Hideyuki Morimoto ,  Tomoori Odaka

IPC: H01F1/057

CPC classification number: C22C38/005 ,  B22F3/24 ,  B22F2003/248 ,  B22F2999/00 ,  C22C33/0278 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0293 ,  B22F2207/01 ,  B22F2201/20

Abstract: In an R—Fe—B based rare-earth sintered magnet according to the present invention, at a depth of 20 μm under the surface of its magnet body, crystal grains of an R2Fe14B type compound have an (RL1-xRHx)2Fe14B (where 0.2≦x≦0.75) layer with a thickness of 1 nm to 2 μm in their outer periphery. In this case, the light rare-earth element RL is at least one of Nd and Pr, and the heavy rare-earth element RH is at least one element selected from the group consisting of Dy, Ho and Tb.

Abstract translation: 在根据本发明的R-Fe-B系稀土烧结磁体中，在其磁体表面的20μm深处，R2Fe14B型化合物的晶粒具有（RL1-xRHx）2Fe14B（其中 0.2＆nlE; x＆nlE; 0.75）层，其外周的厚度为1nm〜2μm。 在这种情况下，轻稀土元素RL是Nd和Pr中的至少一种，重稀土元素RH是选自Dy，Ho和Tb中的至少一种元素。

公开(公告)号：US08163106B2

公开(公告)日：2012-04-24

申请号：US12599145

申请日：2008-05-09

Applicant: Atsushi Kikugawa ,  Koshi Yoshimura ,  Yoshimi Tochishita ,  Masanao Kamachi ,  Nobuhiro Misumi

Inventor： Atsushi Kikugawa ,  Koshi Yoshimura ,  Yoshimi Tochishita ,  Masanao Kamachi ,  Nobuhiro Misumi

IPC: H01F1/057

CPC classification number: C23C14/226 ,  C23C14/14 ,  C23C14/246 ,  C23C14/505 ,  H01F1/0577 ,  H01F7/0221 ,  H01F41/026 ,  Y10T428/32 ,  Y10T428/325

Abstract: An R—Fe—B sinlered magnet having on the surface thereof a vapor deposited film of aluminum or an alloy thereof and a method for producing the same. The vapor deposited film of aluminum or an alloy thereof comprises a columnar crystalline structure grown broader from the surface of the R—Fe—B sintered magnet body outward to the outer surface, which has a part within a region defined in the thickness direction of the film as taken from the surface of the R—Fe—B sintered magnet to ⅓ of the film thickness, 5 to 30 intercrystalline gaps of 0.01 μm to 1 μm in width as counted per 10 μm length in the lateral direction of the film. The method comprises controlling the average film formation rate such that it is slower up to a predetermined point and then is speeded up later thereon.

Abstract translation: 在其表面上具有铝或其合金的气相沉积膜的R-Fe-B带状磁体及其制造方法。 铝或其合金的气相沉积膜包括从R-Fe-B烧结磁体的表面向外扩展到外表面的柱状晶体结构，该柱状晶体结构在沿着厚度方向限定的区域内具有一部分 从R-Fe-B烧结磁体的表面取得的薄膜为薄膜厚度的1/3，膜的横向方向每10μm长度计数为5〜30个晶间间隙，宽度为0.01〜1μm。 该方法包括控制平均成膜速率，使得其延迟到预定点，然后在其上加速。