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公开(公告)号：US11676747B2
公开(公告)日：2023-06-13
申请号：US17375064
申请日：2021-07-14
IPC分类号： H01F1/055 , B22F3/24 , C22C38/16 , C22C38/14 , C22C38/10 , H01F41/02 , C22C38/00 , C22C19/07
CPC分类号： H01F1/0557 , B22F3/24 , B22F2003/248 , B22F2998/10 , B22F2999/00 , C22C19/07 , C22C38/005 , C22C38/10 , C22C38/14 , C22C38/16 , H01F41/0266 , B22F2999/00 , B22F3/1007 , B22F2201/20 , B22F2998/10 , B22F9/04 , B22F2009/044 , B22F3/02 , B22F3/1007 , B22F2003/248 , B22F3/1028
摘要： A permanent magnet is expressed by a composition formula: RpFeqMrCusCo100-p-q-r-s. The magnet includes a crystal grain having a main phase including a TbCu7 crystal phase, and a volume ratio of the TbCu7 crystal phase to the main phase is 95% or more.
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公开(公告)号：US20220109336A1
公开(公告)日：2022-04-07
申请号：US17412321
申请日：2021-08-26
发明人： Masaya Hagiwara , Shinya Sakurada
摘要： A magnet material is represented by a formula: RxDyBesBtM100-x-y-t (R is at least one element selected from a group consisting of rare-earth elements, D is at least one element selected from a group consisting of Nb, Ti, Zr, Ta, and Hf, and M is at least one element selected from a group consisting of Fe and Co, and when a total number of elements obtained by adding R, D, B, and M is set to 100, x is a number satisfying 4.0
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公开(公告)号：US10951074B2
公开(公告)日：2021-03-16
申请号：US15437474
申请日：2017-02-21
IPC分类号： H01F1/055 , B22F9/04 , B22F3/16 , B22F3/24 , H02K1/02 , C22C19/07 , C22C1/02 , B22D7/00 , B22D25/06 , C22C30/02 , C22F1/10 , H02K1/27 , H02K7/00 , H02K7/18 , H01F1/059
摘要： A permanent magnet is expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t. The magnet comprises a metal structure including a main phase having a Th2Zn17 crystal phase and a grain boundary phase. The main phase includes a cell phase having the Th2Zn17 crystal phase and a Cu-rich phase. A section including a c-axis of the Th2Zn17 crystal phase has a first region in the crystal grain and a second region in the crystal grain, the first region is provided in the cell phase divided by the Cu-rich phase, the second region is provided within a range of not less than 50 nm nor more than 200 nm from the grain boundary phase in a direction perpendicular to an extension direction of the grain boundary phase, and a difference between a Cu concentration of the first region and a Cu concentration of the second region is 0.5 atomic percent or less.
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公开(公告)号：US10923255B2
公开(公告)日：2021-02-16
申请号：US16283857
申请日：2019-02-25
发明人： Naoyuki Sanada , Masaya Hagiwara , Shinya Sakurada
IPC分类号： H01F1/055 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/14 , C22C38/16 , H02K7/00 , H02K7/18 , H01F1/059
摘要： A magnetic material is expressed by a composition formula: (R1-xZx)aMbTc, and includes a main phase having a ThMn12 crystal structure. In the ThMn12 crystal structure, when an amount of the element Z occupying 2a site is Z2a atomic percent, an amount of the element Z occupying 8i site is Z8i atomic percent, an amount of the element Z occupying 8j site is Z8j atomic percent, and an amount of the element Z occupying 8f site is Z8f atomic percent, Z2a, Z8i, Z8j, and Z8f satisfy (Z8i+Z8j+Z8f)/(Z2a+Z8i+Z8j+Z8f)
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公开(公告)号：US10650947B2
公开(公告)日：2020-05-12
申请号：US14636268
申请日：2015-03-03
发明人： Yosuke Horiuchi , Shinya Sakurada , Keiko Okamoto , Masaya Hagiwara , Tsuyoshi Kobayashi , Masaki Endo , Tadahiko Kobayashi , Naoyuki Sanada
IPC分类号： H01F1/055 , H02K1/02 , H01F1/053 , C22C1/04 , C22F1/10 , H02K1/27 , C22C19/07 , C22C30/02 , H01F1/059 , B22F9/04 , B22F9/08
摘要： The invention provides a high-performance permanent magnet. The permanent magnet has a composition that is expressed by a composition formula RpFeqMrCutCo100-p-q-r-t, where R is at least one element selected from a rare earth element, M is at least one element selected from the group consisting of Zr, Ti, and Hf, p is a number satisfying 10.8≤p≤12.5 atomic percent, q is a number satisfying 25≤q≤40 atomic percent, r is a number satisfying 0.88≤r≤4.5 atomic percent, and t is a number satisfying 3.5≤t≤13.5 atomic percent. The permanent magnet also has a metallic structure that includes a main phase having a Th2Zn17 crystal phase, and a Cu-M rich phase having a higher Cu concentration and a higher M concentration than the main phase.
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公开(公告)号：US20200090844A1
公开(公告)日：2020-03-19
申请号：US16283876
申请日：2019-02-25
发明人： Masaya Hagiwara , Shinya Sakurada , Keiko Okamoto
摘要： A permanent magnet comprises crystal grains each including a main phase. An average size of the crystal grains is 1.0 μm or less, and a degree of orientation of easy magnetization axes of the crystal grains to an easy magnetization axis of the magnet is 15% or more and 90% or less. A recoil magnetic permeability is 1.13 or more, a residual magnetization is 0.8 T or more and less than 1.16 T, and an intrinsic coercive force is 850 kA/m or more.
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公开(公告)号：US10573437B2
公开(公告)日：2020-02-25
申请号：US13747942
申请日：2013-01-23
摘要： In one embodiment, a permanent magnet includes: a composition expressed by RpFeqMrCusCo100-p-q-r-s (R is a rare-earth element, M is at least one element selected from Zr, Ti, and Hf, 10.8≤p≤13.5 at %, 28≤q≤40 at %, 0.88≤r≤7.2 at %, and 3.5≤s≤13.5 at %); and a metallic structure including a cell phase having a Th2Zn17 crystal phase, and a cell wall phase. A Cu concentration in the cell wall phase is in a range from 30 at % to 70 at %.
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公开(公告)号：US20190189315A1
公开(公告)日：2019-06-20
申请号：US16283936
申请日：2019-02-25
CPC分类号： H01F1/055 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C2202/02 , H01F1/0557 , H01F1/0593 , H02K7/003 , H02K7/1823
摘要： A magnetic material is expressed by a composition formula 1: (R1-xYx)aMbTcDd. The magnetic material includes: a main phase having a ThMn12 crystal phase, and a sub phase having a phase containing the element D.
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公开(公告)号：US20190189313A1
公开(公告)日：2019-06-20
申请号：US16283856
申请日：2019-02-25
发明人： Naoyuki Sanada , Shinya Sakurada
CPC分类号： H01F1/053 , B22F3/162 , C22C38/001 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/18 , C22C38/28 , C22C2202/02 , H01F1/0551 , H01F1/0557 , H01F1/059 , H01F1/0596 , H02K7/003
摘要： The permanent magnet includes: a main phase expressed by a composition formula: RMZNX and having at least one crystal structure selected from the group consisting of a Th2Ni17 crystal structure, a Th2Zn17 crystal structure, and a TbCu7 crystal structure; and a sub phase having a phosphorus compound phase containing a phosphorus compound excluding a phosphoric acid compound.
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公开(公告)号：US20180144850A1
公开(公告)日：2018-05-24
申请号：US15688974
申请日：2017-08-29
发明人： Keiko Okamoto , Yosuke Horiuchi , Shinya Sakurada , Makoto Matsushita , Norio Takahashi , Toshio Hasebe , Tadashi Tokumasu
CPC分类号： H01F1/0557 , B22F2998/10 , B22F2999/00 , C22C1/02 , C22C19/07 , C22C30/00 , C22C38/005 , C22C38/10 , C22C38/14 , C22C38/16 , C22C2202/02 , H01F1/086 , H01F41/0266 , B22F9/04 , B22F9/082 , B22F2009/043 , B22F3/02 , B22F3/1007 , B22F2202/05 , B22F2201/10
摘要： A permanent magnet is expressed by a composition formula: RpFeqMrCutCo100-p-q-r-t. The magnet includes: a crystal grain including a matrix; and a grain boundary phase. The matrix has cell phase having a Th2Zn17 crystal phase, a cell wall phase dividing the cell phase, and a plurality of Cu high-concentration phases. An area ratio of Cu high-concentration phases to the matrix is not less than 0.2% nor more than 5.0%. In a 3 μm radius circle centered at a center of gravity of at least one of the Cu high-concentration phases, an average number of other Cu high-concentration phases is not less than 3 nor more than 15.
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