公开(公告)号：US10650947B2

公开(公告)日：2020-05-12

申请号：US14636268

申请日：2015-03-03

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yosuke Horiuchi ,  Shinya Sakurada ,  Keiko Okamoto ,  Masaya Hagiwara ,  Tsuyoshi Kobayashi ,  Masaki Endo ,  Tadahiko Kobayashi ,  Naoyuki Sanada

IPC: H01F1/055 ,  H02K1/02 ,  H01F1/053 ,  C22C1/04 ,  C22F1/10 ,  H02K1/27 ,  C22C19/07 ,  C22C30/02 ,  H01F1/059 ,  B22F9/04 ,  B22F9/08

Abstract: 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.

公开(公告)号：US20200090844A1

公开(公告)日：2020-03-19

申请号：US16283876

申请日：2019-02-25

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Masaya Hagiwara ,  Shinya Sakurada ,  Keiko Okamoto

IPC: H01F1/057 ,  H02K1/02 ,  H02K1/27 ,  H02K7/18 ,  H02K7/00 ,  H02K1/17 ,  F01D15/02 ,  F01D15/10

Abstract: 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.

公开(公告)号：US10573437B2

公开(公告)日：2020-02-25

申请号：US13747942

申请日：2013-01-23

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yosuke Horiuchi ,  Shinya Sakurada ,  Tsuyoshi Kobayashi ,  Keiko Okamoto ,  Masaya Hagiwara

IPC: H01F1/01 ,  H01F1/055 ,  C22C1/02

Abstract: 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 %.

公开(公告)号：US20190189315A1

公开(公告)日：2019-06-20

申请号：US16283936

申请日：2019-02-25

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Masaya Hagiwara ,  Shinya Sakurada ,  Naoyuki Sanada ,  Keiko Okamoto

IPC: H01F1/055 ,  H02K7/00 ,  H02K7/18 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/00

CPC classification number: 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

Abstract: 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.

公开(公告)号：US20180144850A1

公开(公告)日：2018-05-24

申请号：US15688974

申请日：2017-08-29

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Keiko Okamoto ,  Yosuke Horiuchi ,  Shinya Sakurada ,  Makoto Matsushita ,  Norio Takahashi ,  Toshio Hasebe ,  Tadashi Tokumasu

IPC: H01F1/053 ,  H02K1/02 ,  H02K7/18

CPC classification number: 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

Abstract: 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.

公开(公告)号：US09299486B2

公开(公告)日：2016-03-29

申请号：US13799335

申请日：2013-03-13

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Shinya Sakurada ,  Yosuke Horiuchi ,  Tsuyoshi Kobayashi ,  Keiko Okamoto ,  Masaya Hagiwara ,  Makoto Matsushita ,  Masaki Endo

IPC: H01F1/10 ,  H02K1/02 ,  H01F1/055

CPC classification number: H01F1/10 ,  H01F1/055 ,  H02K1/02

Abstract: In one embodiment, a permanent magnet includes a magnet main body and a surface portion provided on a surface of the magnet main body. The magnet main body has a composition expressed by a composition formula 1: R(Fep1Mq1Cur1Co1-p1-q1-r1)z1. The surface portion has a composition expressed by a composition formula 2: R(Fep2Mq2Cur2Co1-p2-q2-r2)z2. In the composition formulas 1 and 2, R is at least one element selected from rare earth elements, M is at least one element selected from Ti, Zr and Hf, p1 and p2 are 0.25 to 0.45, q1 and q2 are 0.01 to 0.05, r1 and r2 are 0.01 to 0.1, z1 is 6 to 9, and z2 satisfies 0.8≦z2/z1≦0.995.

Abstract translation: 在一个实施例中，永磁体包括磁体主体和设置在磁体主体的表面上的表面部分。 磁体主体具有由组成式1表示的组成：R（Fep1Mq1Cur1Co1-p1-q1-r1）z1。 表面部分具有由组成式2表示的组成：R（Fep2Mq2Cur2Co1-p2-q2-r2）z2。 在组成式1和2中，R为选自稀土元素中的至少一种元素，M为选自Ti，Zr和Hf中的至少一种元素，p1和p2为0.25〜0.45，q1和q2为0.01〜0.05， r1和r2为0.01〜0.1，z1为6〜9，z2满足0.8＆nlE; z2 / z1＆nlE; 0.995。

公开(公告)号：US20130241682A1

公开(公告)日：2013-09-19

申请号：US13747942

申请日：2013-01-23

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yosuke Horiuchi ,  Shinya Sakurada ,  Tsuyoshi Kobayashi ,  Keiko Okamoto ,  Masaya Hagiwara

IPC: H01F1/01

CPC classification number: H01F1/015 ,  C22C1/02 ,  H01F1/0557

Abstract: 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 %.

Abstract translation: 在一个实施例中，永磁体包括：由RpFeqMrCusCo100-pqrs表示的组成（R是稀土元素，M是选自Zr，Ti和Hf中的至少一种元素，10.8％ q @ 40 at％，0.88 @ r @ 7.2 at％，3.5 @ s @ 13.5 at％）; 以及包括具有Th2Zn17结晶相的电池相和细胞壁相的金属结构。 细胞壁相中的Cu浓度在30at％至70at％的范围内。

公开(公告)号：US10770208B2

公开(公告)日：2020-09-08

申请号：US14661122

申请日：2015-03-18

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yosuke Horiuchi ,  Shinya Sakurada ,  Keiko Okamoto ,  Masaya Hagiwara ,  Tsuyoshi Kobayashi ,  Masaki Endo ,  Tadahiko Kobayashi ,  Naoyuki Sanada

IPC: H01F1/055 ,  C22C1/04 ,  C22C19/07 ,  C22C30/02 ,  H02K1/02 ,  B22F9/08 ,  B22F9/04 ,  H01F7/02

Abstract: A high performance permanent magnet is provided. The permanent magnet includes a composition represented by a composition formula: RpFeqMrCutCo100-p-q-r-t, and a metallic structure including cell phases having a Th2Zn17 crystal phase and Cu-rich phases having higher Cu concentration than the cell phases. An average diameter of the cell phases is 220 nm or less, and in a numeric value range from a minimum diameter to a maximum diameter of the cell phases, a ratio of a number of cell phases having a diameter in a numeric value range of less than upper 20% from the maximum diameter is 20% or less of all the cell phases.

公开(公告)号：US20190295751A1

公开(公告)日：2019-09-26

申请号：US16114657

申请日：2018-08-28

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Masaya Hagiwara ,  Shinya Sakurada ,  Keiko Okamoto

IPC: H01F1/057 ,  H02K1/02 ,  H02K7/00 ,  H02K7/18 ,  C22C38/00

Abstract: A permanent magnet comprises a plurality of crystal grains having a main phase of an R-Fe-B magnetic phase, R being at least one element selected from the group consisting of Nd, Pr, Dy, Tb, and Ho. A grain size distribution of the crystal grains satisfies a formula: d10

公开(公告)号：US10102950B2

公开(公告)日：2018-10-16

申请号：US14034618

申请日：2013-09-24

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Yosuke Horiuchi ,  Shinya Sakurada ,  Keiko Okamoto ,  Masaya Hagiwara

IPC: H01F7/02 ,  H01F1/053 ,  H01F41/02 ,  B22F3/24 ,  H01F1/08 ,  C22C1/04 ,  C22C33/02 ,  H01F1/055

Abstract: According to one embodiment, a permanent magnet is provided with a sintered body having a composition represented by R(FepMqCurCo1-p-q-r)zOw (where, R is at least one element selected from rare-earth elements, M is at least one element selected from Ti, Zr and Hf, and p, q, r, z and w are numbers satisfying 0.25≤p≤0.6, 0.005≤q≤0.1, 0.01≤r≤0.1, 4≤z≤9 and 0.005≤w≤0.6 in terms of atomic ratio). The sintered body has therein aggregates of oxides containing the element R dispersed substantially uniformly.