公开(公告)号：US20210375515A1

公开(公告)日：2021-12-02

申请号：US17219995

申请日：2021-04-01

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Yukio TAKADA

IPC: H01F1/057 ,  H01F41/02 ,  B22F9/04 ,  C22C38/00 ,  C22C38/10 ,  C22C38/16 ,  C22C38/06

Abstract: To provide an R—Fe—B-based rare earth magnet excellent in the squareness and magnetic properties at high temperatures, and a production method thereof.
The present disclosure provides a rare earth magnet including a main phase 10 and a grain boundary phase 20 present. The overall composition of the rare earth magnet of the present disclosure is represented, in terms of molar ratio, by the formula: (R1(1-x)Lax)y(Fe(1-z)Coz)(100-y-w-v)BwM1v, wherein R1 is one or more predetermined rare earth elements, and M1 is one or more predetermined elements, and wherein 0.02≤x≤0.1, 12.0≤y≤20.0, 0.1≤z≤0.3, 5.0≤w≤20.0, and 0≤v≤2.0. The main phase 10 has an R2Fe14B-type crystal structure, the average particle diameter of the main phase 10 is from 1 to 10 μm, and the volume ratio of a phase having an RFe2-type crystal structure in the grain boundary phase 20 is 0.60 or less relative to the grain boundary phase 20.

公开(公告)号：US20200098496A1

公开(公告)日：2020-03-26

申请号：US16576215

申请日：2019-09-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  TOHOKU UNIVERSITY

Inventor： Akihito KINOSHITA ,  Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Daisuke ICHIGOZAKI ,  Tatsuhiko HIRANO ,  Kazuaki HAGA ,  Yukio TAKADA ,  Satoshi SUGIMOTO ,  Masashi MATSUURA

IPC: H01F1/059 ,  H01F41/02 ,  B22F3/24 ,  C22C18/02 ,  C22C38/00

Abstract: To provide a rare earth magnet in which particles of SmFeN powder are bound using a Zn alloy powder, wherein generation of a knick at a magnetic field of around 0 is prevented, and a production method thereof.A rare earth magnet including a main phase containing Sm, Fe, and N, at least a part of the main phase having a Th2Zn17-type or Th2Ni17-type crystal structure, a sub-phase containing at least either Si or Sm, and Zn and Fe and being present around the main phase, and an intermediate phase containing Sm, Fe and N as well as Zn and being present between the main phase and the sub-phase, wherein the average Fe content in the sub-phase is 33 at % or less relative to the whole sub-phase, and the average total content of Si and Sm in the sub-phase is from 1.4 to 4.5 at % relative to the whole subs-phase.

公开(公告)号：US20200036322A1

公开(公告)日：2020-01-30

申请号：US16460100

申请日：2019-07-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Noritsugu SAKUMA ,  Masao YANO ,  Masaaki ITO ,  Tetsuya SHOJI ,  Hidefumi KISHIMOTO ,  Akira KATO

IPC: H02P29/66 ,  H01F7/02 ,  H02P3/06

Abstract: To provide a motor control method ensuring that dragging loss at the time of high rotation can be reduced.A motor control method, wherein a composite permanent magnet has a core part and a shell part, the Curie temperature of one of the core part and the shell part is Tc1 K, and the Curie temperature of another is Tc2 K, and wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at Ts K that is (Tc1−100) K or higher and lower than Tc2 K and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature Ts K or Tc1 K, whichever is lower.

公开(公告)号：US20160314899A1

公开(公告)日：2016-10-27

申请号：US15104369

申请日：2014-12-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Daisuke SAKUMA ,  Kazuaki HAGA

IPC: H01F41/02 ,  B22F3/16 ,  C22C38/00 ,  C22C38/16 ,  C22C38/06 ,  H01F1/057 ,  B22F1/00

CPC classification number: H01F41/0266 ,  B22F1/0003 ,  B22F3/16 ,  B22F2003/248 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/16 ,  H01F1/057 ,  H01F1/0577 ,  H01F41/0293

Abstract: A method includes: manufacturing a sintered compact represented by (Rl)x(Rh)yTzBsMt and has a grain boundary phase; manufacturing a rare earth magnet precursor from the sintered compact; and performing a heat treatment on the rare earth magnet precursor at 450° C. to 700° C. to diffuse and to infiltrate a melt of a modified alloy containing a light rare earth element and either a transition metal element, Al, In, Zn, or Ga into the grain boundary phase. Rl represents a light rare earth element. Rh represents Dy or Tb. T represents a transition metal containing at least one of Fe, Ni, and Co. B represents boron. M represents at Ga, Al, or Cu. x, y, z, s, and t represent mass % of Rl, Rh, T, B, and M. Following expressions are established: 27≦x≦44, 0≦y≦10, z=100−x−y−s−t, 0.75≦s≦3.4, 0≦t≦3. An infiltration amount of the modified alloy is 0 mass % to 5 mass %.

Abstract translation: 一种方法包括：制造由（R1）x（Rh）yTzBsMt表示的烧结体，并具有晶界相; 从烧结体制造稀土磁体前体; 并在450〜700℃下对稀土类磁体前驱体进行热处理，以扩散和渗透含有轻稀土元素和过渡金属元素Al，In，Zn的改性合金的熔体 ，或Ga进入晶界相。 R1表示轻稀土元素。 Rh表示Dy或Tb。 T表示含有Fe，Ni和Co中的至少一种的过渡金属.B表示硼。 M表示Ga，Al或Cu。 x，y，z，s和t表示R1，Rh，T，B和M的质量％。以下表达式建立：27≤x≤44,0≤y≤10，z = 100-x-y- s-t，0.75≤s≤3.4,0≤t≤3。 改性合金的渗透量为0质量％〜5质量％。

公开(公告)号：US20150228386A1

公开(公告)日：2015-08-13

申请号：US14610229

申请日：2015-01-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Kazuaki HAGA

IPC: H01F1/057 ,  B22F3/26 ,  B22F3/10 ,  B22F3/24 ,  H01F41/02 ,  H01F1/055

CPC classification number: H01F1/0577 ,  B22F3/10 ,  B22F3/24 ,  B22F3/26 ,  C22C38/002 ,  C22C38/005 ,  C22C38/10 ,  H01F1/0557 ,  H01F41/0266 ,  H01F41/0293

Abstract: The present invention is a method capable of producing a rare-earth magnet with excellent magnetization and coercivity. The method includes producing a sintered body including a main phase and grain boundary phase and represented by (R11-xR2x)aTMbBcMd (where R1 represents one or more rare-earth elements including Y, R2 represents a rare-earth element different than R1, TM represents transition metal including at least one of Fe, Ni, or Co, B represents boron, M represents at least one of Ti, Ga, Zn, Si, Al, etc., 0.01≦x≦1, 12≦a≦20, b=100−a−c−d, 5≦c≦20, and 0≦d≦3 (all at %)); applying hot deformation processing to the sintered body to produce a precursor of the magnet; and diffusing/infiltrating melt of a R3-M modifying alloy (rare-earth element where R3 includes R1 and R2) into the grain boundary phase of the precursor.

Abstract translation: 本发明是能够制造具有优异的磁化强度和矫顽力的稀土类磁体的方法。 该方法包括制备包括主相和晶界相并由（R11-xR2x）aTMbBcMd（其中R1表示一种或多种包括Y的稀土元素，R2表示不同于R1的稀土元素，TM 表示包含Fe，Ni或Co中的至少一种的过渡金属，B表示硼，M表示Ti，Ga，Zn，Si，Al等中的至少一种，0.01和n 1; x和n 1; 12和n 11; ，b = 100-a-c-d，5＆nlE; c＆nlE; 20和0＆nlE; d＆nlE; 3（全部为％））; 对烧结体进行热变形处理以制造磁体的前体; 并将R3-M改性合金（其中R3包含R1和R2的稀土元素）的扩散/渗透熔体引入前体的晶界相。

公开(公告)号：US20240355516A1

公开(公告)日：2024-10-24

申请号：US18631689

申请日：2024-04-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tetsuya SHOJI ,  Noritsugu SAKUMA ,  Akihito KINOSHITA

IPC: H01F1/059

CPC classification number: H01F1/0596

Abstract: A Sm—Fe—N-based magnetic material capable of enhancing saturation magnetization while suppressing a decrease in the anisotropic magnetic field as much as possible even when the use amount of Sm is reduced, and a production method thereof, are provided.
The magnetic material of the present disclosure includes a main phase having a predetermined crystal structure. The composition of the main phase is represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh, where R1 is a given rare earth element, etc. M is a given element, and 0.25≤x+y≤0.73, 0.25≤x≤0.73, x/(x+y)≥0.80, 0≤z≤0.10, 0.10≤p+q≤0.53, p+q≥1.45(x+y)−0.5485, 0≤s≤0.10 and 2.9≤h≤3.3 are satisfied. The production method of the present disclosure includes nitriding a precursor including a crystal phase having a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17.

公开(公告)号：US20240160697A1

公开(公告)日：2024-05-16

申请号：US18373625

申请日：2023-09-27

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masato HOZUMI ,  Masao YANO ,  Tetsuya SHOJI

IPC: G06F18/2135

CPC classification number: G06F18/2135

Abstract: An information processing device, that acquires, from a plurality of user terminals, measurement data measured by a plurality of analytical method; quantifies the acquired measurement data using a predetermined statistical method; and displays, on a display of at least one user terminal of the plurality of user terminals, a necessary analytical method among the plurality of analytical method based on results of the quantification.

公开(公告)号：US20220301753A1

公开(公告)日：2022-09-22

申请号：US17578856

申请日：2022-01-19

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Akihito KINOSHITA ,  Akira KATO

IPC: H01F1/057 ,  H01F41/02 ,  C22C38/10 ,  C22C38/00

Abstract: A rare earth magnet in which the amount used of a heavy rare earth element is more reduced while maintaining enhancement of the coercive force, and a producing method thereof are provided.
The rare earth magnet of the present disclosure has a main phase 10 and a grain boundary phase 20. The main phase 10 has a composition represented by R12T14B. The main phase 10 has a core part 12 and a shell part 14. Denoting the abundances of R2 and Ce (R2 is heavy rare earth element) occupying 4f site of the shell part 14 as R24f and Ce4f, respectively, and denoting the abundances of R2 and Ce occupying 4g site of the shell part 14 as R24g and Ce4g, respectively, the rare earth magnet satisfies 0.44≤R24g/(R24f+R24g)≤0.70 and 0.04≤(Ce4f+Ce4g)/(R24f+R24g). The rare earth magnet-producing method of the present disclosure uses a modifier containing at least R2 and Ce.

公开(公告)号：US20220101543A1

公开(公告)日：2022-03-31

申请号：US17480390

申请日：2021-09-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hirotaka SAKAMOTO ,  Masao YANO ,  Tetsuya SHOJI

IPC: G06T7/37 ,  G06K9/62

Abstract: An information processing device acquires an image captured by a transmission electron microscope. The information processing device, for each partial region in the image, executes a two-dimensional Fourier transform on an image of the partial region. The information processing device, based on results obtained by executing the two-dimensional Fourier transform on each of the partial regions, performs clustering of frequency strengths obtained from the results of the two-dimensional Fourier transform. The information processing device determines regions of different crystallinity in the image, based on results of the clustering.

公开(公告)号：US20220093297A1

公开(公告)日：2022-03-24

申请号：US17475944

申请日：2021-09-15

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Daisuke ICHIGOZAKI ,  Tetsuya SHOJI ,  Noritsugu SAKUMA ,  Akihito KINOSHITA ,  Masaaki ITO

IPC: H01F1/059 ,  H01F41/02 ,  C22C38/10 ,  C22C38/00 ,  C23C8/26

Abstract: An Sm-Fe-N-based magnetic material according to the present disclosure includes a main phase having a predetermined crystal structure. The main phase has a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh (where, R1 is predetermined rare earth elements and the like, M is predetermined elements and the like, and 0.04≤x+y≤0.50, 0≤z≤0.10, 0≤p+q≤0.10, 0≤s≤0.10, and 2.9≤h≤3.1 are satisfied). A crystal volume of the main phase is 0.833 nm3 to 0.840 nm3. A manufacturing method of the Sm-Fe-N-based magnetic material according to the present disclosure includes nitriding a magnetic material precursor including a crystal phase having a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17.