公开(公告)号：US20200070241A1

公开(公告)日：2020-03-05

申请号：US16677755

申请日：2019-11-08

Applicant: DENSO CORPORATION

Inventor： Yuta SAIGA ,  Sho GOTO ,  Ryota SHINOZAKI ,  Hiroaki KURA ,  Eiji WATANABE

IPC: B22F1/00 ,  H01F1/047 ,  C08K9/02 ,  C08K3/08 ,  B22F1/02 ,  C22C19/03

Abstract: A magnetic powder is provided. The magnetic powder includes a main body portion including an L10-FeNi. The magnetic powder further includes an oxide layer formed on a surface of the main body portion. A magnet is also provided. The magnet includes a base material. The magnet further includes the magnetic powder dispersed in the base material.

公开(公告)号：US20230099171A1

公开(公告)日：2023-03-30

申请号：US17950431

申请日：2022-09-22

Applicant: DENSO CORPORATION ,  NICHIA CORPORATION

Inventor： Hiroaki KURA ,  Takahiro NISHIO ,  Eiji WATANABE ,  Yoshiaki HAYASHI ,  Takayuki YAMAMOTO ,  Hisashi MAEHARA ,  Takanori MATSUNO

IPC: C22C38/08 ,  C23C8/26 ,  C22C38/00

Abstract: An L10 type iron-nickel (FeNi) ordered alloy has an L10 type ordered structure and contains sulfur. The L10 type FeNi ordered alloy may have a sulfur content in a range from 0.01% by mass to 10% by mass. A manufacturing method of an L10 type FeNi ordered alloy includes performing a nitriding treatment to an FeNi alloy containing sulfur to obtain a nitride containing Fe and Ni.

公开(公告)号：US20210062280A1

公开(公告)日：2021-03-04

申请号：US17097085

申请日：2020-11-13

Applicant: DENSO CORPORATION

Inventor： Hiroaki KURA ,  Sho GOTO ,  Yasushi HAYASHI

IPC: C21D3/08 ,  C23C8/26 ,  C23C8/80 ,  C22C19/03 ,  C22C1/04 ,  H01F1/06 ,  B22F1/00 ,  C22C30/00 ,  C22C38/08

Abstract: A method for manufacturing FeNi ordered alloy having a L10 type order structure is provided. After a nitrification process for nitriding a powder sample (100) of a FeNi disordered alloy arranged in a tube furnace (10) is performed using a NH3 gas, a de-nitrification process for removing a nitrogen from the FeNi disordered alloy which is processed by the nitrification process is performed using a H2 gas. Thus, the L10 type FeNi ordered alloy with a regularity defined by S equal to or higher than 0.5 is obtained.

公开(公告)号：US20200325551A1

公开(公告)日：2020-10-15

申请号：US16914685

申请日：2020-06-29

Applicant: DENSO CORPORATION

Inventor： Hiroaki KURA ,  Sho GOTO ,  Yasushi HAYASHI

IPC: C21D3/08 ,  C23C8/26 ,  C23C8/80 ,  C22C19/03 ,  C22C1/04 ,  H01F1/06 ,  B22F1/00 ,  C22C30/00 ,  C22C38/08

Abstract: A method for manufacturing FeNi ordered alloy having a L10 type order structure is provided. After a nitrification process for nitriding a powder sample of a FeNi disordered alloy arranged in a tube furnace is performed using a NH3 gas, a de-nitrification process for removing a nitrogen from the FeNi disordered alloy which is processed by the nitrification process is performed using a H2 gas. Thus, the L10 type FeNi ordered alloy with a regularity defined by S equal to or higher than 0.5 is obtained.

公开(公告)号：US20180251867A1

公开(公告)日：2018-09-06

申请号：US15760748

申请日：2016-09-23

Applicant: DENSO CORPORATION

Inventor： Hiroaki KURA ,  Sho GOTO ,  Yasushi HAYASHI

IPC: C21D3/08 ,  B22F1/00 ,  C23C8/26 ,  C23C8/80 ,  C22C38/08 ,  C22C19/03

Abstract: A method for manufacturing FeNi ordered alloy having a L10 type order structure is provided. After a nitrification process for nitriding a powder sample of a FeNi disordered alloy arranged in a tube furnace is performed using a NH3 gas, a de-nitrification process for removing a nitrogen from the FeNi disordered alloy which is processed by the nitrification process is performed using a H2 gas. Thus, the L10 type FeNi ordered alloy with a regularity defined by S equal to or higher than 0.5 is obtained.

公开(公告)号：US20210277506A1

公开(公告)日：2021-09-09

申请号：US17327026

申请日：2021-05-21

Applicant: DENSO CORPORATION

Inventor： Ryota SHINOZAKI ,  Hiroaki KURA

IPC: C22C38/08 ,  C23C8/26 ,  C23C8/80 ,  B22F1/00 ,  B22F1/02 ,  B22F3/11 ,  H01F1/08 ,  H01F1/047

Abstract: A FeNi ordered alloy includes a plurality of particles having a L10 type ordered structure. A size of the particles is in a range between 200 nm and 500 nm. A volume fraction of a pore in the particles with respect to a volume of the particles having an unit of vol. % is 5% or less.

公开(公告)号：US20200071811A1

公开(公告)日：2020-03-05

申请号：US16674132

申请日：2019-11-05

Applicant: DENSO CORPORATION

Inventor： Eiji WATANABE ,  Yuta SAIGA ,  Hidehiko HIRAMATSU ,  Sho GOTO ,  Ryota SHINOZAKI ,  Hiroaki KURA

IPC: C23C8/26 ,  C22C38/08 ,  C22C38/00 ,  H01F1/047

Abstract: An FeNi ordered alloy contained in a magnetic material has an L10 ordered structure, is doped with an light element, and is provided as a granular particle. A method for manufacturing a magnetic material including an FeNi ordered alloy having an L10 ordered structure includes preparing an FeNi ordered alloy provided as a granular particle, and doping a light element into the FeNi ordered alloy.

公开(公告)号：US20200066430A1

公开(公告)日：2020-02-27

申请号：US16672865

申请日：2019-11-04

Applicant: DENSO CORPORATION

Inventor： Hiroaki KURA ,  Eiji WATANABE ,  Masane KIN ,  Kenta OSANAI

IPC: H01F1/055 ,  B22F1/00

Abstract: An L10-FeNi magnetic powder has an average particle size of 50 nm to 1 μm, and an average value of sphericity P of 0.9 or more. The sphericity P is defined as P=Ls/Lr, where Lr is a perimeter of an L10-FeNi magnetic powder particle on an image of a microscope, and Ls is a perimeter of a perfect circle that has a same area as the L10-FeNi magnetic powder particle on the image for which Lr is calculated.