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：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：US20200010938A1

公开(公告)日：2020-01-09

申请号：US16574514

申请日：2019-09-18

Applicant: DENSO CORPORATION

Inventor： Sho GOTO

IPC: C22C38/08 ,  C22C1/04 ,  C21D3/08 ,  H01F1/06

Abstract: An FeNi ordered alloy has an L10 ordered structure, a mean order degree of 0.4 or more throughout a material, and a coercivity of 87.5 kA/m or more. For example, a nitriding treatment of an FeNi random alloy is performed and then a nitriding treatment is performed to obtain an L10-FeNi ordered alloy. A volume mean particle size of a FeNi random alloy is, for example, 45 nm or more, and a treatment temperature of the nitriding treatment is, for example, greater than or equal to 300 degrees Celsius and is less than or equal to 500 degrees Celsius, and a treatment period is, for example, 10 hours or longer.

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：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：US20200075201A1

公开(公告)日：2020-03-05

申请号：US16678344

申请日：2019-11-08

Applicant: DENSO CORPORATION

Inventor： Sho GOTO ,  Eiji WATANABE

IPC: H01F1/047 ,  C23C8/26 ,  C22C19/03 ,  C22C38/08

Abstract: A magnetic material includes an FeNi ordered alloy. The FeNi ordered alloy has L10 ordered structure and is provided as an acicular particle having a longer axis and a shorter axis. A method for manufacturing a magnetic material including an FeNi ordered alloy includes preparing an FeNi disordered alloy provided as an acicular particle, and performing a nitriding treatment of nitriding the FeNi disordered alloy. The magnetic material manufacturing method further includes obtaining an L10-type FeNi ordered alloy provided as the acicular particle, by performing a denitrification treatment of removing nitrogen from the FeNi disordered alloy on which the nitriding treatment has been performed.