Title:
窒化鉄系磁石
Document Type and Number:
Japanese Patent JP6778653
Kind Code:
B2
Abstract:
To provide a nitriding iron-based magnet that can make both good mechanical strength and high maximum energy product compatible.SOLUTION: The nitriding iron-based magnet includes FeNphase. The nitriding iron-based magnet has nitriding iron-based magnetic particles 2 and nitriding iron-based particles 4. A shape-aspect ratio which is represented as a ratio of an average particle long diameter of the nitriding iron-based magnetic particles to an average particle short diameter of the nitriding iron-based magnetic particles is 3.0 or more and 10.0 or less. An average particle diameter ratio of the nitriding iron-based particles which is represented as a ratio of an average particle diameter of the nitriding iron-based particles to the average particle short diameter of the nitriding iron-based magnetic particles is 50% or more and 100% or less. In a cross section parallel to an orientation direction of the nitriding iron-based magnet, an area ratio of the nitriding iron-based magnetic particles which is represented as a ratio of areas occupied by the nitriding iron-based magnetic particles relative to the total areas of areas occupied by the nitriding iron-based magnetic particles and areas occupied by the nitriding iron-based particles is 80.0% or more and 99.9% or less.SELECTED DRAWING: Figure 2
Inventors:
Masakazu Hosono
Application Number:
JP2017102909A
Publication Date:
November 04, 2020
Filing Date:
May 24, 2017
Export Citation:
Assignee:
tdk Corporation
Toda Kogyo Co., Ltd.
Toda Kogyo Co., Ltd.
International Classes:
H01F1/08; B22F3/00; B82Y25/00; B82Y30/00; H01F1/047
Domestic Patent References:
| JP2016146388A | ||||
| JP2012231098A | ||||
| JP2009277323A | ||||
| JP10270228A | ||||
| JP2004339598A |
Attorney, Agent or Firm:
Maeda/Suzuki International Patent Corporation