Connecting element, reinforcement and use of a connecting element
US-2024151036-A1 · May 9, 2024 · US
RFeB SYSTEM SINTERED MAGNET PRODUCTION METHOD AND RFeB SYSTEM SINTERED MAGNET
US2016273091A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016273091-A1 |
| Application number | US-201414777624-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 13, 2014 |
| Priority date | Mar 18, 2013 |
| Publication date | Sep 22, 2016 |
| Grant date | — |
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Abstract
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Producing an RFeB system sintered magnet with high corrosion resistance and low loss of energy in an RFeB system sintered magnet with high magnetic properties produced by a grain boundary diffusion process. A paste prepared by mixing an organic matter having a molecular structure including an oxygen atom and a metallic powder containing a heavy rare-earth element which is at least one element selected from the group of Dy, Ho and Tb, is applied to the surface of an RFeB system sintered compact composed of crystal grains whose main phase is R 2 Fe 14 B containing, as a main rare-earth element, a light rare-earth element which is at least one element selected from the group of Nd and Pr. A heating process for a grain boundary diffusion treatment is performed. As a result, a protective layer containing an oxide of the light rare-earth element is formed on the surface.
First claim
Opening claim text (preview).
1 . A method for producing an RFeB system sintered magnet, comprising: a paste prepared by mixing an organic matter having a molecular structure including an oxygen atom and a metallic powder containing a heavy rare-earth element R H which is at least one element selected from a group of Dy, Ho and Tb, is applied to a surface of an RFeB system sintered compact composed of crystal grains whose main phase is R 2 Fe 14 B containing, as a main rare-earth element R, a light rare-earth element R L which is at least one element selected from a group of Nd and Pr; and a heating process for a grain boundary diffusion treatment is performed, with the paste in contact with the surface. 2 . An RFeB system sintered magnet, comprising: a protective layer containing an oxide of a light rare-earth element R L which is at least one element selected from a group of Nd and Pr is formed on a surface of an RFeB system sintered compact composed of crystal grains whose main phase is R 2 Fe 14 B containing the light rare-earth element R L as a main rare-earth element R; and a heavy rare-earth element R H which is at least one element selected from a group of Dy, Ho and Tb is diffused in a boundary of the crystal grains.
Assignees
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Classifications
Metallic powder containing lubricating or binding agents; Metallic powder containing organic material · CPC title
- C22C38/00Primary
Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) · CPC title
containing cobalt · CPC title
containing copper · CPC title
Layer in a composite stack of layers, workpiece or article · CPC title
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- What does patent US2016273091A1 cover?
- Producing an RFeB system sintered magnet with high corrosion resistance and low loss of energy in an RFeB system sintered magnet with high magnetic properties produced by a grain boundary diffusion process. A paste prepared by mixing an organic matter having a molecular structure including an oxygen atom and a metallic powder containing a heavy rare-earth element which is at least one element s…
- Who is the assignee on this patent?
- Intermetallics Co Ltd, Daido Steel Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C38/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Sep 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).