Castable Ce-Based Magnets
US-2024379263-A1 · Nov 14, 2024 · US
R-T-B sintered magnet manufacturing method
US9293252B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9293252-B2 |
| Application number | US-201113823153-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 29, 2011 |
| Priority date | Sep 30, 2010 |
| Publication date | Mar 22, 2016 |
| Grant date | Mar 22, 2016 |
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Abstract
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[Problem] To provide a heavy rare-earth element RH diffusion process that contributes greatly to mass production. [Solution] A method for producing a sintered magnet includes the steps of: providing a sintered R-T-B based magnet body; providing an RH diffusion source which is made of at least one of a fluoride, an oxide and an oxyfluoride that each include Dy and/or Tb; loading the sintered R-T-B based magnet body and the RH diffusion source into a process chamber so that the magnet body and the diffusion source are movable relative to each other and are readily brought close to, or into contact with, each other; and performing an RH diffusion process in which the sintered R-T-B based magnet body and the RH diffusion source are heated to a processing temperature of 800° C. through 950° C. while being moved either continuously or discontinuously in the process chamber.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a sintered R-T-B based magnet, the method comprising the steps of: providing a sintered R-T-B based magnet body; providing an RH diffusion source which is made of at least one of a fluoride, an oxide and an oxyfluoride that each include Dy and/or Tb; loading the sintered R-T-B based magnet body and the RH diffusion source into a process chamber so that the magnet body and the diffusion source are movable relative to each othe…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C22C38/005Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US9293252B2 cover?
- [Problem] To provide a heavy rare-earth element RH diffusion process that contributes greatly to mass production. [Solution] A method for producing a sintered magnet includes the steps of: providing a sintered R-T-B based magnet body; providing an RH diffusion source which is made of at least one of a fluoride, an oxide and an oxyfluoride that each include Dy and/or Tb; loading the sinter…
- Who is the assignee on this patent?
- Kuniyoshi Futoshi, Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C38/005. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).