Presintered preform for repair of superalloy component
US-2015367456-A1 · Dec 24, 2015 · US
Method of producing R-T-B sintered magnet
US9484151B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9484151-B2 |
| Application number | US-201213977125-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 19, 2012 |
| Priority date | Jan 19, 2011 |
| Publication date | Nov 1, 2016 |
| Grant date | Nov 1, 2016 |
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Abstract
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A method for producing a sintered R-T-B based magnet includes providing at least one sintered R-T-B based magnet material (where R is a rare-earth element and T is Fe or Fe and Co); providing RH diffusion sources that include a heavy rare-earth element RH (which is Dy and/or Tb) and 30 to 80 mass % of Fe and that have a particle size between 53 μm and 5600 μm; arranging the magnet material and the RH diffusion sources in a process vessel so that some of the RH diffusion sources are in contact with the magnet material; performing an RH diffusion process by heat treating in an inert ambient at a pressure of 5000 Pa or less and at a temperature of 800° C. to 1000° C.; and separating the RH diffusion sources from the magnet material.
First claim
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The invention claimed is: 1. A method for producing a sintered R-T-B based magnet, the method comprising the steps of: providing at least one sintered R-T-B based magnet material, where R is a rare-earth element and T is either Fe alone or Fe and Co; providing a plurality of RH diffusion sources each of which includes a heavy rare-earth element RH, the RH is Dy and/or Tb, and 30 mass % to 80 mass % of Fe and which has a particle size of more than 53 μm and equal to or smaller th…
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- What does patent US9484151B2 cover?
- A method for producing a sintered R-T-B based magnet includes providing at least one sintered R-T-B based magnet material (where R is a rare-earth element and T is Fe or Fe and Co); providing RH diffusion sources that include a heavy rare-earth element RH (which is Dy and/or Tb) and 30 to 80 mass % of Fe and that have a particle size between 53 μm and 5600 μm; arranging the magnet material and …
- Who is the assignee on this patent?
- Kuniyoshi Futoshi, Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification B22F3/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 01 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).