R-t-b based permanent magnet and raw alloy for the same
US-2015302959-A1 · Oct 22, 2015 · US
Alloy material for R-T-B system rare earth permanent magnet, method for producing R-T-B system rare earth permanent magnet, and motor
US9601979B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9601979-B2 |
| Application number | US-201113876348-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 2, 2011 |
| Priority date | Sep 30, 2010 |
| Publication date | Mar 21, 2017 |
| Grant date | Mar 21, 2017 |
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Abstract
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An alloy material for an R-T-B system rare earth permanent magnet having a high orientation rate and high coercivity (Hcj), and a method for producing an R-T-B system rare earth permanent magnet using the alloy material. The alloy material includes a plurality of R-T-B system alloys having different compositions and a metal powder. The respective R-T-B system alloys are formed of R which is composed of two or more kinds selected from rare earth elements, T which is composed of a transition metal essentially containing Fe, B, and unavoidable impurities. A first alloy having the greatest Dy content contains 17 mass % or greater of Dy, and a Dy concentration difference between the first alloy and a second alloy having the smallest Dy concentration difference with respect to the first alloy among the plurality of R-T-B system alloys is 5 mass % or greater.
First claim
Opening claim text (preview).
The invention claimed is: 1. An alloy material for an R-T-B system rare earth permanent magnet, comprising: a plurality of R-T-B system alloys having different compositions; and a metal or a semi-metallic powder, wherein the respective R-T-B system alloys are formed of R which is composed of two or more kinds selected from rare earth elements, T which is composed of a transition metal essentially containing Fe, B, and unavoidable impurities, a first alloy having the greatest D…
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- H01F1/0577Primary
Electricity · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9601979B2 cover?
- An alloy material for an R-T-B system rare earth permanent magnet having a high orientation rate and high coercivity (Hcj), and a method for producing an R-T-B system rare earth permanent magnet using the alloy material. The alloy material includes a plurality of R-T-B system alloys having different compositions and a metal powder. The respective R-T-B system alloys are formed of R which is com…
- Who is the assignee on this patent?
- Nakajima Kenichiro, Yamazaki Takashi, Showa Denko Kk
- What technology area does this patent fall under?
- Primary CPC classification H01F1/0577. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 21 2017 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).