Soft magnetic alloy, dust core, and magnetic device
US-2023125339-A1 · Apr 27, 2023 · US
Soft magnetic alloy powder comprising Fe, Co and Si, dust core, and magnetic device
US12062474B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12062474-B2 |
| Application number | US-202217968627-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 18, 2022 |
| Priority date | Oct 21, 2021 |
| Publication date | Aug 13, 2024 |
| Grant date | Aug 13, 2024 |
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Abstract
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A soft magnetic alloy powder includes a particle body and a surface layer. The particle body comprises a soft magnetic alloy including Fe and Co. The surface layer is located on a surface side of the particle body. The surface layer includes one or more local maximum points of Si concentration and one or more local maximum points of Co concentration. The surface layer satisfies DSi≤DCo, in which DSi is a distance from an interface between the particle body and the surface layer to a first Si local maximum point LSimax, and DCo is a distance from the interface to a first Co local maximum point LComax.
First claim
Opening claim text (preview).
What is claimed is: 1. A soft magnetic alloy powder comprising: a particle body comprising a soft magnetic alloy including Fe and Co; and a surface layer located on a surface side of the particle body, wherein the surface layer includes one or more local maximum points of Si concentration and one or more local maximum points of Co concentration, and D Si ≤D Co is satisfied, in which D Si is a distance from an interface between the particle body and the surface layer to a first Si local maximum point L Si max as a local maximum point located closest to a particle center among the one or more local maximum points of Si concentration, and D Co is a distance from the interface to a first Co local maximum point L Co max as a local maximum point located closest to the particle center among the one or more local maximum points of Co concentration. 2. The soft magnetic alloy powder according to claim 1 , wherein D Si <D Co is satisfied. 3. The soft magnetic alloy powder according to claim 1 , wherein the surface layer comprises an oxide phase. 4. The soft magnetic alloy powder according to claim 1 , wherein the surface layer comprises a Si oxide phase including a Si oxide, and the L Si max exists in the Si oxide phase. 5. The soft magnetic alloy powder according to claim 4 , wherein the surface layer comprises a Co oxide phase including a Co oxide, the L Co max exists in the Co oxide phase, and a part of the Co oxide phase overlaps with a part of a surface side of the Si oxide phase. 6. The soft magnetic alloy powder according to claim 4 , wherein the surface layer comprises a Co oxide phase including a Co oxide, the L Co max exists in the Co oxide phase, and the Co oxide phase is located closer to a surface side of the surface layer than the Si oxide phase. 7. A dust core comprising the soft magnetic alloy powder according to claim 1 . 8. A magnetic device comprising the soft magnetic alloy powder according to claim 1 .
Assignees
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Classifications
based on cobalt · CPC title
characterised by the range of the alloying elements · CPC title
- C22C45/02Primary
with iron as the major constituent · CPC title
based on Fe/Ni (H01F1/15325 takes precedence) · CPC title
- H01F1/15316Primary
based on Co (H01F1/15325 takes precedence) · CPC title
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- What does patent US12062474B2 cover?
- A soft magnetic alloy powder includes a particle body and a surface layer. The particle body comprises a soft magnetic alloy including Fe and Co. The surface layer is located on a surface side of the particle body. The surface layer includes one or more local maximum points of Si concentration and one or more local maximum points of Co concentration. The surface layer satisfies DSi≤DCo, in whic…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification C22C45/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 13 2024 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).