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US-9687971-B2 · Jun 27, 2017 · US
Modified La—Fe—Si magnetocaloric alloys
US12168819B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12168819-B2 |
| Application number | US-202217803110-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 16, 2022 |
| Priority date | Mar 5, 2018 |
| Publication date | Dec 17, 2024 |
| Grant date | Dec 17, 2024 |
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Abstract
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A magnetocaloric material comprising a La—Fe—Si based alloy composition that is compositionally modified to include a small but effective amount of at least one of Al, Ga, and In to improve mechanical stability of the alloy (substantially reduce alloy brittleness), improve thermal conductivity, and preserve comparable or provide improved magnetocaloric effects. The alloy composition may be further modified by inclusion of at least one of Co, Mn, Cr, and V as well as interstitial hydrogen.
First claim
Opening claim text (preview).
We claim: 1. A magnetocaloric alloy comprising a magnetocaloric intermetallic compound phase having a crystal structure which comprises La, Fe and Si and at least one of Al, Ga, and/or In are present in solid solution in an amount of 0.07 atomic % to 3.5 atomic % of the alloy which amount is selected to reduce alloy brittleness as compared to an identical alloy devoid of Al, Ga, and In to increase the number of temperature/magnetic field cycles without alloy cracking or decrepitating. 2. The alloy of claim 1 wherein said at least one of Al, Ga, and/or In is/are substituted for an amount of the Si of the alloy. 3. The alloy of claim 1 also including at least one of Co, Mn, Cr, and V. 4. The alloy of claim 3 wherein said at least one of Co, Mn, Cr, and V is/are substituted for some of the Fe of the alloy. 5. The alloy of claim 1 including interstitial hydrogen. 6. The alloy of claim 1 which is solidified from a bulk alloy melt. 7. The alloy of claim 6 which is solidified and then heat treated. 8. The alloy of claim 1 wherein said at least one of Al, Ga, and/or In is/are present in an amount of 0.6 atomic % to 3.5 atomic % of the alloy. 9. The alloy of claim 1 wherein said at least one of Al, Ga, and/or In is/are present in an amount of 0.7 atomic % to 3.5 atomic % of the alloy.
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Classifications
Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title
containing rare earths, i.e. Sc, Y, Lanthanides · CPC title
Materials specially adapted for additive manufacturing · CPC title
Magnetic · CPC title
containing silicon · CPC title
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- What does patent US12168819B2 cover?
- A magnetocaloric material comprising a La—Fe—Si based alloy composition that is compositionally modified to include a small but effective amount of at least one of Al, Ga, and In to improve mechanical stability of the alloy (substantially reduce alloy brittleness), improve thermal conductivity, and preserve comparable or provide improved magnetocaloric effects. The alloy composition may be furt…
- Who is the assignee on this patent?
- Univ Iowa State Res Found Inc
- What technology area does this patent fall under?
- Primary CPC classification C22C33/04. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 17 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).