Method of fabricating a working component for magnetic heat exchange
US-9524816-B2 · Dec 20, 2016 · US
Modified La—Fe—Si magnetocaloric alloys
US11289248B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11289248-B2 |
| Application number | US-201916501027-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 11, 2019 |
| Priority date | Mar 5, 2018 |
| Publication date | Mar 29, 2022 |
| Grant date | Mar 29, 2022 |
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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 having one of the following compositions: LaFe 13-z Si z-y X y , where X=at least one of Al, Ga, and In with 1.1≤z≤1.9 and 0.01≤y≤0.5 La(Fe 1-w M w ) 13-z Si z-y X y , where X=at least one of Al, Ga, and In, and M=at least one of Co, Mn, Cr, and V with 0.05≤w≤0.1, and 1.1≤z≤1.9, and 0.01≤y≤0.5 LaFe 13-z Si z-y X y H v , where X=at least one of Al, Ga, and In with 1.1≤z≤1.9, 0.01≤y≤0.5, 0<v≤2.3 La(Fe 1-w M w ) 13-z Si z-y X y H v , where X=at least one of Al, Ga, and In, and M=at least one of Co, Mn, Cr, and V with 0.05≤w≤0.1, and 1.1≤z≤1.9, and 0.01≤y≤0.5, and 0<v≤2.3 wherein the value of y is selected to reduce brittleness of the alloy 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 decrepitation. 2. The alloy of claim 1 exhibiting large magnetocaloric effect that is tunable between about 170K and about 350K. 3. The alloy of claim 1 exhibiting increased thermal conductivity as compared to an identical La—Fe—Si alloy devoid of Al, Ga, and In. 4. The alloy of claim 1 that is machinable.
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Classifications
- H01F1/015Primary
Metals or alloys · CPC title
- C22C33/04Primary
by melting · CPC title
Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title
Materials specially adapted for additive manufacturing · CPC title
Energy efficient heating, ventilation or air conditioning [HVAC] · CPC title
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- What does patent US11289248B2 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 H01F1/015. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 29 2022 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).