Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders
Magnetocaloric alloys are an important class of materials that enable non-vapor compression cycles. One promising candidate for magnetocaloric systems is LaFeMnSi, thanks to a combination of factors including low-cost constituents and a useful curie temperature, although control of the constituents’...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/7/9/132 |
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| author | Jamieson Brechtl Michael R. Koehler Michael S. Kesler Hunter B. Henderson Alexander A. Baker Kai Li James Kiggans Kashif Nawaz Orlando Rios Ayyoub M. Momen |
| author_facet | Jamieson Brechtl Michael R. Koehler Michael S. Kesler Hunter B. Henderson Alexander A. Baker Kai Li James Kiggans Kashif Nawaz Orlando Rios Ayyoub M. Momen |
| author_sort | Jamieson Brechtl |
| collection | DOAJ |
| description | Magnetocaloric alloys are an important class of materials that enable non-vapor compression cycles. One promising candidate for magnetocaloric systems is LaFeMnSi, thanks to a combination of factors including low-cost constituents and a useful curie temperature, although control of the constituents’ phase distribution can be challenging. In this paper, the effects of composition and high energy ball milling on the particle morphology and phase stability of LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> magnetocaloric powders were investigated. The powders were characterized with optical microscopy, dynamic light scattering, X-ray diffraction (XRD), and differential scanning calorimetry (DSC). It was found that the powders retained most of their original magnetocaloric phase during milling, although milling reduced the degree of crystallinity in the powder. Furthermore, some oxide phases (<1 weight percent) were present in the as-received and milled powders, which indicates that no significant contamination of the powders occurred during milling. Finally, the results indicated that the Curie temperature drops as Fe content decreases (Mn content increases). In all of the powders, milling led to an increase in the Curie temperature of ~3–6 °C. |
| first_indexed | 2024-03-10T07:30:01Z |
| format | Article |
| id | doaj.art-7efb5c730988470bbda043382ed76840 |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-10T07:30:01Z |
| publishDate | 2021-09-01 |
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| series | Magnetochemistry |
| spelling | doaj.art-7efb5c730988470bbda043382ed768402023-11-22T13:58:09ZengMDPI AGMagnetochemistry2312-74812021-09-017913210.3390/magnetochemistry7090132Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric PowdersJamieson Brechtl0Michael R. Koehler1Michael S. Kesler2Hunter B. Henderson3Alexander A. Baker4Kai Li5James Kiggans6Kashif Nawaz7Orlando Rios8Ayyoub M. Momen9Buildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAJIAM Diffraction Facility, Joint Institute for Advanced Materials, University of Tennessee, Knoxville, TN 37920, USAMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAMaterials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USAMaterials Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USABuildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USABuildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USABuildings and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USAMagnetocaloric alloys are an important class of materials that enable non-vapor compression cycles. One promising candidate for magnetocaloric systems is LaFeMnSi, thanks to a combination of factors including low-cost constituents and a useful curie temperature, although control of the constituents’ phase distribution can be challenging. In this paper, the effects of composition and high energy ball milling on the particle morphology and phase stability of LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> magnetocaloric powders were investigated. The powders were characterized with optical microscopy, dynamic light scattering, X-ray diffraction (XRD), and differential scanning calorimetry (DSC). It was found that the powders retained most of their original magnetocaloric phase during milling, although milling reduced the degree of crystallinity in the powder. Furthermore, some oxide phases (<1 weight percent) were present in the as-received and milled powders, which indicates that no significant contamination of the powders occurred during milling. Finally, the results indicated that the Curie temperature drops as Fe content decreases (Mn content increases). In all of the powders, milling led to an increase in the Curie temperature of ~3–6 °C.https://www.mdpi.com/2312-7481/7/9/132magnetocaloricmillingX-ray diffractionparticle sizemorphology |
| spellingShingle | Jamieson Brechtl Michael R. Koehler Michael S. Kesler Hunter B. Henderson Alexander A. Baker Kai Li James Kiggans Kashif Nawaz Orlando Rios Ayyoub M. Momen Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders Magnetochemistry magnetocaloric milling X-ray diffraction particle size morphology |
| title | Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders |
| title_full | Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders |
| title_fullStr | Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders |
| title_full_unstemmed | Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders |
| title_short | Effect of Composition on the Phase Structure and Magnetic Properties of Ball-Milled LaFe<sub>11.71-x</sub>Mn<sub>x</sub>Si<sub>1.29</sub>H<sub>1.6</sub> Magnetocaloric Powders |
| title_sort | effect of composition on the phase structure and magnetic properties of ball milled lafe sub 11 71 x sub mn sub x sub si sub 1 29 sub h sub 1 6 sub magnetocaloric powders |
| topic | magnetocaloric milling X-ray diffraction particle size morphology |
| url | https://www.mdpi.com/2312-7481/7/9/132 |
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