Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy
Current research on magnetocaloric materials (MCM) aims at developing low cost, environmentally friendly materials which can be manufactured by simple processes. We report the effect of high energy ball milling on the structural, magnetic and magnetocaloric properties of low cost Fe2.1Cr0.9Al alloys...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/140833 |
| _version_ | 1826125870316650496 |
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| author | Sharma, Vinay Shukla, Shashwat Xi, Shibo Ramanujan, Raju Vijayaraghavan |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Sharma, Vinay Shukla, Shashwat Xi, Shibo Ramanujan, Raju Vijayaraghavan |
| author_sort | Sharma, Vinay |
| collection | NTU |
| description | Current research on magnetocaloric materials (MCM) aims at developing low cost, environmentally friendly materials which can be manufactured by simple processes. We report the effect of high energy ball milling on the structural, magnetic and magnetocaloric properties of low cost Fe2.1Cr0.9Al alloys. The degree of structural order in the Fe-Cr sublattice was found to vary with milling time in a cyclic fashion at a milling speed of 600 rpm. This phenomenon was analyzed by a reaction rate model based on the stored energy during high energy milling. The sample possessed a B2 crystal structure before milling. Milling for 15 min. at 600 rpm induced structural changes to produce a L21 structure. Interestingly, the 15 min. milled sample exhibited ∼50% higher saturation magnetization (MS) compared to the value before milling. The relative cooling power (RCP) also increased to 300 Jkg−1 at 5 T, compared to a value of 244 Jkg−1 before milling. Extended X-ray absorption fine structure (EXAFS) studies revealed the emergence of short range order in the milled samples. |
| first_indexed | 2024-10-01T06:43:26Z |
| format | Journal Article |
| id | ntu-10356/140833 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:43:26Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1408332020-06-02T06:47:53Z Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy Sharma, Vinay Shukla, Shashwat Xi, Shibo Ramanujan, Raju Vijayaraghavan School of Materials Science and Engineering Singapore-HUJ Alliance for Research and Enterprise Nanomaterials for Energy and Energy-Water Nexus Campus for Research Excellence and Technological Enterprise Engineering::Materials Fe2.1Cr0.9Al Cyclic Structural Ordering Current research on magnetocaloric materials (MCM) aims at developing low cost, environmentally friendly materials which can be manufactured by simple processes. We report the effect of high energy ball milling on the structural, magnetic and magnetocaloric properties of low cost Fe2.1Cr0.9Al alloys. The degree of structural order in the Fe-Cr sublattice was found to vary with milling time in a cyclic fashion at a milling speed of 600 rpm. This phenomenon was analyzed by a reaction rate model based on the stored energy during high energy milling. The sample possessed a B2 crystal structure before milling. Milling for 15 min. at 600 rpm induced structural changes to produce a L21 structure. Interestingly, the 15 min. milled sample exhibited ∼50% higher saturation magnetization (MS) compared to the value before milling. The relative cooling power (RCP) also increased to 300 Jkg−1 at 5 T, compared to a value of 244 Jkg−1 before milling. Extended X-ray absorption fine structure (EXAFS) studies revealed the emergence of short range order in the milled samples. NRF (Natl Research Foundation, S’pore) 2020-06-02T06:47:53Z 2020-06-02T06:47:53Z 2018 Journal Article Sharma, V., Shukla, S., Xi, S., & Ramanujan, R. V. (2019). Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy. Journal of Magnetism and Magnetic Materials, 474, 528-536. doi:10.1016/j.jmmm.2018.09.082 0304-8853 https://hdl.handle.net/10356/140833 10.1016/j.jmmm.2018.09.082 2-s2.0-85056654516 474 528 536 en Journal of Magnetism and Magnetic Materials © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Materials Fe2.1Cr0.9Al Cyclic Structural Ordering Sharma, Vinay Shukla, Shashwat Xi, Shibo Ramanujan, Raju Vijayaraghavan Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy |
| title | Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy |
| title_full | Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy |
| title_fullStr | Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy |
| title_full_unstemmed | Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy |
| title_short | Cyclic structural ordering induced by high energy ball milling in a Fe2.1Cr0.9Al magnetocaloric alloy |
| title_sort | cyclic structural ordering induced by high energy ball milling in a fe2 1cr0 9al magnetocaloric alloy |
| topic | Engineering::Materials Fe2.1Cr0.9Al Cyclic Structural Ordering |
| url | https://hdl.handle.net/10356/140833 |
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