The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys
LaFe11.8Si1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstr...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/164067 |
| _version_ | 1826109580795445248 |
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| author | Wu, Yu-Cai Li, Yuan-Xin Zhong, Xi -Chun Liu, Cui-Lan Huang, Jiao-Hong Yu, Hong-Ya Liu, Zhong-Wu Zhong, Ming -Long Zhong, Zhen-Chen Ramanujan, Raju V. |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Wu, Yu-Cai Li, Yuan-Xin Zhong, Xi -Chun Liu, Cui-Lan Huang, Jiao-Hong Yu, Hong-Ya Liu, Zhong-Wu Zhong, Ming -Long Zhong, Zhen-Chen Ramanujan, Raju V. |
| author_sort | Wu, Yu-Cai |
| collection | NTU |
| description | LaFe11.8Si1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstrated that the reduction of porosity in bulk magnetocaloric materials was an effective way to enhance the magnetocaloric effect. Compared to the HPS samples, the porosity of the SPS samples, with an initial powder size of 100−200 μm, reduced by 18%, which resulted in (−ΔSM)max and (−ΔSM)Vmax increasing by 15% and 19%, respectively. The SPS samples had a large (−ΔSM)max value in the range of 7.3‒12.8 J/kg·K (μ0ΔH=2T), good maximum compressive strength of 216‒636 MPa and thermal conductivity of 5.8‒7.6 W/m·K. Thus, SPS has been shown to be a promising processing technology to fabricate magnetocaloric materials (MCMs) with excellent performance. |
| first_indexed | 2024-10-01T02:20:34Z |
| format | Journal Article |
| id | ntu-10356/164067 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:20:34Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1640672023-01-04T02:05:16Z The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys Wu, Yu-Cai Li, Yuan-Xin Zhong, Xi -Chun Liu, Cui-Lan Huang, Jiao-Hong Yu, Hong-Ya Liu, Zhong-Wu Zhong, Ming -Long Zhong, Zhen-Chen Ramanujan, Raju V. School of Materials Science and Engineering Engineering::Materials Intermetallic Compounds Magnetic Materials LaFe11.8Si1.2 bulk magnetocaloric materials were prepared by hot-pressing sintering (HPS) and spark plasma sintering (SPS) techniques. The effects of the particle size, phase content and porosity on the thermal conductivity, mechanical and magnetocaloric properties were studied. Our results demonstrated that the reduction of porosity in bulk magnetocaloric materials was an effective way to enhance the magnetocaloric effect. Compared to the HPS samples, the porosity of the SPS samples, with an initial powder size of 100−200 μm, reduced by 18%, which resulted in (−ΔSM)max and (−ΔSM)Vmax increasing by 15% and 19%, respectively. The SPS samples had a large (−ΔSM)max value in the range of 7.3‒12.8 J/kg·K (μ0ΔH=2T), good maximum compressive strength of 216‒636 MPa and thermal conductivity of 5.8‒7.6 W/m·K. Thus, SPS has been shown to be a promising processing technology to fabricate magnetocaloric materials (MCMs) with excellent performance. This work was supported by the Natural Science Foundation of Guangdong Province (Grant No. 2022A1515012578, 2019A1515010970); the National Natural Science Foundation of China (Grant Nos. 51874143, 52066001); the Foundation of State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization (Grant No. 2020Z2218); the Guangzhou Municipal Science and Technology Project (Grant No. 201904010030). 2023-01-04T02:05:15Z 2023-01-04T02:05:15Z 2022 Journal Article Wu, Y., Li, Y., Zhong, X. -., Liu, C., Huang, J., Yu, H., Liu, Z., Zhong, M. -., Zhong, Z. & Ramanujan, R. V. (2022). The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys. Materials Research Bulletin, 155, 111974-. https://dx.doi.org/10.1016/j.materresbull.2022.111974 0025-5408 https://hdl.handle.net/10356/164067 10.1016/j.materresbull.2022.111974 2-s2.0-85134433206 155 111974 en Materials Research Bulletin © 2022 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Materials Intermetallic Compounds Magnetic Materials Wu, Yu-Cai Li, Yuan-Xin Zhong, Xi -Chun Liu, Cui-Lan Huang, Jiao-Hong Yu, Hong-Ya Liu, Zhong-Wu Zhong, Ming -Long Zhong, Zhen-Chen Ramanujan, Raju V. The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys |
| title | The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys |
| title_full | The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys |
| title_fullStr | The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys |
| title_full_unstemmed | The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys |
| title_short | The superior properties of spark plasma sintered La-Fe-Si magnetocaloric alloys |
| title_sort | superior properties of spark plasma sintered la fe si magnetocaloric alloys |
| topic | Engineering::Materials Intermetallic Compounds Magnetic Materials |
| url | https://hdl.handle.net/10356/164067 |
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