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...

Full description

Saved in:
Bibliographic Details
Main Authors: 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.
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2023
Subjects:
Online Access:https://hdl.handle.net/10356/164067
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-164067
record_format dspace
spelling sg-ntu-dr.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.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Intermetallic Compounds
Magnetic Materials
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
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.
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.
format Article
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.
author_sort Wu, Yu-Cai
title 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_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_sort superior properties of spark plasma sintered la-fe-si magnetocaloric alloys
publishDate 2023
url https://hdl.handle.net/10356/164067
_version_ 1754611263452741632