Reactive Spark Plasma-Assisted Processing of Powdered RNi₂ Magnetocaloric Compounds (R = Dy, Tb)

IF 1.9 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Magnetics Pub Date : 2026-10-01 Epub Date: 2026-04-16 DOI:10.1109/TMAG.2026.3684214

R. U. Pérez-Batalla;K. Padrón-Alemán;J. L. Sánchez Llamazares

{"title":"Reactive Spark Plasma-Assisted Processing of Powdered RNi₂ Magnetocaloric Compounds (R = Dy, Tb)","authors":"R. U. Pérez-Batalla;K. Padrón-Alemán;J. L. Sánchez Llamazares","doi":"10.1109/TMAG.2026.3684214","DOIUrl":null,"url":null,"abstract":"Single-phase powders of the magnetocaloric Laves phases DyNi2 and TbNi2, synthesized by arc melting, were homogeneously mixed in a 35:65 ratio and consolidated using a fast reactive spark plasma sintering (SPS) process. X-ray diffraction, energydispersive spectroscopy (EDS) mapping, and thermomagnetic analyses confirm that, within a short sintering time (around 6.6 min), the sintered material forms a solid solution of the precursor alloys. The resulting sample is essentially single phase, crystallizing in the MgCu2-type structure with a homogeneous elemental distribution. A Curie temperature of 30.3 K and a maximum magnetic entropy change of <inline-formula> <tex-math>$8.4~\\mathrm{Jkg}^{-1} \\mathrm{~K}^{-1}$ </tex-math></inline-formula> under a magnetic field change of 2 T were determined. These results demonstrate the effectiveness of reactive SPS as a rapid route for preparing rare-earth-based <inline-formula> <tex-math>$\\mathbf{R}_{{\\mathrm {1-x}}} \\mathbf{R}_{\\mathrm {x}}^{\\prime} \\mathbf{N i}_2$ </tex-math></inline-formula> Laves-phase solid solutions with tunable magnetocaloric properties optimized for hydrogen refrigeration technology.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 10","pages":"2500705-2500705"},"PeriodicalIF":1.9000,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Magnetics","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/11482229/","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/4/16 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

Single-phase powders of the magnetocaloric Laves phases DyNi2 and TbNi2, synthesized by arc melting, were homogeneously mixed in a 35:65 ratio and consolidated using a fast reactive spark plasma sintering (SPS) process. X-ray diffraction, energydispersive spectroscopy (EDS) mapping, and thermomagnetic analyses confirm that, within a short sintering time (around 6.6 min), the sintered material forms a solid solution of the precursor alloys. The resulting sample is essentially single phase, crystallizing in the MgCu2-type structure with a homogeneous elemental distribution. A Curie temperature of 30.3 K and a maximum magnetic entropy change of

$8.4~\mathrm{Jkg}^{-1} \mathrm{~K}^{-1}$

under a magnetic field change of 2 T were determined. These results demonstrate the effectiveness of reactive SPS as a rapid route for preparing rare-earth-based

$\mathbf{R}_{{\mathrm {1-x}}} \mathbf{R}_{\mathrm {x}}^{\prime} \mathbf{N i}_2$

Laves-phase solid solutions with tunable magnetocaloric properties optimized for hydrogen refrigeration technology.

查看原文本刊更多论文

反应火花等离子体辅助处理粉末RNi 2磁热化合物（R = Dy, Tb）

采用电弧熔合法制备磁热Laves相DyNi2和TbNi2的单相粉末，以35:65的比例均匀混合，并采用快速反应放电等离子烧结（SPS）工艺进行固结。x射线衍射、能谱图（EDS）和热磁分析证实，在很短的烧结时间内（约6.6分钟），烧结材料形成了前驱体合金的固溶体。所得样品基本为单相，结晶为mgcu2型结构，元素分布均匀。在2t磁场变化下，居里温度为30.3 K，最大磁熵变化为8.4~\ mathm {Jkg}^{-1} \ mathm {~K}^{-1}$。这些结果表明，反应性SPS是制备稀土基$\mathbf{R}_{\ mathm {1-x}}} \mathbf{R}_{\ mathm {x}}^{\prime} \mathbf{N i}_2$ laes相磁热性能可调固溶体的有效途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Transactions on Magnetics 工程技术-工程：电子与电气

CiteScore

4.00

自引率

14.30%

发文量

565

审稿时长

4.1 months

期刊介绍： Science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage. The IEEE Transactions on Magnetics publishes scholarly articles of archival value as well as tutorial expositions and critical reviews of classical subjects and topics of current interest.