Superior properties of LaFe11.8Si1.2/La65Co35magnetocaloric composites processed by spark plasma sintering

Xichun Zhong*, Yucai Wu, Yuanxin Li, Xuan Huang, Jiaohong Huang, Cuilan Liu, Hongya Yu, Zhongwu Liu, Minglong Zhong, Zhenchen Zhong, R. V. Ramanujan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A series of LaFe11.8Si1.2/La65Co35 bulk composites were fabricated by spark plasma sintering (SPS) followed by diffusion annealing. The effect of sintering temperature (1073-1223 K) on the magnetocaloric and other properties of LaFe11.8Si1.2/La65Co35 bulk composites were investigated. The 1:13 phase content in all the annealed samples was ∼90 wt%. The mechanical and magnetocaloric properties of these annealed bulk composites could be improved by tuning the sintering temperature. The Curie temperature (TC) and maximum magnetic entropy change (-ΔSM)max of the annealed samples varied in the range of 211-228 K and 5.56-9.33 J kg-1 K-1, respectively. Selected samples exhibited excellent mechanical and magnetocaloric properties. The (-ΔSM)max value was 9.33 J kg-1 K-1 at TC of 217.8 K. Its maximum compressive strength (σbc)max value was 540 MPa at a strain of 3.48%, which exceeded the mechanical properties of most La-Fe-Si based bulk composites prepared by hot-pressing sintering (HPS). Thus, La-Fe-Si based bulk composites with good comprehensive properties could be obtained by combining SPS and diffusion annealing.

Original languageEnglish
Pages (from-to)1638-1650
Number of pages13
JournalJournal of Materials Research and Technology
Volume22
DOIs
Publication statusPublished - Jan 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 The Author(s).

ASJC Scopus Subject Areas

  • Ceramics and Composites
  • Biomaterials
  • Surfaces, Coatings and Films
  • Metals and Alloys

Keywords

  • La-Fe-Si based composites
  • Magnetocaloric effects
  • Mechanical properties
  • Microstructural evolution
  • Sintering temperature
  • Spark plasma sintering

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