Dynamic magnetomechanical properties of epoxy-bonded (Tb0.3Dy0.7)1-xPrxFe1.55 (0 ≤ x ≤ 0.4) pseudo-1-3 magnetostrictive composites

Xiangke Lv, Siu Wing Or, Wei Liu, Xionghua Liu, Zhidong Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Pseudo-1-3 magnetostrictive composites of 0.5 volume fraction are fabricated by embedding and aligning stabilizer (B, Co)-free, light rare earth (Pr)-contained magnetostrictive (Tb0.3Dy0.7)1-xPrxFe1.55(0 ≤ x ≤ 0.4) particles with a size distribution of 10-300 μm in a passive epoxy matrix. The dynamic magnetomechanical properties of the composites with different Pr content x are investigated as a function of both bias field (=10-200 kA/m) and frequency (=25 Hz-70 kHz). The composites show similar qualitative trends in properties for all x with no frequency dispersion effect except for the resonance range. The dynamic relative permeability μr 33Tdemonstrates a decreasing trend with increasing x for the whole range of bias field due to the weakening of saturation magnetization with increasing Pr content. The two elastic moduli E3Hand E3B, which result in negative-ΔE with maximum dynamic strain coefficient d33and dynamic magnetomechanical coupling coefficient k33near 140 kA/m bias in all composites, decrease with increasing x for all biases owing to the increasing compliance contribution from Pr. The (Tb0.3Dy0.7)0.75Pr0.25Fe1.55composite exhibits the largest d33and k33at 140 kA/m bias as a result of the compensation for magnetocrystalline anisotropy.
Original languageEnglish
Pages (from-to)271-275
Number of pages5
JournalJournal of Alloys and Compounds
Volume476
Issue number1-2
DOIs
Publication statusPublished - 12 May 2009

Keywords

  • Dynamic magnetomechanical properties
  • Light rare earths
  • Magnetostrictive alloys
  • Magnetostrictive composites
  • Stabilizing elements

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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