Magnetostrictive properties of polymer-bonded amorpnous Tb-Fe-B composites

S. R. Kim, S. Y. Kang, J. K. Park, J. T. Nam, Derac Son, S. H. Lim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Amorphous ribbons of an alloy with the composition (Tb 0.33Fe0.67)0.98B0.02, which exhibit good magnetostrictive properties at low magnetic fields, are bonded with a phenol-based binder to fabricate bulk composites. Efforts to determine optimum fabrication parameters are made by examining magnetic and mechanical properties of bulk compacts obtained at various fabrication conditions. From the binder content dependence of magnetostriction and compressive strength, the optimum binder content is estimated to be about 4.3 wt %, taking into account magnetostrictive and mechanical properties and the necessity of reducing nonmagnetic binder content. The two properties of magnetostriction and compressive strength vary nearly linearly with the compaction pressure; as the compaction pressure varies from 0.25 to 1.0 GPa, magnetostriction decreases but compressive strength increases, making it difficult to determine the optimum compaction pressure. A magnetostriction of 493 ppm (at 1.1 kOe) is achieved from the present bulk composites, together with a high dλ/dH (sensitivity of magnetostriction with applied magnetic field) of 1 ppm/Oe.

Original languageEnglish
Pages (from-to)7285-7287
Number of pages3
JournalJournal of Applied Physics
Volume83
Issue number11
DOIs
Publication statusPublished - 1998
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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