Consolidation of Al/Fe3O4 composites using high-pressure torsion and their magnetic properties

Ryo Yonemoto, Makoto Arita, Zenji Horita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Severe plastic deformation using high-pressure torsion was applied for consolidation of Al/Fe3O4 composites. The consolidation was achieved with the Vickers microhardness saturated to -240 HV for Al-10 vol%Fe3O4 and to ∼300 HV for Al-20 vol%Fe 3O4 after processing for 5 revolutions under a pressure of 6 GPa. The density increased with straining and reached the highest after 5-7 revolutions but decreased for further revolutions. The coercive force had the same trend as the density but the saturation magnetization is almost invariable with straining. No appreciable difference was observed between the magnetic fields applied in the directions perpendicular and parallel to the ring plane. Electrical conductivity decreased with straining and this was attributed to generation of a large amount of lattice defects such as grain boundaries.

Original languageEnglish
Pages (from-to)459-463
Number of pages5
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume62
Issue number11
DOIs
Publication statusPublished - Dec 1 2012

All Science Journal Classification (ASJC) codes

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

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