Magnetic properties and microstructures of rapidly solidified FePd alloy ribbons

Yoichi Kishi, Zenjiro Yajima, Teiko Okazaki, Yasubumi Furuya, Manfred Wuttig

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

It is well known that FePd alloys are effective as a magneto-thermoelastic actuator material, because they have large magnetostriction and shape memory effect. In order to use the alloys for a micro-actuator, magnetic properties and microstructures have been examined as for rapidly solidified Fe-29.6 at% Pd alloy ribbons. The ribbons exhibit a large magnetostriction at room temperature and good shape memory effect. Magnetostriction and coercive force of the ribbons markedly depend on the direction of the applied magnetic field. Maximum values of magnetostriction and coercive force are obtained at Θ = 85 degree (Θ is the angle between the magnetic field and the ribbon plane). Relief effects corresponding to the formation of FCT martensite variants are observed on the grains. X-ray diffraction profile at room temperature shows that FCT martensitic phase and FCC parent phase coexist in the ribbon. Dense striations are observed in the TEM bright field images of FCT martensite plates. Selected area electron diffraction patterns revealed the striations to be thin twins.

Original languageEnglish
Title of host publicationCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies
PublisherTrans Tech Publications Ltd
Pages24-29
Number of pages6
ISBN (Print)9783908158165
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies, CIMTEC 2008 - Acireale, Sicily, Italy
Duration: 2008 Jun 82008 Jun 13

Publication series

NameCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies
Volume59

Other

Other3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies, CIMTEC 2008
CountryItaly
CityAcireale, Sicily
Period08/6/808/6/13

Keywords

  • Ferromagnetic shape memory alloy
  • Magnetostriction
  • Martensitic transformation
  • Transmission electron microscope

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)

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