TY - GEN
T1 - Magnetic properties and microstructures of rapidly solidified FePd alloy ribbons
AU - Kishi, Yoichi
AU - Yajima, Zenjiro
AU - Okazaki, Teiko
AU - Furuya, Yasubumi
AU - Wuttig, Manfred
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
KW - Ferromagnetic shape memory alloy
KW - Magnetostriction
KW - Martensitic transformation
KW - Transmission electron microscope
UR - http://www.scopus.com/inward/record.url?scp=62449129269&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=62449129269&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AST.59.24
DO - 10.4028/www.scientific.net/AST.59.24
M3 - Conference contribution
AN - SCOPUS:62449129269
SN - 9783908158165
T3 - CIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies
SP - 24
EP - 29
BT - CIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies
PB - Trans Tech Publications Ltd
T2 - 3rd International Conference on Smart Materials, Structures and Systems - State-of-the-art Research and Application of SMAs Technologies, CIMTEC 2008
Y2 - 8 June 2008 through 13 June 2008
ER -