Ultrasound velocities and magnetomechanical coupling in Fe Co-Ni-Zr-Cu-Nb-B alloy strips after heat treatment

• Autorzy: Kaczkowski Z. , Muller M. , Lanotte L.
• Języki publikacji: EN

Abstrakty

EN

The magnetic field and beat-treatment dependences of the ultrasound velocities at constant magnetic field (CH) and at constant magnetic induction (cB) and magnetomechanical coupling were investigated in Fe62.5Co6Ni7.5Zr6Cu1Nb2B15 alloy strips in an as-quenched state and after annealing above the Curie temperature. After annealing above 350oC (up to 390oC) the magnetomechanical coupling coefficient (k) was three times higher than that for asquenched state (0.10-012), i.e. k = 0.32-0.37. The minimum values of the cH (= 3.6 km/s) were observed after annealing in the temperature range from 350 to 390oC at 75-100 A/m. There are equal or somewhat higher values of bias field for the minimum of the cH than in some other iron-rich amorphous alloys. Effect de was very small for as-quenched samples. When the samples reached the magnetic saturation, the domain structure vanished and then the Hooke's law was valid, i.e. EH = EB = E, where E was then material constant, known as Young's modulus and then the ultrasound velocities are also material constant.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2001
• Tom: Vol. 4
• Strony: 101--104
• Opis fizyczny: Bibliogr. 2 poz., rys.

Twórcy

autor

Kaczkowski Z.

• Polish Academy of Sciences Institute of Physics, Al. Lotników 32/46, PL-02-668 Warszawa, Poland

autor

Muller M.

• Institute for Solid State and Materials Research, Helmholtzstrasse 20, 01-171 Dresden, Germany

autor

Lanotte L.

• Istituto Nazionale per la Fisica delia Materia (INFM), Dipartimento di Scienze Fisiehe, Polo di Ingegneria, Universita di Napoli, Piazzale V, Tecchio 80, 80125 Napoli, Italy

Bibliografia

• 1. L. Lanotte, G. Ausanio, M. Carbucicchio, V. Iannotti and M, Miiller, Coexistence of very soft magnetism and good magnetoelastic coupling in the amorphous Fe 73,5 Cu1 Nb1 Ta2Si13,5 B9 alloy, J. Magn. Magn. Mater. Vols. 215-216, 2000.
• 2. G. Vlasak, Z. Kaczkowski, P.Svec, P. Duhaj, E. Milewska, A. Krzyżewski and E. Danis, Ultrasound velocities in Fe 73,5 Cu1 Nb1 Ta2Si13,5 B9 alloy strips after annealing in vacuum above Curie temperature and their dependence on magnetic field, Mol. Quant. Acoust. Vol. 21, 10 1-108, 2000.