Effects of boron substitution on the structural and magnetic properties of melt-spun Sm(Co,Fe,Zr)(7.5) and Sm(Co,Fe,Zr,Cu)(7.5) magnets (Journal article)

Makridis, S. S./ Litsardakis, G./ Panagiotopoulos, I./ Niarchos, D./ Hadjipanayis, G. C.


In this work we examine the effect of small boron substitution (x=0, 0.005, 0.010, 0.015) on the structural and magnetic properties of Sm(Co0.86-xFe0.1Zr0.04Bx)(7.5) and Sm(Co0.74-xFe0.1Cu0.12Zr0.04Bx)(7.5) melt-spun samples, as a function of wheel speed and annealing conditions. Boron substituted as-spun ribbons are found to have increased coercivity, Hc>5 kOe, and small grain size of 60-100 nm. For copper containing samples, the highest coercivity (Hc=16.3 kOe) was obtained in as-spun ribbons with x=0.015. In samples without copper the coercivity increased after short annealing (Hc=12 kOe for x=0.015). The large coercivities are attributed to a fine microstructure consisting mainly of hexagonal TbCu7-type phase and a small amount of soft-phase grains. (C) 2002 American Institute of Physics.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών
URI: http://olympias.lib.uoi.gr/jspui/handle/123456789/13883
ISSN: 0021-8979
Link: <Go to ISI>://000175576400025
Publisher: American Institute of Physics
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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