Directly quenched nanocrystalline (Pr,Dy)–(Fe,Co)–Zr–Ti–B magnets

► Pr9−xDyxFe60Co13Zr1+yTi3−yB14 (x=0, 1 and y=0, 1) alloys shown changes of magnetic properties with the shape of rapidly solidified samples. ► Two crystalline phases precipitate during rapid solidification: the hard magnetic Pr2(Fe,Co)14B and paramagnetic Pr1+ɛFe4B4 and majority amorphous. ► The be...

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Bibliographic Details
Published in:Journal of alloys and compounds 2012-09, Vol.536 (SUPPL.1), p.S342-S347
Main Authors: Pawlik, P., Pawlik, K., Wysłocki, J.J., Kaszuwara, W., Ferenc, J.
Format: Article
Language:English
Subjects:
Alloys
Annealing
Coercive force
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Glass
Magnetic properties
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Mössbauer effect
other γ-ray spectroscopy
Mössbauer spectroscopy
Permanent magnets
Physics
Rapid solidification
Ribbons
Rods
Titanium
Transmission electron microscopy
X-ray diffraction
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Summary:► Pr9−xDyxFe60Co13Zr1+yTi3−yB14 (x=0, 1 and y=0, 1) alloys shown changes of magnetic properties with the shape of rapidly solidified samples. ► Two crystalline phases precipitate during rapid solidification: the hard magnetic Pr2(Fe,Co)14B and paramagnetic Pr1+ɛFe4B4 and majority amorphous. ► The best magnetic properties in group of ribbons containing 2at.% of Zr. ► Better glass forming abilities of 1at.% of Zr alloys thus improvement of magnetic properties of bulk samples. ► Dy admixture improves the coercivity field. Studies of rapidly solidified Pr9−xDyxFe60Co13Zr1+yTi3−yB14 (where x=0, 1 and y=0, 1) thick ribbons, 1mm diameter (dia.) rods and 3mm outer diameter (o.d.) tubes show good hard magnetic properties in as-cast state. Change of Ti to Zr ratio results in variation of the glass forming abilities that has significant impact on magnetic properties. Low temperature annealing at 573K/10min of the Pr9Fe60Co13Zr1Ti3B14 alloy samples resulted in an improvement of their coercivity field. The X-ray diffractometry and Mössbauer spectroscopy allowed determining the volume fractions of constituent phases formed during rapid quenching.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2011.12.005