Effect of roll speed on the magnetic properties of nanocomposite PrFeB magnets prepared by melt-spinning

Rapid solidified Pr x Fe 94− x B 6 alloys, with x ranging from 6 to 10 at%, were prepared by melt-spinning at several roll speeds to obtain nanocomposite PrFeB magnets with enhanced properties. Magnetic properties and grain-size measurements were performed on as-cast ribbons and were correlated to r...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1999-11, Vol.206 (1), p.37-44
Main Authors: Mendoza-Suárez, G, Escalante-Garcı́a, J.I, López-Cuevas, J, Vargas-Gutiérrez, G, Mancha-Molinar, H, Mendez-Nonell, J
Format: Article
Language:English
Subjects:
Alloys
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Fine-particle systems
Magnetic properties
Magnetic properties and materials
Magnetization curves, hysteresis, Barkhausen and related effects
Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects
Melt-spinning
Metals. Metallurgy
Nanocomposite magnets
Permanent magnets
Physics
Small particles and nanoscale materials
Studies of specific magnetic materials
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Summary:Rapid solidified Pr x Fe 94− x B 6 alloys, with x ranging from 6 to 10 at%, were prepared by melt-spinning at several roll speeds to obtain nanocomposite PrFeB magnets with enhanced properties. Magnetic properties and grain-size measurements were performed on as-cast ribbons and were correlated to roll speed. It was found that the greatest J r enhancement occurred at roll speeds that led to grain sizes below ∼30 nm. Deviations from this optimum value, caused either by partial amorphisation or grain coarsening, greatly affected the values of J r, jH c and ( BH) max.
ISSN:0304-8853
DOI:10.1016/S0304-8853(99)00516-8