Effect of quench rate on nanostructure and magnetic properties of PrCo 5

W. Y. Zhang, R. Skomski, X. Z. Li, S. Valloppilly, J. Shield, David J. Sellmyer

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The effect of quench rate on nanostructure and magnetic properties of PrCo5 alloy has been investigated. The increase of quench rate through wheel speed in melt spinning suppresses the formation of the secondary Pr2Co17 and Pr5Co19 phases with low magnetocrystalline anisotropy field and refines the nanostructure. This significantly improves the coercivity, remanence, and energy product. For example, increasing the wheel speed from 30 m/s to 70 m/s increases the coercivity and energy product from 3.2 kOe and 4.0 MGOe to 10.3 kOe and 13.7 MGOe, respectively. The magnetic hardening mechanism appears to be a mixture of reversed-domain-nucleation and domain-wall-pinning. The temperature coefficient of coercivity for the 70 m/s sample is -0.16%/K from 300 to 700 K, which is better than that of sintered SmCo5 magnets. Low temperature coefficients of coercivity and remanence indicate that rapidly quenched PrCo5 ribbons may be suitable for bonded magnets with high operation temperature.

Original languageEnglish (US)
Article number17A731
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
StatePublished - May 7 2014

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coercivity
magnetic properties
remanence
wheels
magnets
melt spinning
coefficients
products
hardening
ribbons
domain wall
nucleation
anisotropy
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Effect of quench rate on nanostructure and magnetic properties of PrCo 5. / Zhang, W. Y.; Skomski, R.; Li, X. Z.; Valloppilly, S.; Shield, J.; Sellmyer, David J.

In: Journal of Applied Physics, Vol. 115, No. 17, 17A731, 07.05.2014.

Research output: Contribution to journalArticle

Zhang, W. Y. ; Skomski, R. ; Li, X. Z. ; Valloppilly, S. ; Shield, J. ; Sellmyer, David J. / Effect of quench rate on nanostructure and magnetic properties of PrCo 5. In: Journal of Applied Physics. 2014 ; Vol. 115, No. 17.
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