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Abstract:
The bulk nanocrystalline Nd-Fe-B magnets in forms of rod and slab with various surface area-to-volume ratios (defined as S/V) were prepared by injection casting into copper molds. The effects of the surface area-to-volume ratio and the application of magnetic field during the casting process on the magnetic properties and microstructure of Nd9.5Fe71.5Ti2.5Zr0.5Cr1B14.5C0.5 alloy have been studied. The results show that the samples that have larger S/V values exhibit higher H-i(c) and BHmax. The intrinsic coercivity of bulk magnet is more sensitive to the cooling rate of alloy melt than the remanence. The slab-shaped sample cast with magnetic field has a stronger (00L) texture of Nd2Fe14B phase with the c-axis perpendicular to the slab plane than the slab-shaped sample cast without magnetic field. Applying a magnetic field during the casting process is helpful to refine the grain size, thus improving the magnetic properties.
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IEEE TRANSACTIONS ON MAGNETICS
ISSN: 0018-9464
Year: 2011
Issue: 10
Volume: 47
Page: 3263-3266
1 . 3 6 3
JCR@2011
2 . 1 0 0
JCR@2023
ESI Discipline: PHYSICS;
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 7
SCOPUS Cited Count: 7
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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