Magnetic hysteresis properties of melt-spun Nd-Fe-B alloys prepared by centrifugal method / Andreev SV,Kudrevatykh NV,Pushkarsky VI,Markin PE,Zaikov NK,Tarasov EN // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 1998. - V. 187, l. 1. - P. 83-87.

ISSN/EISSN:

0304-8853 / нет данных

Type:

Article

Abstract:

Magnetic hysteresis properties and microstructure peculiarities of melt spun Nd-Fe-B alloys (ribbons) prepared by melt quenching onto the internal surface of an iron spinning wheel at tangential speeds in the range 5-20 m/s are reported. The alloy composition was Nd-36\% wt, B-1.2\% wt, and Fe-remainder. It was found that the coercivity of ribbons does not practically depend on the wheel speed in applied range(18 kOe at 5 m/s and 22 kOe at 20 m/s), whereas the grain size of the basic phase (2-14-1) steadily decreases when the speed rises, starting from 2-3 mu m for 5 m/s alloy down to the 200-300 nm for 20 ms alloy. All ribbons have normal convex demagnetization curves, even those prepared at low wheel speeds (without peculiar step near H similar to 0, which usually exists on such curves for traditionally prepared underquenched melt-spun Nd-Fe-B alloys). Grinding the ribbon in a vibration mill causes the coersivity drop to 7 kOe after 120 min of treatment. However, this operation increases the powder alignment ability and, as a result, the energy product for a fully dense magnet from anisotropic powder prepared from some ribbons rises to 20-23 MGOe. (C) 1998 Elsevier Science B.V. All rights reserved.

Author keywords:

permanent magnets, melt-spun; rare earth-transition metal alloys; magnetization reversal; energy product PERMANENT-MAGNETS; PR-FE

DOI:

10.1016/S0304-8853(97)01145-1

Web of Science ID:

ISI:000074876000011

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	PERMANENT-MAGNETS; PR-FE
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
ResearcherID-Numbers	Markin, Pavel/K-7088-2013
ORCID-Numbers	Markin, Pavel/0000-0002-9537-2303
Number-of-Cited-References	9
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	7
Journal-ISO	J. Magn. Magn. Mater.
Doc-Delivery-Number	101NX