Nanocomposite Nd-Fe carbides made by melt-spinning

Author

Daniil, M. ; Okumura, H. ; Hadjipanayis, G.C. ; Thomas, R.A. ; Sellmyer, D.

Author_Institution

Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3315

Lastpage

3317

Abstract

The effect of wheel speed and annealing including rapid thermal annealing were examined on the magnetic and structural properties of Nd ₁₅Fe_78.5C_5.5B ribbons. Optimal coercivities in the range of 10-14 kOe have been obtained for different wheel speeds. However, the magnetic hysteresis loops of the conventionally heat-treated ribbons often show a step in the demagnetization curve, which was found to be correlated with the presence of large regions with bcc Fe structure. These regions can be shrunk significantly by using the method of the rapid annealing resulting in the elimination of the step

Keywords

boron alloys; coercive force; demagnetisation; iron alloys; magnetic hysteresis; melt spinning; neodymium alloys; permanent magnets; rapid thermal annealing; Nd₁₅Fe_78.5C_5.5B; coercivity; demagnetization curve; magnetic hysteresis loops; melt-spinning; nanocomposite carbides; rapid thermal annealing; ribbons; wheel speed; Argon; Crystallization; Iron alloys; Magnetic properties; Microstructure; Neodymium; Rapid thermal annealing; Temperature; Wheels; X-ray diffraction;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908783

Filename

908783