The properties of sub-20-micron Permalloy fiber formed by melt extraction

Author

Rudkowski, P. ; Rudkowska, G. ; Zaluska, A. ; Strom-Olsen, J.O.

Author_Institution

Centre for the Phys. of Mater., McGill Univ., Montreal, Que., Canada

Volume

28

Issue

4

fYear

1992

fDate

7/1/1992 12:00:00 AM

Firstpage

1899

Lastpage

1903

Abstract

Fibers of Permalloy of different compositions have been manufactured in diameters from 5-20 μ using a technique of melt-extraction. The molten material is raised on to the edge of a sharpened rotating molybdenum wheel whose tangential velocity is typically about 60 ms^-1. The surface of fibers is free formed and is almost without defects. The radial cooling and high quenching rates result in a unique crystalline and magnetic microstructure. The fibers show outstanding soft magnetic properties and require no annealing to optimize performance. They also exhibit strong resistance to degradation under mechanical stress and are especially attractive for sensor applications

Keywords

Permalloy; coercive force; crystal microstructure; ferromagnetic properties of substances; fibres; magnetic hysteresis; magnetic permeability; melt spinning; rapid solidification; 5 to 20 micron; Permalloy fiber; coercivity; crystalline fibers; crystalline microstructure; high quenching rates; magnetic hysteresis loop; magnetic microstructure; mechanical stress; melt extraction; permeability; radial cooling; resistance to degradation; sensor applications; soft magnetic properties; Cooling; Crystal microstructure; Crystalline materials; Crystallization; Magnetic properties; Manufacturing; Micromagnetics; Optical fiber sensors; Surface resistance; Wheels;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.144745

Filename

144745