Magnetism, Structure and the Effects of Thermal Aging on (Fe1-xMnx)73.5Si13.5B9Nb3Cu1 Alloys

Abstract

Amorphous alloys of (Fe(1-x)Mn(x)) (73.5) Si(13.5)B(9) Nb(3)Cu(1), where chi = 0, 0.05, 0.10, 0.15, were prepared by vacuum melt-spinning. Anneals performed at or above the crystallization temperature led to the formation of a nanostructure where the primary phase is a body centered cubic or DO(3) FeSi phase embedded within an intergranular amorphous phase. The saturation induction of the chi = 0.05 alloy is 1.19 T, slightly lower than the parent alloy. Prolonged thermal aging led to an enhancement in the soft magnetic properties. This change occurs at soak times near 6000 s and corresponds to a decrease in the anisotropy and coercivity, and an increase in the remanent magnetization. EXAFS studies suggest that the Mn partitions during crystallization and thermal aging to the grain boundary regions may play an important role in enhancing the exchange coupling of the aged samples by increasing the Curie temperature of the amorphous intergranular phase.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2001
Accession Number
ADA516299

Entities

People

  • A. C. Hsiao
  • B. N. Das
  • E. E. Carpenter
  • J. H. Claassen
  • L. K. Kurihara
  • M. A. Willard
  • M. E. Mchenry
  • M. M. Miller
  • Michelle R. Tamoria
  • R. K. Everett
  • Rhonda Stroud
  • Vincent G. Harris

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Anisotropy
  • Coercivity
  • Couplings
  • Curie Temperature
  • Fiber Spinning
  • Grain Boundaries
  • Grain Size
  • Heat Treatment
  • Magnetic Properties
  • Materials
  • Materials Science
  • Measurement
  • Military Research
  • Permeability
  • Physical Properties
  • X Rays
  • X-Ray Diffraction

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics