Landolt-Börnstein - Group III Condensed Matter Fe-Cu magnet alloys


This chapter discusses magnetic properties of Fe-Cu magnet alloys. In contrast to other magnet alloy system, the Fe-Cu binary system has not a single-phase region in the solid state even at high temperatures. An evaporization and deposition technique was therefore used in order to obtain a finely separated two-phase (ferro- and non-magnetic) state. Casting in a vibrating mold is also used for the fine phase separation. Survey of magnetic properties of Fe-Cu alloys in relation to the preparation technique is tabulated. The preparation techniques include vapour deposition (VD), annealing (AN), casting (CA), hot-working (HW), cold-working (CW), aging (AG), and water quenching (WQ). The metallurgical structures for these alloys are also described. Lattice constant of the bcc phase of (100-x) Fe-xCu is presented. Composition dependence of the saturation magnetization Ms and coercive force BHc of (100-x)Fe-xCu, and remanent magnetic induction Br and the coercive force of xFe-(100-x)Cu are figured out. Demagnetization curves and energy products of Fe-Cu-Mn-Si-C is illustrated. Influence of the final aging temperature Ta and the annealing time on the magnetic properties of Fe-Cu-Mn is also figured out. Influence of the annealing temperature on the remanent magnetic induction Br, coercive force BHc of Fe-Cu-Mn-Si-C, and uniaxial and the cubic anisotropy constants Lu and Lc in Fe-Cu-Mn are shown. Influence of annealing time ta on the coercive force BHc of Fe-Cu and influence of the reduction in area Ra on the magnetic properties of Fe-Cu-Mn and Fe-Cu-Mn-Si-C are also illustrated.

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Title Fe-Cu magnet alloys
Book Title
Magnetic Alloys for Technical Applications. Hard Magnetic Alloys
7.2.1 Magnet alloys based on 3d elements
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Landolt-Börnstein - Group III Condensed Matter
  • H. P. J. Wijn
  • Authors
  • T. Nakamichi
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