Landolt-Börnstein - Group III Condensed Matter

7.2.2.5 Sm-Co-Cu-Fe- (M) magnet alloys, M = Ti, Zr, Mn, Ni, Hf

Abstract

This chapter discusses the properties of Sm-Co-Cu-Fe-(M) magnet alloys, M = Ti, Zr, Mn, Ni, Hf. The simultaneous substitution of Cu and Fe appears to be beneficial both for the coercivity and the magnetization of the alloys of the type SmCo. Influence of Sm content on the magnet properties SmCoCuFe, influence of aging on the intrinsic coercive force MHc of SmCoCuFe, influence of Fe content on the permanent magnet properties of cast anisotropic samples annealed for 4 h at 400ºC and demagnetization curves of SmCoCuFe are illustrated. Part of the equilibrium phase diagram for alloys with a fixed Fe and Cu content of Sm-Co-Cu-Fe, hysteresis loops for various gradually increasing maximum magnetization strengths and demagnetization curve at various temperatures of Sm(CoCuFe), influence of aging time ta at aging temperature Ta, on the development of the coercive force MHc of Sm(CoCuFeZr), and intrinsic coercive force MHc versus aging time ta of Sm-Co-Cu-Fe-Zr are figured out. Survey of observed maximum energy products (BH)max and remanent induction values Br, for anisotropic permanent magnets of the compositions Sm-Co-Cu-Fe-(Zr,Hf) is tabulated. Demagnetization curves of a Sm(CoCuFeZr) type sintered magnets after optimum treatment, typical intrinsic and normal demagnetization curves for commercial anisotropic magnets sintered at various temperatures Sm(CoCuFeZr), and demagnetization curves and recoil curve of Sm(CoCuFeNi) are shown.

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Title
7.2.2.5 Sm-Co-Cu-Fe- (M) magnet alloys, M = Ti, Zr, Mn, Ni, Hf
Book Title
Magnetic Alloys for Technical Applications. Hard Magnetic Alloys
In
7.2.2 Rare earth - 3d magnet alloys
Book DOI
10.1007/b41058
Chapter DOI
10.1007/10028076_40
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
19I2
Editors
  • H. P. J. Wijn
  • Authors
  • D. Bonnenberg
  • H. P. J. Wijn
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