Title :
High temperature 2:17 magnets: relationship of magnetic properties to microstructure and processing
Author :
Hadjipanayis, G.C. ; Tang, Wei ; Zhang, Y. ; Chui, S.T. ; Liu, J.F. ; Chen, C. ; Kronmüller, H.
Author_Institution :
Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
A comprehensive and systematic study on Sm(CobalFevCuyZrx)z magnets is made to completely understand the effects of composition and processing on their magnetic properties. These studies include the compositions required for the formation of cellular/lamellar microstructure, the effects of compositions (x, y, v, z) and processing (aging temperature and time) on microstructure and magnetic properties, the evolution of microstructure and magnetic properties and the magnetic hardening. All of these effects and results may be summed up as changing microstructure and microchemistry, which leads to a variation of the distribution and amount of Cu at the 1:5 cell boundaries. This becomes the most predominant factor controlling the pinning strength and therefore the coercivity and its temperature dependence
Keywords :
ageing; cobalt alloys; coercive force; copper alloys; crystal microstructure; ferromagnetic materials; iron alloys; magnetic anisotropy; permanent magnets; samarium alloys; zirconium alloys; 1:5 cell boundaries; Sm(CobalFevCuyZrx) z magnets; SmCoFeCuZr; aging temperature; cellular/lamellar microstructure; coercivity; composition; hard magnetic materials; high temperature 2:17 magnets; magnetic hardening; magnetic properties; magnetocrystalline anisotropy; microchemistry; permanent magnets; pinning strength; processing; temperature dependence; Aging; Coercive force; Iron; Magnetic materials; Magnetic properties; Magnets; Microstructure; Saturation magnetization; Temperature dependence; Zirconium;
Journal_Title :
Magnetics, IEEE Transactions on
