Title of Thesis
ENHANCEMENT OF MAGNETIC PROPERTIES BY ALLOYING AND PROCESSING OF Fe-28Cr-15Co SYSTEM
Author(s)
Zubair Ahmad
Institute/University/Department Details
Bahauddin Zakariya University
Session
2001
Subject
Materials science
Number of Pages
108
Keywords (Extracted from title, table of contents and abstract of thesis)
isotropic magnets, sintered magnets, magnetic field, anisotropic magnets, isotropic magnets
Abstract
Magnetic properties in Fe-28Cr-150Co based alloys were enhanced by addition of ferromagnetic α-phase forming elements like Mo,Ti, Al, V,Si and by optimizing the hear treatment conditions. The isotropic Fe-28Cr-15Co-3. Mo-1.8 Ti magnets have produced the highest coercivity , Hc =792Oe(63kA/m), which is superior to the reported coercivities in isotropic magnets of Fe-Cr-Co system containing 15-25wt%Co. The anisotropic Fe-28-Cr-15Co-33Mo-1.8Ti magnets have produced maximum magnetic properties as coercive force of 970Oe (77.2 kA/m), remanence of 11.2kG(1.12T) and energy product of 601 MG.Oe(48.6kJ/m3). The anisotropic Fe.28Cr-15Co-33.5Mo-1.8Ti magnets have potential to replace Co-Steel, Vicalloy, Cunico, Ferrites and Alnico 7 magnets in term of cheaper material composition, better corrosion resistance, good ductility, butter temperature stability and better magnetic properties
The process and material used to produce Fe-28-Cr-15Co based magnets are easy and economical, which can be sued for the mss production of. Fe-CR-Co magnets with high energy products Small and complex shape magnets can be made with Fe-28Cr-15-Co alloys, which are difficult to fabricate with ceramic, and powder metallurgy produced magnets
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