Title :
Magnetic hardening of SmFe10V2 by melt-spinning
Author :
Pinkerton, F.E. ; Van Wingerden, D.J.
Author_Institution :
Gen. Motors Res. Lab., Warren, MI, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
Intrinsic coercivities as large as Hci=7.8 kOe were obtained in Sm-Fe-V alloys magnetically hardened by melt-spinning. As-quenched Sm0.87Fe10V2 ribbons melt-spun at a substrate velocity of 20 m/s have an intrinsic coercivity Hci=6.9 kOe and remanence Br=5.1 kG. The Curie temperature of this material is 585 K. The highest coercivity, Hci=7.8 kOe, was obtained by overquenching an Sm0.95Fe10V2 alloy and subsequently annealing it at 850°C. All peaks except two in the X-ray powder diffraction pattern can be indexed to the ThMn12 structure with lattice constants a=8.506 Å and c=4.779 Å, confirming that the ribbons are principally comprised of the SmFe10V2 phase. The two extra peaks are due to a cubic (Fe,V) compound. Bulk magnets made by hot pressing overquenched Sm 0.89Fe10V2 ribbons reached 98% of the theoretical X-ray density of 7.79 g/cm3, with bulk magnetic properties Hci=5.6 kOe, Br=5.4 kG, and (BH)max=4.0 MGOe
Keywords :
Curie temperature; coercive force; ferromagnetic properties of substances; iron alloys; melt spinning; remanence; samarium alloys; vanadium alloys; 20 m/s; 585 K; 850 C; Curie temperature; SmFe10V2; ThMn12 structure; X-ray powder diffraction pattern; annealing; bulk magnetic properties; density; hot pressing; intrinsic coercivity; lattice constants; magnetic hardening; melt-spinning; overquenching; remanence; substrate velocity; Annealing; Coercive force; Iron alloys; Lattices; Magnets; Powders; Remanence; Samarium alloys; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
