The effects of as-spun structures on the phase evolutions and magnetic properties of melt-spun Pr_(9.5)Fe_(70.5)Ti_(2)Co_(10)B_(4)C_(4) ribbons

摘要

The phase evolutions and magnetic properties of the rare earth-leaned Pr_(9.5)Fe_(70.5)Ti_(2)Co_(10)B_(4)C_(4) ribbons have been investigated. It was found that melt spinning at different wheel speeds causes the ribbons with distinctive structures. The T_(c) of the three magnetic phases, 2:14:1, alpha-(Fe, Co) and 2:17 phases for the as-spun ribbons be varied with wheel speed V_(s). It was inferred that the C and/or Co concentration in the magnetic phases be different with various V_(s), and the doping elements redistributed in the phases during the annealing process. The annealing treatment significantly improves the magnetic properties for the ribbons prepared at higher wheel speeds.