H-j(c), J(r) and (BH)(max) relationship in PrFeB melt spun alloys

H-j(o), J(r) and (BH)(max) correlations were experimentally studied for a s eries of PrxFe94-xB6 alloys, with x ranging from 6 to 20 at%. The results s how that the variation of the Pr content and the casting parameters yielded to H-j(c) ranging from values near 0 to similar to 2200 kA/m. J(r) increas ed at the expense of H-j(c) in agreement with some theoretical investigatio ns related to J(r)/H-j(c) relationship. This behaviour changed for H-j(c) v alues lower than similar to 200kA/m, where J(r) and H-j(c) diminish togethe r. (BH)(max) showed a similar behaviour to J(r) up to values of H-j(c) simi lar to 450kA/m (30% alpha-Fe) where a maximum was observed and then a decre ase with reducing H-j(c). The results are analysed and discussed based on t heoretical and experimental investigations carried out by some other worker s and compared with results reported for the NdFeB system. (C) 2000 Elsevie r Science B.V. All rights reserved.