Nd8Fe73Co5Hf2B12 strip cast alloy

Nd8Fe73Co5Hf2B12 alloys were cast as strips (thick continuous ribbons with thickness t=100-160 mu m) by a chill disk melt spinning technique (v(disk)= 3 m/s) from a master alloy prepared by arc melting (A) and from two preallo yed components (B). Samples obtained by the B procedure revealed in the as- cast state, good magnetic properties with an unusually high value of the co ercivity, H-c=10.3 kOe, for the substoichiometric Nd2Fe14B system. A high d egree of structural refinement and a homogeneous dispersion of the phases a re attained in sample B. The strength and type of magnetic interactions bet ween the grains are presented by delta M and irreversible susceptibility pl ots. (C) 2000 American Institute of Physics. [S0021-8979(00)90808-9].