2006 Volume 47 Issue 9 Pages 2399-2404
The effects of Zr and C additions on the magnetic properties and microstructures of melt-spun Nd8Fe85−xZrxB7−yCy (x=0–3,y=0,1) alloy ribbons were investigated. The cooling rates of melts and the heat treatment conditions were varied to optimize the hard magnetic properties. The C addition improved remanence and the Zr addition suppressed the undesirable crystallization of Nd2Fe17Cx during heat treatment. The (BH)max of 135 kJ/m3 was obtained for an optimally heat-treated Nd8Fe83Zr2B6C1 ribbon.