PHASE-TRANSITION BEHAVIOR AND CORROSION-RESISTANCE OF ND2.5FE13COC1.425B0.075 AND RELATED-COMPOUNDS

The global permanent magnet markets are several billion dollars a year . Anisotropic NdFeB magnets, the strongest ones, are made by sintering or by hot pressing of amorphous ribbons. Our aim is to obtain anisotr opic bulk material by casting and applying a thermo-mechanical treatme nt. Nd2.5Fe13CoC0.95B0.05 was found to be a promising composition with a nearly complete phase transition between 850 degrees C and 1080 deg rees C. The time temperature transition behaviour of Nd2.5Fe13CoC0.95B 0.05 was investigated. First thermo-mechanical experiments were made. The orientation of the crystallites is caused mainly by plastic deform ation and not by uniaxial pressure.