BULK AMORPHOUS METALLIC ALLOYS - SYNTHESIS BY FLUXING TECHNIQUES AND PROPERTIES

Bulk amorphous alloys having dimensions of at least 1 cm in diameter h ave been prepared in the Pd-Ni-P, Pd-Cu-P, Pd-Cu-Ni-P, and Pd-Ni-Fe-P systems using a fluxing and water-quenching technique. The composition s for bulk glass formation have been determined in these systems. For these bulk metallic glasses, the difference between the crystallizatio n temperature (T-x) and the glass transition temperature (T-g, Delta T = T-x - T-g) ranges from 60 to 110 K. These large values of Delta T o pen the possibility for the fabrication of amorphous near-net-shaped c omponents using techniques such as injection molding. The thermal, ela stic, and magnetic properties of these alloys have been studied, and w e have found that bulk amorphous Pd40Ni22.5Fe17.5P20 has spin glass be havior for temperatures below 30 K.