BULK GLASS-FORMATION IN THE PD-NI-P SYSTEM

Bulk amorphous Pd-Ni-P rods with diameters ranging from 10 to 25 mm we re prepared by a fluxing technique over a wide composition range. For most bulk glassy alloys studied, the difference between the glass tran sition temperature and the crystallization temperature, T-x-T-g, is la rger than 90 K. Of all the alloy compositions examined, Pd40Ni40P20 ha s the highest glass formability, and 300-g bulk amorphous cylinders, 2 5 mm in diameter and 50 mm in length, were easily and repeatedly forme d. This size, however, is not an upper limit. The elastic properties o f these bulk amorphous alloys were determined by a resonant ultrasound spectroscopy technique.