BULK PLATINUM-COPPER-PHOSPHORUS GLASSES BEARING BORON, SILVER, AND GOLD

摘要

The disclosure provides Pt—Cu—P glass-forming alloys bearing at least one of B, Ag, and Au, where each of B, Ag, and Au can contribute to improve the glass forming ability of the alloy in relation to the alloy that is free of these elements. The alloys are capable of forming metallic glass rods with diameters in excess of 3 mm, and in some embodiments 50 mm or larger. The alloys and metallic glasses can satisfy platinum jewelry hallmarks PT750, PT800, PT850, and PT900.

主权项

1. An alloy capable of forming a metallic glass comprising:
Pt having an atomic fraction in the range of 45 to 75 percent, where the weight fraction of Pt does not exceed 91 percent; Cu having an atomic fraction in the range of 3 to 35 percent; P having an atomic fraction in the range of 14 to 26 percent; at least one additional element selected from the group consisting of Ag, Au, and B where the atomic fraction of each of the at least one additional elements is in the range of 0.05 to 7.5 percent; one optional element selected from the group consisting of Ni and Co, where the combined atomic fraction of Ni and Co is less than 2 percent; and wherein the critical rod diameter of the alloy is at least 3 mm.