BULK NICKEL-COBALT-BASED GLASSES BEARING CHROMIUM, TANTALUM, PHOSPHORUS AND BORON

摘要

Ni—Co—Cr—Ta—P—B alloys and metallic glasses with controlled ranges are provided. The alloys demonstrate a combination of good glass forming ability, high toughness, and high stability of the supercooled liquid. The disclosed alloys are capable of forming metallic glass rods of diameters at least 3 mm and up to about 8 mm or greater. Certain alloys with good glass forming ability also have high notch toughness approaching 100 MPa m1/2, and stability of the supercooled liquid approaching 60° C.

主权项

1. An alloy capable of forming a metallic glass represented by the following formula (subscripts denote atomic percentages):
Ni(100-a-b-c-d-e)CoaCrbTacPaBe where:
a ranges from 0.5 to 40, b ranges from 3 to 11, c ranges from 1.5 to 4, d ranges from 14 to 17.5, and e ranges from 2 to 5, and wherein the alloy has a critical rod diameter of at least 3 mm.