Patent ID: 7323071
Filing Date: 2008-01-29
Classification: C22C,C23C

Abstract:
1. A method of forming a hardened surface on a substrate, comprising: providing a substrate; and forming a molten alloy and cooling said alloy to form a metallic glass coating on the substrate, the forming comprising forming a successive buildup of metallic glass layers, the metallic glass coating having a hardness of at least about 9.2 GPa, and comprising an alloy consisting of at least 50% iron, optionally chromium, one or more elements selected from the group consisting of boron and phosphorous, one or both of molybdenum and tungsten; and at least one member of the group consisting of Ga, Ge, Au, Zr, Hf, Nb, Ta, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, N, S, and O.