Patent ID: 7482065

Claim:
A multi-layered metallic material comprising: at least three or more alternating layers of: (a) a metallic glass layer comprising an iron based alloy that has a hardness of at least about 9.2 GPa wherein said alloy comprises one or more materials selected from the group consisting of (Fe 0.85 Cr 0.15 ) 83 B 17 , (Fe 0.8 Cr 0.2 ) 83 B 17 , (Fe 0.75 Cr 0.25 ) 83 B 17 , (Fe 0.6 Co 0.2 Cr 0.2 ) 83 B 17 , (Fe 0.8 Cr 0.15 Mo 0.05 ) 83 B 17 , (Fe 0.8 Cr 0.2 ) 79 B 17 C 4 , (Fe 0.8 Cr 0.2 ) 79 B 17 Si 4 , (Fe 0.8 Cr 0.2 ) 79 B 17 Al 4 , (Fe 0.8 Cr 0.2 ) 75 B 17 Al 4 C 4 , (Fe 0.8 Cr 0.2 ) 75 B 17 Si 4 C 4 , (Fe 0.8 Cr 0.2 ) 75 B 17 Si 4 Al 4 , (Fe 0.8 Cr 0.2 ) 71 B 17 Si 4 C 4 Al 4 , (Fe 0.7 Co 0.1 Cr 0.2 ) 83 B 17 , (Fe 0.8 Cr 0.2 ) 80 B 20 , (Fe 0.8 Cr 0.2 ) 76 B 17 Al 7 , (Fe 0.8 Cr 0.2 ) 79 B 17 W 2 C 2 , (Fe 0.8 Cr 0.2 ) 81 B 17 W 2 , and Fe 64 Ti 3 Cr 5 Mo 2 B 16 C 5 Si 1 Al 2 La 2 ; and (b) a metal layer having a hardness of less than about 9.2 GPa, wherein said metal layer comprises aluminum, or aluminum alloys, wherein said metallic glass layer is bonded directly to said metal layer with a bond strength of at least about 5,000 psi, wherein said alternating layers individually have a thickness between about 50 μm to 500 μm.