Metallic glass

Abstract

A metallic glass having a general formula of Zr 15-65 Cu 0-25 Ni 0-20 Al 0-30 Hf 0-30 Ti 0-30 Co 0-30 .

1 . A metallic glass having a general formula of Zr 15-65 Cu 0-25 Ni 0-20 Al 0-30 Hf 0-30 Ti 0-30 Co 0-30 . 
     
     
         2 . The metallic glass of  claim 1 , wherein the metallic glass is a bulk metallic glass. 
     
     
         3 . The metallic glass of  claim 2 , wherein the metallic glass is selected from the group consisting of: Zr 59±2 Cu 16±2 Ni 12±2 Al 10±2 Hf 2.5±0.5 Ti 0.5±0.3 , Zr 55±2 Cu 20±2 Al 15±2 Co 10±1 , Zr 54±2 Ni 16±2 Cu 14±2 Ti 10±2 Al 6±1 , Zr 55±2 Cu 20±2 Co 10±2 Ti 8±2 Al 7±1 , Zr 55±2 Cu 20±2 Ti 10±1 Co 10±1 Al 5±1 , and Zr 45±2 Cu 20±2 Ti 10±2 Al 10±2 Co 10±2 Hf 5±1 . 
     
     
         4 . The metallic glass of  claim 3 , wherein the metallic glass is selected from the group consisting of: Zr 59.2 Cu 16.2 Ni 12.6 Al 9.6 Hf 2.2 Ti 0.2 , Zr 55 Cu 20 Al 15 Co 10 , Zr 54 Ni 16 Cu 14 Ti 10 Al 6 , Zr 55 Cu 20 Co 10 Ti 8 Al 7 , Zr 55 Cu 20 Ti 10 Co 10 Al 5 , and Zr 45 Cu 20 Ti 10 Al 10 Co 10 Hf 5 . 
     
     
         5 . The metallic glass of  claim 2  in the form of a rod. 
     
     
         6 . The metallic glass of  claim 5 , wherein the metallic glass has an average diameter of about 1 mm to about 5 mm. 
     
     
         7 . The metallic glass of  claim 1 , wherein the metallic glass is a ribbon metallic glass. 
     
     
         8 . The metallic glass of  claim 7 , wherein the metallic glass is selected from the group consisting of: Zr 16.67 Hf 16.67 Al 16.67 Co 16.67 Ni 16.67 Cu 16.67 , Zr 20 Hf 20 Al 20 Co 20 Cu 20 , Zr 25 Hf 25 Al 25 Co 25 , Ti 20 Zr 20 Hf 20 Al 20 Co 20 , Ti 16.67 Zr 16.67 Hf 16.67 Al 16.67 Co 16.67 Ni 16.67 , and Ti 25 Zr 25 Hf 25 Co 25 . 
     
     
         9 . The metallic glass of  claim 1 , wherein the metallic glass has an average thickness of about 10 μm to about 100 μm. 
     
     
         10 . The metallic glass of  claim 1  having a hardness of about 4 GPa to about 9 GPa. 
     
     
         11 . The metallic glass of  claim 1 , wherein the metallic glass is non-toxic. 
     
     
         12 . The metallic glass of  claim 1 , wherein the metallic glass is metalloid-free. 
     
     
         13 . A method of fabricating the metallic glass of  claim 1 , comprising:
 melting a mixture essentially consisting of, in atomic percentage,
 about 15% to about 65% of Zr, 
 0% to about 25% of Cu, 
 0% to about 20% of Ni, 
 0% to about 30% of Al, 
 0% to about 30% of Hf, 
 0% to about 30% of Ti, and 
 0% to about 30% of Co; and 
   quenching the molten mixture in a mold to form a casted metallic glass.   
     
     
         14 . The method of  claim 13 , wherein the melting is performed in an arc-melting furnace with a vacuum level of up to 8×10 −4  Pa. 
     
     
         15 . The method of  claim 13 , wherein the metallic glass is a ribbon metallic glass, and the method further includes:
 melting the casted metallic glass; and   melt spinning the molten mixture.   
     
     
         16 . The method of  claim 15 , wherein the melt spinning is performed in an induction-melting furnace with a vacuum level of up to 8×10 −4  Pa. 
     
     
         17 . The method of  claim 15 , wherein the melt spinning is performed at a rotating speed of about 60 r/s to about 90 r/s.