Amorphous Alloy and A Preparation Method Thereof

Abstract

In one aspect, an amorphous alloy comprises Cu, Zr, Be and M. M is at least one element selected from a group consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB and group VIIIB of the element periodic table, provided that the element is not Cu or Zr. In another aspect, an amorphous alloy comprises Cu, Zr, RE and M. RE is at least one element selected from the rare earth elements, M is at least one element selected from a group consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB and group VIIIB of the element periodic table, provided that the element is not Cu, Zr or RE. In yet another aspect, a method for preparing an amorphous alloy comprises melting a raw material comprising Cu, Zr, Be, and M to form an alloy. M is at least one element selected from a group consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB and group VIIIB of the element periodic table, provided that the element is not Cu or Zr.

1 . An amorphous alloy, comprising:
 Cu, Zr, Be and M;   wherein M is at least one element selected from a group consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB and group VIIIB of the element periodic table, provided that the element is not Cu or Zr.   
   
   
       2 . The amorphous alloy of  claim 1 , wherein the atomic ratio of Cu to Zr is about 0.5 to 1.0. 
   
   
       3 . The amorphous alloy of  claim 1 , which comprises about 15-45 atomic percent of Cu, about 10-50 atomic percent of Zr, less than about 30 atomic percent of Be, and about 5-35 atomic percent of M. 
   
   
       4 . The amorphous alloy of  claim 3 , which comprises about 30-45 atomic percent of Cu, about 30-40 atomic percent of Zr, about 0.01-10 atomic percent of Be, and about 5-25 atomic percent of M. 
   
   
       5 . The amorphous alloy of  claim 1 , wherein M is at least one element selected from a group consisting of Al, Sn, Si, Ti, Ag, Ni, Ta, Hf, Co, Fe, Nb and Y. 
   
   
       6 . An amorphous alloy, comprising:
 Cu, Zr, RE and M;   wherein RE is at least one element selected from the rare earth elements, M is at least one element selected from a group consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB and group VIIIB of the element periodic table, provided that the element is not Cu, Zr or RE.   
   
   
       7 . The amorphous alloy of  claim 6 , wherein M comprises Ti and Al. 
   
   
       8 . The amorphous alloy of  claim 7 , which comprises about 15-45 atomic percent of Cu, about 10-50 atomic percent of Zr, about 0.1-10 atomic percent of Ti, about 1-20 atomic percent of Al, and about 0.01-10 atomic percent of RE. 
   
   
       9 . The amorphous alloy of  claim 6 , which comprises about 15-40 atomic percent of Cu, about 20-40 atomic percent of Zr, about 15-30 atomic percent of Be, and about 10-35 atomic percent of M. 
   
   
       10 . The amorphous alloy of  claim 6 , which comprises about 20-30 atomic percent of Cu, about 30-40 atomic percent of Zr, about 20-25 atomic percent of Be, and about 15-30 atomic percent of M. 
   
   
       11 . A method for preparing an amorphous alloy comprising:
 melting a raw material comprising Cu, Zr, Be, and M to form an alloy;
 wherein M is at least one element selected from a group consisting of Al, Sn, Si, group IB, group IIB, group IIIB, group IVB, group VB, group VIB, group VIIB and group VIIIB of the element periodic table, provided that the element is not Cu or Zr. 
   
   
   
       12 . The method of  claim 11 , wherein the raw material comprises about 15-45 atomic percent of Cu, about 10-50 atomic percent of Zr, less than about 30 atomic percent of Be, and about 5-35 atomic percent of M. 
   
   
       13 . The method of  claim 11 , wherein M is at least one element selected from a group consisting of Al, Sn, Si, Ti, Ag, Ni, Ta, Hf, Co, Fe, Nb and Y. 
   
   
       14 . The method according to  claim 11 , wherein the melting step comprises:
 melting the raw material to form a molten mixture;   cooling the molten mixture to form at least one ingot; and   re-melting the at least one ingot to form the amorphous alloy.   
   
   
       15 . The method according to  claim 11 , wherein the raw material is melted under a vacuum of about 0.01-1000 Pa. 
   
   
       16 . The method according to  claim 11 , wherein the raw material is melted under a vacuum of no more than about 200 Pa. 
   
   
       17 . The method according to  claim 11 , wherein the raw material is melted at a temperature of about 1,500-2,500° C. 
   
   
       18 . The method according to  claim 11 , wherein the raw material is melted at a temperature of about 700-2,000° C. 
   
   
       19 . The method according to  claim 11 , wherein the cooling speed of the cooling molding process is about 10-10 4  K/s. 
   
   
       20 . The method according to  claim 11 , wherein the raw material is melted in the presence of an inert gas. 
   
   
       21 . The method according to  claim 11 , wherein the purity of Cu, Zr, M and Be is about 98%. 
   
   
       22 . The method according to  claim 11 , wherein the purity of Cu, Zr, M and Be is about 99.9%.