Cu-based amorphous matrix composite materials containing high fusion point element and production method thereof

Abstract

In Cu-based bulk amorphous matrix composite materials, comprising a Cu-based amorphous alloy containing high fusion point element(s) selected from a group of Ta, W or combination thereof, wherein the high fusion point element(s) has(have) a shape of crystalline grain and is(are) dispersed around a Cu-based amorphous matrix. Cu-based bulk amorphous matrix composite materials have the composition expressed as the following Chemical formula 1; Cu a Zr b Ti c R d   [Chemical Formula 1] where R is Ta, W or combination thereof, a, b, c and d are atomic weight ratio, a+b+c+d equals 100, a, b, c, and d have the range of 45≦a≦65, 10≦b≦35, 5≦c≦30, and 5≦d≦10, respectively.

What is claimed is:  
     
         1 . Cu-based bulk amorphous matrix composite materials, comprising a Cu-based amorphous alloy containing high fusion point element(s) selected from a group of Ta, W or combination thereof, wherein the high fusion point element(s) has(have) a shape of crystalline grain and is(are) dispersed around a Cu-based amorphous matrix.  
     
     
         2 . Cu-based bulk amorphous matrix composite materials as claimed in  claim 1 , wherein the Cu-based amorphous matrix composite materials have the composition expressed as the following Chemical formula 1;  
       Cu a Zr b Ti c R d    [Chemical formula 1] 
       where R is Ta, W or combination thereof, a, b, c and d are atomic weight ratio, a+b+c+d equals 100, a, b, c, and d have the range of 45≦a≦65, 10≦b≦35, 5≦c≦30, and 5≦d≦10, respectively.  
     
     
         3 . Cu-based bulk amorphous matrix composite materials as claimed in  claim 1 , wherein the Cu-based amorphous matrix has above 90% of amorphous volume fraction.  
     
     
         4 . A method for producing Cu-based amorphous matrix composite materials containing high fusion point element, the method comprising the steps of: 
 (a) fusing high fusion point element(s), Ta or W, in a arc-melting furnace together with matrix element(s), Cu, Zr or Ti, thus producing a binary (matrix element-high fusion point element) master alloy;    (b) arc-melting the binary alloy from the step (a) together with the matrix element(s), Cu, Zr or Ti, thus producing another master alloy with target composition;    (c) melting the master alloy of the step (b) in the atmosphere of Ar in a Quartz tube using a radio-frequency melting furnace; and    (d) injecting the fused metal of the step (c) into a molding die with blowing Ar gas, and solidifying the same.    
     
     
         5 . A method for producing Cu-based amorphous matrix composite materials containing high fusion point element as claimed in  claim 4 , wherein the composition of the master alloy in the step (c) satisfies the following Chemical formula 1;  
       Cu a Zr b Ti c R d    [Chemical formula 1] 
       where R is Ta, W or combination thereof, a, b, c and d are atomic weight ratio, a+b+c+d equals 100, a, b, c, and d have the range of 45≦a≦65, 10≦b≦35, 5≦c≦30, and 5≦d≦10, respectively.