Soft magnetic alloy for microwire casting

Abstract

An alloy, which can be used in a microwire, contains 26 to 52 weight % Fe; 26 to 52 weight % Co; 3.0 to 38.0 weight % Ni; at least one selected from the group consisting of 1.0 to 8.0 weight % V, 1.0 to 8.0 weight % Cr, 1.0 to 8.0 weight % Zr, 1.0 to 8.0 weight % Dy and 1.0 to 8.0 weight % Nb; at least one selected from the group consisting of 2.0 to 8.3 weight % Si and 2.0 to 8.3 weight % B; and at least one selected from the group consisting of 0.2 to 1.6 weight % Ce, 0.2 to 1.6 weight % La and 0.2 to 1.6 weight % Y. When cast in a microwire, the alloy can be substantially amorphous.

1 . An alloy, which can be used in a microwire, the alloy comprising 
 26 to 52 weight % Fe;    26. to 52 weight % Co;    3.0 to 38.0 weight % Ni;    at least one selected from the group consisting of 
 1.0 to 8.0 weight % V,  
 1.0 to 8.0 weight % Cr,  
 1.0 to 8.0 weight % Zr,  
 1.0 to 8.0 weight % Dy and  
 1.0 to 8.0 weight % Nb;  
   at least one selected from the group consisting of 
 2.0 to 8.3 weight % Si and  
 2.0 to 8.3 weight % B; and  
   at least one selected from the group consisting of 
 0.2 to 1.6 weight % Ce,  
 0.2 to 1.6 weight % La and  
 0.2 to 1.6 weight % Y, wherein  
   the alloy is substantially amorphous.    
     
     
         2 . The alloy according to  claim 1 , wherein the alloy has a coercivity in a range of 0.5 to 1200 A/m.  
     
     
         3 . The alloy according to  claim 1 , wherein a weight ratio of Fe to Co (Fe/Co) is in a range of from 0.4 to 2.1.  
     
     
         4 . The alloy according to  claim 3 , wherein the weight ratio of Fe to Co (Fe/Co) is about 0.5 or about 1.  
     
     
         5 . The alloy according to  claim 1 , wherein a weight ratio of Si to B (Si/B) is in a range of from about 1 to about 2.  
     
     
         6 . The alloy according to  claim 1 , wherein a weight ratio of Ce:La:Y is about 1:1:1.  
     
     
         7 . The alloy according to  claim 1 , wherein the alloy has a tensile strength in the range of from 1000 to 1600 MPa.  
     
     
         8 . The alloy according to  claim 1 , wherein the alloy is a soft magnetic alloy.  
     
     
         9 . The alloy according to  claim 1 , wherein the alloy is amorphous.  
     
     
         10 . The alloy according to  claim 1 , wherein the substantially amorphous alloy is produced by a process comprising quenching a molten alloy with water.  
     
     
         11 . The alloy according to  claim 1 , wherein the alloy is in the form of a wire and is coated with a glass.  
     
     
         12 . A method of making an alloy, the method comprising 
 melting together Fe, Co, Ni; at least one selected from the group consisting of V, Cr, Zr, Dy and Nb; at least one selected from the group consisting of Si and B; and at least one selected from the group consisting of Ce, La and Y to form a melt,    quenching the melt, and    producing the alloy of  claim 1.