Composite and preparation method of joining amorphous alloy material to heterogeneous material

Abstract

A method of joining an amorphous alloy material to a heterogeneous material and a composite formed by the same are provided. The method comprises steps of: placing a pre-formed piece made of one of the amorphous alloy material and the heterogeneous material into a mold; heating the other of the amorphous alloy material and the heterogeneous material to a predetermined temperature, and casting the other of the amorphous alloy material and the heterogeneous material into the mold to form a transition connection part joining the amorphous alloy material to the heterogeneous material and having a fusion welded structure, a microstructure reinforcing connection structure and a composite connection structure; and cooling the amorphous alloy material and the heterogeneous material at a rate higher than a critical cooling rate of the amorphous alloy material to obtain a composite formed by joining the amorphous alloy material to the heterogeneous material by the transition connection part.

What is claimed is: 
     
         1 . A method of joining an amorphous alloy material to a heterogeneous material, comprising steps of:
 placing a first pre-formed piece made of one material selected from the group consisting of the amorphous alloy material and the heterogeneous material into a mold;   heating a second piece made of one material selected from the group consisting of the amorphous alloy material and the heterogeneous material to a predetermined temperature to form a melt, wherein the first pre-formed piece and the second piece are made of different material;   casting the melt into the mold to form a transition connection part, the transition connection part joining the amorphous alloy material to the heterogeneous material and having a fusion welded structure, in which the fusion welded structure is formed by the amorphous alloy material and the heterogeneous material via fusion welding; and   cooling the amorphous alloy material and the heterogeneous material at a rate higher than a critical cooling rate of the amorphous alloy material to obtain a composite formed by the amorphous alloy material to the heterogeneous material joined via the transition connection part,   wherein the pre-formed piece is made of the heterogeneous material, and the amorphous alloy material is heated to a temperature not lower than a glass transition temperature thereof and cast into the mold, in which a casting temperature of the amorphous alloy material is higher than a melting temperature of the heterogeneous material by a predetermined value.   
     
     
         2 . The method according to  claim 1 , wherein the amorphous alloy material is a bulk amorphous alloy material with a critical size larger than about 1 mm and has an elastic limit of about 0.5% or greater. 
     
     
         3 . The method according to  claim 1 , wherein the amorphous alloy material contains crystalline substances or is doped with inorganic substances. 
     
     
         4 . The method according to  claim 1 , wherein the amorphous alloy material is selected from the group consisting of a Fe-based amorphous alloy, a Zr-based amorphous alloy, a Cu-based amorphous alloy, a Ti-based amorphous alloy, and a Ni-based amorphous alloy. 
     
     
         5 . The method according to  claim 1 , wherein the heterogeneous material is selected from the group consisting of a steel, an aluminum alloy, a magnesium alloy, a nickel alloy, a copper alloy, a titanium alloy, a zinc alloy, a plastic material, ceramics, glass, a heterogeneous bulk amorphous alloy, and any combination thereof. 
     
     
         6 . The method according to  claim 1 , wherein the amorphous alloy material is heated to a temperature not lower than a melting temperature thereof. 
     
     
         7 . The method according to  claim 1 , wherein the predetermined temperature is not less than about 15% of the melting temperature of the heterogeneous material. 
     
     
         8 . The method according to  claim 1 , wherein the pre-formed piece is made of the amorphous alloy material, and the heterogeneous material is heated to a temperature not lower than a melting temperature thereof and cast into the mold, in which a casting temperature of the heterogeneous material is higher than a glass transition temperature of the amorphous alloy material by a predetermined value. 
     
     
         9 . The method according to  claim 8 , wherein the casting temperature of the heterogeneous material is higher than a melting temperature of the amorphous alloy material. 
     
     
         10 . The method according to  claim 8 , wherein the predetermined value is not less than about 15% of the glass transition temperature of the amorphous alloy material. 
     
     
         11 . The method according to  claim 1 , wherein the fusion welded structure has a structure selected from the group consisting of an amorphous structure, a crystalline structure, and any combination thereof. 
     
     
         12 . The method according to  claim 1 , wherein the fusion welded structure has a structural feature of gradual transition from an amorphous state to a crystalline state.