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

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 one of a fusion welded structure, a microstructure reinforcing connection structure and a composite connection structure, in which the fusion welded structure is formed by the amorphous alloy material and the heterogeneous material via fusion welding, the microstructure reinforcing connection structure is formed by a microstructure on a surface of the pre-formed piece and the other of the amorphous alloy material and the heterogeneous material, and the composite connection structure comprises the fusion welded structure and the microstructure reinforcing 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 the amorphous alloy material to the heterogeneous material joined via the transition connection part,
• wherein the first 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 in a first region of the mold is lower than a melting temperature of the heterogeneous material, and a casting temperature of the amorphous alloy material in a second region of the mold is higher than the melting temperature of the heterogeneous material by a predetermined value.