NEAR-ZERO EXPANSION LATTICE METAL BASED ON ADDITIVE MANUFACTURING, AND PREPARATION METHOD AND USE THEREFOR

原文（中国語）

Provided in the present invention are a near-zero expansion lattice metal based on additive manufacturing, and a preparation method and use therefor. The lattice metal has a three-dimensional bimetal lattice structure. The lattice metal is formed by expanding bimetal lattice cells. Each bimetallic lattice cell is of a three-dimensional structure having a truss structure embedded in a hexahedron, and has the capability of expanding in three spacial directions. A transition area is arranged at a connection position of the hexahedron and the truss structure, and the contour of the transition area is not larger than a pore-strut diameter of the cell. The hexahedron is a metal, and the truss structure is another metal. The transition area is a mixture of the two metals, and the ratio of linear expansion coefficients of the two metals is not lower than S. Interfaces of the two metals are metallurgically bonded without gaps.