A simple and effective strategy for WCu functionally graded materials with continuous gradient

Abstract

Functionally graded materials (FGM) have great potential in various applications, but require reliable and efficient manufacturing techniques. This study proposes a preparation strategy for WCu FGM with continuous gradient structure. The W green bodies with a continuously varying W content were prepared by using a self-designed mold to control compression deformation. Subsequently, two types of WCu FGM samples were successfully fabricated through pre-sintering and infiltration processes. The W contents ranged from 64.8 wt% to 81.1 wt% and 75.3 wt% to 90.5 wt% respectively. The microstructure, density, Vickers hardness and electrical conductivity exhibited a continuous trend of change with the variation of W content. This gradient structure control method facilitated the efficient preparation of WCu FGMs with continuously varying compositions. Moreover, it could be extended to achieve the continuous variation of composition and properties in other materials prepared via infiltration techniques.