A Novel Approach to Fabricate W-Cu Functionally Graded Materials via Sedimentation and Infiltration Method

W-Cu composites with continuously gradient distribution of components were successfully prepared by sedimentation and infiltration method. Sedimentation behavior of W particles in the suspension and the influence of PVB content on the distribution of components of W-Cu FGMs was investigated. It is concluded that when the PVB content was 4%, the components were most widely distributed in the W-Cu FGMs, and the distribution of Cu content and W content were 28.03wt%~44.47wt% and 71.97wt%~55.53wt%, respectively. The prepared W-Cu FGMs exhibits high density and thermal conductivities. When PVB content was 4%, the density, thermal conductivity, and electrical conductivity of the W-Cu FGMs are 98.23%, 285 W/(m • K) and 58.3 IACS.