Fabrication and Thermal Properties of Polyimide/Cu Functionally Graded Material

Abstract

Thermal conductive composites were formed from thermoplastic polyimide and A1N powders, and functionally graded materials (FGMs) were fabricated from those composites and Cu powder using a spark plasma system. A high pressure of 245 MPa was required to obtain dense composites whose thermal conductivity was more than 10 W/m.K. The thermal conductivity of FGMs prepared at 39.2 and 245 MPa was 35 and 60 W/m.K.