Self Formed Cu‐W Functionally Graded Material Produced Via Powder Segregation

Abstract

Copper – tungsten functionally graded material has been produced by Cu infiltration of a tungsten graded preform which is self formed through segregation effect in a weakly excited bimodal W granular media. Electrical and elastic properties of the final materials are strongly influenced by W microstructural evolution obtained during vibration. The optimal microstructure for electrical properties consists of a highly 3-D interconnected Cu phase (skeleton type of microstructure), while the graded structure has the highest E-modulus.