Aluminium oxide dispersion strengthened copper produced by thermochemical process

Abstract

A method for the production of Cu-Al₂O₃ composite powder has been suggested in the present study. Agglomerated Cu based powders with a homogeneous distribution of γ-Al₂O₃ particles of about 25 nm in diameter have been synthesised. The content of alumina in the powders was varied in the range of 0.2-1 6.wt-%. The synthesised powders were hot extruded to full density with an extrusion ratio of 92%. Mechanical properties and electric conductivity of as extruded bodies were measured to investigate the possibility of its application as an electrode. As compared with selected commercial samples, superior electric conductivity and the same mechanical properties have been achieved.