On the Mechanical Properties of Dispersion Strengthened Ni-Al₂O₃ Alloys

Abstract

Powders of nickel and aluminium oxide were mechanically mixed, compacted, sintered, and extruded, to produce Ni-Al₂O₃ alloys. Creep-rupture tests at 800°C on the extruded materials showed that the high-temperature strength of the matrix and its stability were considerably heightened when the Al₂O₃ content was raised above 0.4%. The room-temperature yield strength is related to the measured interparticle spacing of Al₂O₃ in the alloys. Materials in various stage of production process were metallographically studied.