Enhanced Creep Resistance via Ion Exchange Processes in Al/Mgal₂O₄ Composites

Abstract

429 5. CREEP AND g -Al 2 O 3 NANOPARTICLES 434 6. CONCLUSIONS 438 7. ACKNOWLEDGEMENTS 439 8. REFERENCES 440 ABSTRACT Discontinuously reinforced aluminium (DRA) composites were prepared by a novel ion exchange process in which the reinforcing phase, aluminium oxide, was introduced by exchanging the magnesium ions in magnesium aluminate spinel with aluminium [1]. The exchange reaction occurs by the diffusion of magnesium and aluminium ions across the interface in opposite directions. The process led to the formation of DRA composites with a remarkable resistance to high