Fabrication of Nano-Al2O3/Ni Composite Particle with Core-Shell Structure by a Modified Electroless Plating Process

Abstract

Ni/Al2O3nanoparticles with core-shell structure were fabricated by a new route for electroless nickel plating. It is found that ultrasonic radiation can promote the plating reaction more efficiently. The Ni-coated Al2O3composite powders with a core-shell structure were synthesized and the thin Ni layer on the a-Al2O3powder was about 5 nm thick. However, during electroless nickel plating without ultrasonic wave treatment, a core-shell structure was also formed, but aggregation of the particles and self-decomposition were observed.