Oxidation of an electrodeposited Ni–Y2O3 composite film

• DOI: 10.1016/j.corsci.2012.06.019
• Publication Date: 2012-06-25T07:37:37Z
• Authors: Y.B. Zhou; J.F. Sun; S.C. Wang; H.J. Zhang
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract A Ni–9.5 wt.% Y 2 O 3 composite film has been developed by codeposition of Ni and Y 2 O 3 microparticles with an average particle size of 2.5 m onto pure Ni surfaces from a nickel sulfate. The Y 2 O 3 microparticles were dispersed in the electrodeposited nanocrystalline Ni grains. The isothermal oxidation at 800 °C for 30 h and 1050 °C for 20 h in air showed that the as-deposited Ni–Y 2 O 3 composite film has a superior oxidation resistance compared to the electrodeposited pure Ni film because the codeposited Y 2 O 3 particles block the outward diffusion of nickel and change the oxidation growth mechanism of Ni.