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Synthesis and characterization of particle-reinforced Ni/Al2O3 nanocomposites

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Abstract

Nanocomposite Ni/Al2O3 films were electrodeposited from a suspension of Al2O3 nanoparticles in aqueous nickel sulfamate solution. The volume fraction of particles incorporated increased with electrode rotation rate and decreased with deposition current density. The composition, microstructure, hardness, and magnetic properties of these nanocomposite films were characterized. The mechanical strengthening due to particle dispersion in the films was interpreted by considering an Orowan dislocation bowing mechanism. The coercivity of the films increased with increasing particle concentration in the film. The saturation magnetization showed a weak dependence on particle concentration.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Johns Hopkins University, 21218, Baltimore, Maryland, USA

    I. Shao & P. M. Vereecken

  2. Department of Physics and Astronomy, Johns Hopkins University, 21218, Baltimore, Maryland, USA

    C. L. Chien

  3. Department of Materials Science and Engineering, Johns Hopkins University, 21218, Baltimore, USA

    P. C. Searson & R. C. Cammarata

Authors
  1. I. Shao
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  2. P. M. Vereecken
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  3. C. L. Chien
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  4. P. C. Searson
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  5. R. C. Cammarata
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Shao, I., Vereecken, P.M., Chien, C.L. et al. Synthesis and characterization of particle-reinforced Ni/Al2O3 nanocomposites. Journal of Materials Research 17, 1412–1418 (2002). https://doi.org/10.1557/JMR.2002.0210

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  • DOI: https://doi.org/10.1557/JMR.2002.0210

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