Ni-Al2O3 Nanocomposites Electroforming Process under Ultrasonic and Agitation

Wei Ning Lei; Bo Jiang; Wei Qiao Liu; Xing Xing Wang

doi:10.4028/www.scientific.net/AMR.194-196.529

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Ni-Al₂O₃ Nanocomposites Electroforming Process under Ultrasonic and Agitation

Abstract:

Ni-Al₂O₃ nanocomposite coating, which was fabricated by eletrodeposition technique with the aid of ultrasonic and agitation. The effect of ultrasonic and agitation on the characteristics of the deposits was investigated by scanning electron microscopy (SEM) and microhardness tester. The results shows that ultrasonic and agitation result in decreasing of Al₂O₃ nanoparticles aggregation and increasing of Al₂O₃ nanoparticles uniformly dispersed on the matrix of the composite coating. The ultrasonic and agitation improved the Ni crystallization in the Ni-Al₂O₃ nanocomposite electroforming coating. Compared to the process of without ultrasound, the nanocomposite is prepared with ultrasonic and agitation, which has a higher stiffiness by the same current density and electrolyte. The average microhardness of the deposit reaches to 461.9 HV with ultrasonic and agitation, which is double of the conventional electroforming coating.