Nickel-cobalt matrix reinforced with silicon oxide nanoparticles nanocomposte coating prepared by direct current electrochemical deposition method
Subject Areas :سیاوش ایمانیان 1 , علی شکوه فر 2 , حامد بخشی 3
1 - کارشناسی ارشد مهندسی مواد، آزمایشگاه تحقیقاتی مواد پیشرفته و نانوتکنولوژی، دانشکده ی علم و مهندسی مواد دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران.
2 - استاد، آزمایشگاه تحقیقاتی مواد پیشرفته و نانوتکنولوژی، دانشکده ی علم و مهندسی مواد دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران.
3 - کارشناسی ارشد مهندسی مواد، آزمایشگاه تحقیقاتی مواد پیشرفته و نانوتکنولوژی، دانشکده ی علم و مهندسی مواد دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران.
Keywords: temperature, Nano-Composite Coating, Electrochemical deposition, surfactant, Micro-Hardness,
Abstract :
Nano-composite coating of Ni-Co/SiO2 is produced by the direct current electrochemical deposition method on the steel substrate. The analyze of X-ray diffraction (XRD) and field emission scanning electron microscope (FE-SEM) are prepared by a nickel-cobalt alloy coatings and Nano-composite coating of Ni-Co / SiO2 that the electrochemical condition were the same in all of them and their grain size and their surface morphology were compared and analyzed. The grain size of Nano-composite coating was less than the alloy coating and surface morphology of the Nano-composite coating was finer and smoother than the alloy coating. The hardness of Nano-composite coating was more than alloy coating. If the electrolyte temperature be 50 degrees Celsius, then the Nano-composite coating of Ni-Co/SiO2 will have the maximum hardness. Adding surfactant to the electrolyte prevents agglomeration of nanoparticles and thus, increases the amount of particles in the coating and the micro-hardness of the Nano-composite coating of Ni-Co/SiO2.The effect of SDS was more than CTAB for the produced coating and the most optimal value for the SDS concentration in the electrolyte was 0.3 grams per liter.
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