Pure nickel and nano-composite nickel-silicon nitride (Si 3 N 4) coatings were fabricated using pulsed current electrodeposition technique. A control sample for each coating was created and the effect of current density, duty cycle, and pulse frequency on the tribological properties of the electrodeposited coatings was investigated by altering these parameters. X-ray diffraction, scanning electron microscopy and pin-on-disk tests were performed to assess the properties of the fabricated coatings. X-ray diffraction results indicated that both pure and nano-composite coatings possess preferential growth of (111) crystallite planes, which results in the formation of binary symmetrical shaped grains. However, incorporating particles into the coating hindered the growth on other planes, specially (200) growth plane. Incorporation of Si 3 N 4 particles into the coating reduced crystallite size and increased grain refinement; both of which resulted...

中文翻译：

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脉冲电镀镍-纳米Si 3 N 4复合涂层的摩擦学性能评估

使用脉冲电流电沉积技术制备了纯镍和纳米复合镍硅氮化物（Si 3 N 4）涂层。创建每种涂层的对照样品，并通过改变这些参数来研究电流密度，占空比和脉冲频率对电沉积涂层的摩擦学性能的影响。进行了X射线衍射，扫描电子显微镜和针盘测试，以评估所制备涂层的性能。X射线衍射结果表明，纯和纳米复合涂层都具有优先生长（111）微晶面的能力，这导致形成二元对称形状的晶粒。然而，将颗粒掺入涂层中阻碍了在其他平面上的生长，特别是在（200）生长平面上。将Si 3 N 4颗粒掺入涂层中可减少微晶尺寸并提高晶粒细化度；两者都导致...