In this study, nano-sized SiC particles have been codeposited with nickel using an additive free sulfamate bath under pulsed direct current (PDC) and direct current (DC). In order to find the effect of current density, duty cycle (D.C.) and waveform on coating, coatings have been studied in terms of microstructure, microhardness and SiC-codeposition. The scanning electron microscope results shown that the grain microstructure of the coatings have significantly affected by the waveform and D.C. changing the waveform in order of square, sine and ramp and also decreasing the D.C. resulted in finer grain microstructure. The SiC codeposition has shown an optimum value of about 3.3 wt% at the D.C. value of 30%; it also shows a reasonable trend with changes in the waveform. Moreover, according to the microhardness results, the composite coatings with fine grain microstructure have shown a higher microhardness.

中文翻译：

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Ni /纳米-SiC复合涂层的脉冲电沉积：波形，占空比和电流密度的影响

在这项研究中，在脉冲直流电（PDC）和直流电（DC）下，使用无添加剂的氨基磺酸盐浴将纳米尺寸的SiC颗粒与镍共沉积。为了找到电流密度，占空比（DC）和波形对涂层的影响，已经从涂层的微观结构，显微硬度和SiC共沉积角度研究了涂层。扫描电子显微镜结果表明，涂​​层的晶粒微结构受到波形的显着影响，直流电以正方形，正弦波和斜波的顺序改变波形，并且降低直流电可以得到更精细的晶粒微结构。SiC共沉积在DC值为30％时显示出约3.3 wt％的最佳值。随着波形的变化，它也显示出合理的趋势。而且，根据显微硬度结果，