在Guglielmi模型的基础上,推导了采用方形、上三角形、下三角形和锲形四类脉冲波形复合电沉积时,电流与镀层中惰性微粒体积分数的数学关系,并以Ni-SiC复合电沉积为例,进行了试验验证.结果表明,在相同峰值电流密度下,方波脉冲电流下SiC的沉积量是其他三类脉冲电流波形的1.51倍:而当平均电流密度相同时,方波脉冲电流下SiC的沉积量是其他三类电流波形的1.06倍.分析了电流密度对镍基体上SiC沉积量的影响.
The mathematical relationship between the volume fraction of inert particles in deposit and the current applied with rectangular, ramp-up, ramp-down and triangular waveforms in pulsed composite electrodeposition was derived from Guglielmi's model, and then validated taking Ni-SiC composite electrodeposition as an example.The results showed that the amount of SiC deposited with rectangular pulse is 1.51 times that deposited with other three waveforms at the same peak current density, but is 1.06 times that deposited with other three waveforms at the same average current density. The effect of current density on the amount of SiC embedded in Ni matrix was analyzed.
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