用脉冲电沉积技术制备Ni镀层,研究了脉冲周期和糖精添加剂对其微观结构的影响.结果表明,采用单向脉冲电沉积时,增大脉冲周期可制备出生长取向更均匀、表面更平整且晶粒尺寸更小的纳米晶Ni镀层;在镀液中加入糖精可降低镀层中的张应力,从而避免镀层开裂,且可明显细化镀层的晶粒尺寸;采用正反脉冲电沉积时,随着反向脉冲周期的增大,镀层的晶粒先沿〈200〉方向择优生长,而后转变为沿〈111〉、〈200〉和〈220〉三个方向较均匀生长,最后又重新沿〈200〉方向掸优生长.
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