复合镀机理研究

IMR OpenIR

	复合镀机理研究
	丁玲
学位类型	硕士
导师	姜晓霞
	1988
学位授予单位	中国科学院金属研究所
学位授予地点	中国科学院金属研究所
摘要	通过改变搅拌强度的方法研究了搅拌时酸性镀铜－Al_2O_3体系复合镀层形成的影响；另外还通过电流效率、电极电位、极化曲线和微分电容等电化学参数的测定，并结合比色法、原子吸收光谱定Ni~(2+)、Cu~(2+)浓度，色谱法测定H含量等手段研究了Al_2O_3、SiC微粒对 Ni~(2+), Cu~(2+), H~+和表面活性剂的吸附，以及吸附对 Cu-Al_2O_3, Ni-SiC, Ni-P-SiC复合镀层形成的影响，结果表明：在合适的搅拌条件下，也可以从酸性镀铜－Al_2O_3体系得到 Cu-Al_2O_3复合镀层。（而一般文献认为不可能形成复合镀层）；微粒对Ni~(2+), Cu~(2+)，H~+，阳离子表面活性剂的吸附改善了微粒的荷电性，从而增加了微粒在阴极表面的静电吸附，有助于提高镀层中粒子的嵌合量。实验还发现化学镀嵌合能力远大于电镀，有理由认为在化学镀自催化过程形成的表面上，存在许多的活性中心，这些活性中心对粒子产生化学吸附，从而有助于镀层粒子含量的提高。实验结果表明了形成复合镀层的关键是适当的搅拌方式和强度。
其他摘要	The effect of stirring on the formation of electrodeposited composite coating (Cu/Al_2O_3 -- in acidic plating bath) has been studied. The adsorption of Ni~(2+), Cu~(2+), H~+ and surfactants by the particles of Al_2O_3, SiC, as well as the effect of adsorption on the formation of Cu/Al_2O_3, Ni/SiC and Ni-P/SiC coating have also been investigated by measuring of electrochemical parameters (potentials, polarization curves, current efficiency and differential capacity etc.) and concentration of Ni~(2+), Cu~(2+), H~+. The results show that composite coating can be obtained under the appropriate agitation. The adsorption of cation by the particles, which increase the positive charge carried by the particles, intensifies electrostatic forces on the cathode surface. So it's benifical to the increase of the particles content in the coating. It has been found that the composite ability of particles of the electroless plating is much higher than that of the electroplating. It can be suggested that there are active centres on the coating surface, they will chemically adsorb the particles and increase the content of particles in the coating. The results indicate that the role of stirring is the key factor to form the composite coating.
页数	70
语种	中文
文献类型	学位论文
条目标识符	http://ir.imr.ac.cn/handle/321006/17338
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	丁玲. 复合镀机理研究[D]. 中国科学院金属研究所. 中国科学院金属研究所,1988.