n-SiO_2/Ni电刷镀复合镀层的组织结构和沉积机理  

Microstructure and co-deposition mechanism of n-SiO2/Ni composite coating prepared by electro-brush plating

作　　者：涂伟毅[1] 徐滨士[1] 蒋斌[1] 董世运[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室

出　　处：《材料研究学报》2003年第5期530-536,共7页Chinese Journal of Materials Research

基　　金：国家重点研究发展规划 G1999065009;国家自然科学基金重点50235030;中英政府科技合作基金2002M3

摘　　要：用SEM和TEM分析了n-SiO_2/Ni复合刷镀层的表面形貌和微观组织结构,测定了n-SiO_2在快镍刷镀液中的表面Zeta电位和粒度分布,研究了这些因素对复合沉积过程和对镀层组织的影响。结果表明:刷镀液中n-SiO_2粒径的分布较广,镀层中n-SiO_2粒径在数十纳米范围内;刷镀液中纳米颗粒的粒度越小,刷镀层组织越细小、均匀,结合越致密,而且刷笔运动及溶液对流等因素对进入刷镀层的纳米颗粒粒径有一定选择效应。n-SiO_2/Ni体系复合共沉积的机理属于力学机理。The surface morphology and microstructure of composite coating by electro-brush plating were observed by SEM and TEM. The surface charge and particle diameter distribution of nano-silicon dioxide powder were investigated by measuring its Zeta potential and particle size in quick nickel brush plating solution. The influence factors to the co-deposition process and morphology of composite coating were discussed. The result shows that the nano-particle surface charge is negative and its diameter distribution of nano-particle is wider in brash plating solution. The diameter of nano-particle is in the range of tens of nanometer in coating. Brush movement and solution convection influenced the size of the nano-particles that had entered coating at some degree. According to these results, it is concluded that co-deposition mechanism of nano-silicon dioxide/nickel should be mechanics mechanism.

关 键 词：复合材料 纳米颗粒 复合电刷镀 沉积机理 

分 类 号：TB333[一般工业技术—材料科学与工程] TB383