n-Al_2O_3/Ni-P复合电刷镀层的组织及摩擦磨损特性

Microstructure,Friction and Wear Characteristics of Brush-Plated n-Al_2O_3/Ni-P Composite Coating

研究了镍磷基纳米Al2O3复合电刷镀层(n–Al2O3/Ni–P)的组织特征及摩擦磨损特性,并与镍磷合金刷镀层进行了比较。结果表明:n–Al2O3/Ni-P复合刷镀层表面粗糙度更小,组织有明显的细化倾向;当镀液中n–Al2O3含量为20g/L时,复合刷镀层的硬度最高,达561HV,是Ni–P镀层硬度的1.3倍,此时复合镀层的耐磨性也最好,磨损失重相比于Ni–P镀层,减少60%以上。

Comparing with nickel-phosphorous alloy coating the microstructure, friction and wear characteristics of brush-plated nickel–phosphorous composite coatings containing nano alumina particles(n-Al2O3/Ni-P) were studied. The results showed that the composite coating has much lower surface roughness and clear tendency of refinement in microstructure. The hardness of composite coating reached maximum, about 1.3 times that of Ni-P coating, when the content of n-Al2O3 was up to 20 g/L. The wear resistance of composite coating with 20 g/L n-Al2O3 particles in brush-plating solution was also excellent, its weight loss was reduced 60 % compared with Ni-P coating.