不同种类纳米粒子对低磷化学复合镀Ni-P合金的影响

研究不同种类纳米粒子TiO_2、SiO_2、聚四氟乙烯(PTFE)对低磷化学复合镀Ni-P合金镀层的影响,以硬度、孔隙率、沉积速率、磷含量以及耐蚀性为评价指标。利用HV-1000型显微硬度计测量硬度,电子扫描电镜(SEM)观察镀层形貌,化学方法(磷钼钒黄分光光度法)测镀层磷含量等对镀层性能进行表征,研究不同纳米粒子对镀层性能以及沉积速率的影响。结果表明:不同种类纳米粒子对复合镀层性能的影响不同,其中,TiO_2对镀层的硬度影响最大,最大值是383.2 HV;PTFE对镀层孔隙率影响最低,最低值为0.3个/cm^2;SiO_2对沉积速率影响不大。

Effects of Different Kinds of Nanoparticles on Low Phosphorus Chemical Composite Ni-P Alloys

The effects of different kinds of nanoparticles TiO2,SiO2 and PTFE on low phosphorus chemical composite Ni-P alloy coating were studied,with hardness,porosity,deposition rate and phosphorus content as evaluation indexes. The properties of the coatings were characterized by using HV-1000 type microhardness meter to measure hardness,electron scanning electron microscope(SEM) to observe the coating morphology,chemical method (phosphorus,molybdenum vanadium yellow spectrophotometry)to measure the phosphorus content,and the effects of different nanoparticles on the coating properties and deposition rate were studied. The results showed that the different kinds of nanoparticles had different effects on the properties of composite coatings,among which,titanium dioxide had the greatest influence on the hardness of the coating,the maximum value was 383.2 HV,the porosity of PTFE to the coating was the lowest effect,the lowest value was 0.3 per/cm^2 , and silica had little effect on the deposition rate.