Preparation And Forcasting Properties Of Cu-SiC Nano-composite Coatings

Nano-composite coatings refers to the metal matrix nanocomposite which is formed byembedded the insoluble solid particles(feature dimension is1~100nm) into one or more basemetal. Metal copper as a good conductive, thermal conductivity material is widely used invarious industries. But it has a certain restrictions to the application of the copper when itunder the condition of high temperature, low temperature or reloading. Adding a certainamount of SiC nano-particles in copper plating,not only keep the good electric conductivityand thermal conductivity properties of the copper plating,but also can make the coating hashigh microhardness, excellent wear resistance and high temperature oxidation resistance.In this article Cu-SiC nano-composite coatings were prepared by the compositeelectrodeposition. The first, study on the process parameters for the composite coatings,makecomprehensive analysis to the surface morphology and microstructure of composite coatingsobtained with different mixing methods; study the influence of main process parameters to thefriction and wear properties of coating when the mechanical agitation. The followingconclusions: prepared for Cu-SiC nano-composite coatings with wear-resistant performance,the best preparation process parameters as follows: stirring speed300rpm, cathode-currentdensity4A/dm~2, the concentration of SiC particles in the plating solution4g/L, pH3.5~4.5.The second, ultrasound mechanical stirring was optimized by using orthogonal test toprepared the Cu-SiC nano-composite coatings. Concluded that the optimum processparameters of ultrasound-mechanical agitation-electrodeposition for prepared the Cu-SiCcomposite coatings: ultrasonic power200W,mechanical stirring speed300r/min,theconcentration of SiC particles in the plating solution8g/L,electric current density5A/dm~2.The influence significant of process parameters on amount of Cu-SiC coating wear and tearfrom big to small: ultrasonic power>the concentration of SiC particles>mechanical stirringspeed>electric current density.Finally,predict nanoparticle composite coating in the composite by the AR model,predictand analysis the change tendency,compare the predicted values and the measured values. Theprediced values are parallel to the measured values,the average prediction error of the nanoparticles composite coating in the composite model is2.09%.The AR model has better fittingeffect and high accuracy. It provide a feasible method to determine nanoparticles compositecoating in other kinds of nano composite coating by the AR model.