【摘 要】
：
Owing to the advantages of even surface,low cost and simple operation,electroless plating is applied to prepare Ni-Co-P/Si3N4 composite coating on a hyper-eutectic Al-Si casting alloy in this paper.Th
【机 构】
：
Department of Applied Physics,Chongqing University,Chongqing,400044
【出 处】
：
第四届国际表面与界面科学与工程学术会议(The Fourth International Conference on S
论文部分内容阅读
Owing to the advantages of even surface,low cost and simple operation,electroless plating is applied to prepare Ni-Co-P/Si3N4 composite coating on a hyper-eutectic Al-Si casting alloy in this paper.The thickness,hardness,surface morphology,composition and wearing resistance of Ni-Co-P/Si3N4 coating have been observed by optical microscope,micro-hardness tester,SEM,EDS and abrasion tester,respectively.The effect of the plating time and temperature,PH and the component in the plating bath on the thickness,hardness and wearing resistance of the formed composite coating were studied,and the influence of the Si3N4 content in the coating on the adhesion performance was also investigated.It is indicated that the thickness of the electroless plated layer increase with the plating temperature and time,PH,and the concentration of NiSO4 and NaH2PO2.The hardness of coating could be enhanced by increasing the plating temperature and time,PH,the concentration of NiSO4,NaH2PO2 and Si3N4,but decreasing the CoSO4 concentration.The results also shows that the adhesion strength of the films could be improved with increasing the Si3N4 content in the composite coatings.Base on these results,the optimal process parameters of composite plating were discussed and suggested.
其他文献
The technique of layer-by-layer (LbL) self-assembly has been used in development of biomimetic materials with superior mechanical and biological properties compared with synthetic composites.Heperin,a
Hard hydrogenated amorphous carbon (so-called diamond-like carbon,DLC) films with superior mechanical properties,wear resistance and biocompatibility have been used on the surface modification of arti
One-step hydrothermal route on the preparation of single-crystalline Fe-doped TiO2 nanowires for a large scale up have been successfully demonstrated for the first time.The nanowires have diameter abo
The impact of the jet flow rate (υ) of electrolyte on the cathode polarization potential (ηc) and the microstructure of deposit has been studied by measuring the cathode polarization curve and observi
The BST films prepared by RF magnetron sputtering were processed in an O2-plasma treatment system.Experiment results indicate that the leakage currents and dielectric loss of the films were effectivel
The arc sprayform process is a new method for the economic,rapid manufacture of forming a shell of several centimeters thickness,in which the molten droplet spray is created by a DC arc between two co
A manganese dioxide (MnO2) coating was electrically deposited on carbon nanotubes (CNTs),prepared by floating-catalyst chemical vapor deposition,from magnesium sulfate (MnSO4) aqueous solution.The mic
Inductively coupled plasma (ICP) system with the adjustable distance (d) between the inductance coil and substrates was designed to effectively utilize the spatial confinement of ICP discharge,and the
TiO2 films were fabricated on Si substrate by using electron-beam gun evaporation.Influence of deposition rate,deposition temperature and ion beam bombarding on stress in TiOh films was studied by AFM