Preparation And Properties Of Titanium Dioxide-Nickel-Graphene Composites

In production,equipment and tools play a pivotal role,and their damage will have a huge impact on the economy,resources and the environment.The main reasons for equipment and tool damage are wear and corrosion,and it is difficult for mechanical tools produced by a single material to work in harsh environments for a long time.Titanium and graphene have attracted extensive attention because of their advantages in enhancing the hardness,wear resistance and corrosion resistance of materials,and have gradually become hot research materials.In this paper,the electroforming process was used to improve the properties of nickel-based composites by regulating the content of titanium and graphene.The main research contents are as follows:1.The optimal electroforming process parameters were determined by COMSOL Multiphysics software simulation.The research shows that the process parameters have a great influence on the electroforming process rate and the uniformity of electroforming parts.The optimal process parameters are: the current density is 1200A/m2,the pH value is 4.0,the temperature is 40℃,time24 h,stirring speed 300r/min.2.The titanium dioxide-nickel composite material and the titanium dioxide-nickel-graphene composite material were prepared by the dispersion composite electroforming process,and the performance of the composite material was regulated by controlling the ratio of titanium dioxide and graphene.The surface morphology of the material was characterized by scanning electron microscope(SEM),the elemental composition and composition of the material were characterized by X-ray photoelectron spectroscopy(XPS),and the grain size of the material was characterized by X-ray diffractometer(XRD).The microhardness,wear resistance and corrosion resistance of the prepared composites were tested by microhardness tester,friction and wear testing machine and electrochemical workstation,respectively.Ti/Ni composites and G-Ti/Ni composites were successfully prepared in this subject,and it was confirmed that Ti/Ni composites with 22g/L TiO2 had the best improvement in hardness,and the hardness was 111.89% higher than that of pure nickel;The G-Ti/Ni composites with 22g/L titanium dioxide and0.2g/L graphene added are the best for the improvement of wear resistance and corrosion resistance.The friction coefficient and corrosion current density are11.76% and 48.68% lower than those of the Ti/Ni composite without graphene addition,respectively.Titanium dioxide can be added to replace expensive graphene in some occasions where wear resistance and corrosion resistance are not required.