Electrochemical micro-additive manufacturing method for dynamic control of confined electric field in bipotential tool electrodes

Abstract

The invention provides a confined electric field dynamic adjustment and control electrochemical microadditive manufacturing method. The method is characterized in that in different stages of microstructure deposition growth, the microstructure forming precision and surface quality are improved by adjusting and controlling deposition layer surface current density distribution. The specific application method comprises the steps that a two-potential tool electrode with an auxiliary electrode is adopted, in the growth initial stage, the potential of the auxiliary electrode is set to be lower thatthe potential of a cathode through an electronic load (with the function of automatically adjusting internal resistance and achieving stable voltage drop) to reduce the cathode surface deposition current acting area, and the microstructure initial stage size is controlled; and in the stable growth stage, the potential of the auxiliary electrode is set to be float nearby the potential of an anodethrough the electronic load, the deposition layer surface current density distribution can be finely adjusted, and deposition layer surface flatness is improved.

Description

technical field [0001] The invention relates to an electrochemical micro-additive manufacturing method for dynamic control of a constrained electric field of a bipotential tool electrode, which belongs to the technical field of precision electrodeposition processing. Background technique [0002] Electrochemical micro-additive manufacturing, based on the principle of electrochemical cathode deposition, under the electric field traction and induction, the reduction reaction of cations generates atoms, and the microstructure is formed layer by layer in the order of approximate atomic units. Theoretically, nanometer characteristic size scales can be produced. Arbitrarily shaped microstructure devices. This method avoids the problems of powder particle size limitation, residual stress, thermal damage and other problems in high-energy beam metal additive manufacturing; it has the characteristics of wide range of applicable materials, controllable structure-morphology-performance,...

AI Technical Summary

Problems solved by technology

At present, three-dimensional electrodeposition technology can realize the formation of three-dimensional microstructures, but there is still a certain distance from the application in terms of microstructure size consistency and surface quality.

The specific manifestations are: in the actual electrodeposition process, due to the effect of low current density stray electric field, the actual electrodeposition area is larger than the ideal growth area, and the difference in current density makes the material deposition rate different, the surface is rough, and the flatness is poor.

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