Research of Method about the Application of the Copper Coating Deposition on the Surface Using the High-Speed Plasma Jet

The problem of coupling the heterogeneous materials has always been urgent. There are a lot of ways to solve this problem, but all of them have a number of disadvantages such as high costs, insecurity, etc. The plasma dynamic method is considered as the one of up-to-date solutions. This method allows coupling the heterogeneous materials (for example copper and aluminum, which are the most widely-used material in power engineering), in order to reduce energy losses in the transient contact resistance, by depositing copper on the aluminum contact surface using a coaxial magneto plasma accelerator. In process the accelerator generates a high-speed pulse jet of copper electric erosion plasma, which at high speeds affects the surface of aluminum substrate. A special setup was designed and constructed to determine and calculate the specific transient contact resistance of the obtained contact pairs. The obtained results show the possibility of combining copper and aluminum by depositing a copper coating on aluminum substrate using the plasma dynamic method. The proposed method allows not only coupling copper and aluminum, but also reducing the contact resistance, thereby reducing the energy losses in the transient contacts.