I. Introduction
The creation of alternative methods of energy conversion is one of the most promising areas in science and technology. Devices operating on the Seebeck effect - thermoelectric generators (TEG) are alternative energy sources and are used to directly convert thermal energy into electrical energy. For their operation, a wide variety of heat sources can be used, for example, "waste" heat, which is 60% of the generated energy [1], [2]. The most important task in the manufacture of effective thermoelements (TE) is to ensure high-quality contact with thermoelectric materials (TEM), from which thermoelements are made. Contact systems (CS) in thermoelectric devices perform the following functions: carry out ohmic contact with TEM; prevents interdiffusion of materials; ensure the necessary adhesion of the contact layers to the TEM and to each other and provide switching of legs in a thermoelement and sections in multisection thermoelements.