Some problems of plasma-material interactions in fusion devices

The paper concerns some questions connected with the interaction of high-te mperature plasma-ion fluxes with solid materials inside experimental chambe rs used for fusion-oriented research, and particularly inside the Torsatron -type facilities. Mechanisms of the boron carbide erosion are described and discussed. Also described is the behaviour of TiN-coated stainless-steel s urfaces under the irradiation with hydrogen plasma-ion fluxes. In summary, there are described damages in the boron carbide layers and changes in the composition of the TiN-coatings.