Plasma spraying as a coating method has the ability to coat large areas as well as repair the damaged regions in-situ, without removing the whole component from the machine. Boron carbide is a possible layer material for the components of a fusion reactor that are directly exposed to the plasma. The low atomic number and the high melting point are two of the important properties of this material. On the other hand, these properties make thermal spraying difficult. Boron carbide was originally processed using VPS or LVPS syringes. In this paper, water-stabilized plasma spraying is used, which allows the coating of large areas. Boron carbide is coated by varying various parameters, and the properties of the coatings are characterized. The layer composites are then optimized with regard to the requirements of the application. Paper includes a German-language abstract.