| Abstract: | The developments made in synthesizing duplex nanostructure and nanocomposite, gradient, and multi‐layers based on borides are described. The aim of the investigation is to optimize the surface capability by plasma process combinations: duplex process, gradient‐layer, multi‐layer. Within this work different types of duplex hard coatings produced by PACVD were investigated in terms of their tribological behavior and were tested in aluminum die casting applications. Practical tests have been carried out. All coatings tested on die‐casting tools showed a significant increase of lifetime and a reduced metal adhesion tendency. The economic efficiency of coated die casting tools could be proved. |
