Plasma diffusion treatment with subsequent coating, known as the duplex process, opens up entirely new fields of application for coatings. The diffused nitrogen results in a consistent hardness increase from the base material to the hard coating. This significantly reduces the risk of rupturing the layers under load (eggshell effect).
The duplex system at Fraunhofer IST supports plasma diffusion treatment with subsequent hard material coating in a continuous process. In addition to the classic hard materials such as TiN, TiB2, TiBN and so on, amorphous carbon layers (DLC) can also be precipitated.