**4.2.4 Summary**

With the adaption of shroud gas modules to the multieletrode plasma guns Triplex-II and DELTA-Gun it could be proven, that the spraying feedstock being susceptible to chemical reactions can both sprayed in inert atmospheres using argon and reactively sprayed by applying nitrogen as shrouding gas. The inert conditions led to the formation of coatings showing a homogenous microstructure comparable to conventionally APS sprayed metallic coatings. In the case of the use of nitrogen, no dense coatings could be achieved, but the presence of nitride phases in the coatings could be proven. Further on by means of suspension plasma spraying glass was coated with electrically conductive coatings reaching optical grades regarding their transparency. These efforts show that by means of plasma spraying new coating systems can be achieved.
