This paper investigates the influence of nozzle design on the quality of Al 2 O 3 coatings produced by atmospheric plasma spraying. It compares the thermal and deposition efficiency of different plasma guns along with the porosity and adhesion strength of the resulting coatings. The intent of the study is the application of convergent-divergent nozzles as an economic alternative to the nozzles typically used for atmospheric plasma spraying. Paper text in German.

This paper introduces a new three-cathode plasma burner and explains how it functions in comparison to conventional plasma guns. Paper text in German.

In this paper, Hastelloy C-276 layers are produced using the Axial III plasma spray method and assessed based on oxide content and microhardness. Test results show that Hastelloy coatings with low hardness can be achieved in different atmospheres with appropriate adjustments in process parameters. Paper includes a German-language abstract.

This paper describes a new spraying process that uses a special torch to inject aluminum oxide suspensions into a dc plasma jet. Based on the results obtained, a general mechanism of action is proposed in which factors such as acceleration, impact behavior, and heat transfer phenomena play a role. Paper includes a German-language abstract.

The aim of this study is to achieve, on aluminum alloy substrates, coatings with higher hardness and better dry tribological behavior than that of the substrate. Using atmospheric plasma spraying and a vibratory fluidized bed powder feeder, coatings consisting of a stainless steel matrix with embedded graphite particles were successfully deposited. The dry coefficient of friction of the composite layer is comparable with that of a commonly used stainless steel surface. SEM examinations of polished cross-sections reveal a lamellar structure with randomly distributed graphite inclusions. Paper includes a German-language abstract.