Abstract

This paper presents the metallurgical concept as well as the results for composite powder production and thermal spraying of silicon carbide (SiC) cermets. In addition to the layer characterization with regard to the SiC content and the porosity, the wear and corrosion behavior of the SiC coatings are investigated and the application potential for SiC cerments is shown. The main area of application of the high velocity oxygen fuel process is the production of wear and corrosion protection layers on the basis of cermet materials. Various investigations were carried out to apply SiC containing composites for thermal spraying. The innovative concept for the production of SiC composites shows, that adapted alloys, with a matrix alloy composition outside the primary crystallization limiting eutectic, enables the wetting of the SiC particles by reduced reactivity. Paper includes a German-language abstract.

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