Abstract

This paper investigates the interaction mechanism of ceramic particles and substrate material. Initially, two ceramic powders (pure aluminum oxide and aluminum oxide with 3% by weight of titanium dioxide) are sprayed by detonation spraying and vacuum plasma spraying onto substrates made of stainless steel, on which an electrolytically deposited and subsequently oxidized nickel layer had been applied. The samples are broken after freezing. Then, the interface between layer and substrate as well as the morphologies of the surfaces are examined by means of scanning electron microscopy and X-ray diffractometry. In all samples, regardless of the spraying process, failure is found within the layer and not at the interface, which indicates a high level of adhesion between the ceramic layer and the oxidized nickel substrate. In the case of detonation spraying, the thickness of the layer remaining on the substrate was greater than that of vacuum plasma spraying. Paper includes a German-language abstract.

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