Abstract

The atmospheric plasma spraying process and the high velocity oxy-fuel (HVOF) spraying process are used to produce ceramic layers from titanium suboxide powder. Titanium suboxide powder is made from commercially fused and ground powders by reduction with hydrogen. Two powder particle sizes, which were produced for both atmospheric plasma spraying and for the HVOF spraying process, were used in tests. Originally melted and crushed powder fractions served as a reference powder. Furthermore, hardness, wear resistance, and electrical resistance were determined. All titanium oxide layers showed high wear resistance, with HVOF-sprayed layers exhibiting higher wear resistance than the layers produced with the atmospheric plasma spraying process. Atmospheric plasma-sprayed layers, on the other hand, are characterized by higher electrical conductivity. Paper includes a German-language abstract.

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