Abstract

Refractory borides are suitable for wear protection due to their excellent material properties. In addition to their high hardness, they have excellent corrosion resistance and very good wetting behavior of metals. In addition, the density of many borides, such as titanium diboride, is significantly lower than that of conventionally used toilets. In this paper, the investigations show, that mechanical alloying permits the production of nanostructured titanium diboride composite feedstock for thermal spray application. In order to prevent the formation of undesired secondary borides, a suitable Ni-based alloy is selected for production. A liquid fuel-operated HVOF system is used to prevent the fine microstructure of the composite powders from degrading during thermal spraying. The sprayed layers are characterized in terms of layer morphology and wear behavior and compared with conventional cermets. Paper includes a German-language abstract.

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