Durable hard coating containing silicon nitride
AssigneeEsk Ceramics GmbH & Co. KG
InventorsMartin Engler, Christoph Lesniak, Krishna Uibel
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Abstract
The invention relates to a slip for producing a durable hard coating on a substrate, comprising a) silicon nitride particles and b) a binder comprising nanosize solid particles and/or precursors of nanosize solid particles from production via a sol-gel process. The invention further relates to shaped bodies composed of a substrate with a durable hard coating which has been produced from a slip according to the invention. The shaped bodies of the invention are suitable for use in the field of corrosive nonferrous metal melts.
Claims13
A slip for producing a durable hard coating on a substrate comprising:
- a) a suspension of silicon nitride particles in an amount of 30% by weight to 60% by weight and
- b) a binder comprising a nanocomposite comprising a mixture of nanosize solid particles and/or precursors of nanosize solid particles in an organically modified inorganic polycondensate or a precursor thereof from production via sol-gel process;
- wherein the slip does not comprise a release agent selected from the group consisting of graphite, graphite compounds, sulphides, selenides, tellurides, metal sulphides, metal selenides, metal tellurides, metal-free phthalocyanines, indanthrene dyes, borax, lead oxide, zinc oxide, mica, talc, cadmium chloride, lead iodide, cobalt chloride and silver sulfate.
Dependencies are inferred from the claim text.