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AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsKevin SCHUCK, Christian REIMANN, Michael LANG
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Disclosed is a method for producing coated substrates, wherein a first aqueous suspension and a second aqueous suspension are produced, a layer of the first aqueous suspension is applied onto a substrate, a layer of the second aqueous suspension is applied onto the layer of the first aqueous suspension applied onto the substrate, and the resulting substrate coated is sintered. The first and second aqueous suspensions each contains a refractory metal carbide, a sinter additive and water. Additionally, the second aqueous suspension can contain a sinter additive, wherein the content by weight percentage of the sinter additive in the second aqueous suspension, based on the total weight of the second aqueous suspension, is less than the content by weight percentage of the sinter additive in the first aqueous suspension, based on the total weight of the first aqueous suspension. Also disclosed are a coated substrate produced using the method and the use of the coated substrate.
1-15. (canceled)
A method for preparing coated substrates, in which
A coated substrate, comprising a substrate, at least one first sintered layer arranged on the substrate and comprising at least one refractory metal carbide and at least one sintering additive selected from the group consisting of silicon, hafnium, zirconium, vanadium, tantalum pentoxide, boron carbide, silicon carbide, tungsten carbide, vanadium carbide, molybdenum carbide, boron nitride, tantalum nitride, zirconium nitride, niobium nitride, tantalum diboride, tungsten diboride, zirconium boride, and a refractory metal silicide, and at least one second sintered layer arranged on the at least one first sintered layer and comprising at least one refractory metal carbide and optionally at least one sintering additive selected from the group consisting of silicon, hafnium, zirconium, vanadium, tantalum pentoxide, boron carbide, silicon carbide, tungsten carbide, vanadium carbide, molybdenum carbide, boron nitride, tantalum nitride, zirconium nitride, niobium nitride, tantalum diboride, tungsten diboride, zirconium boride, and a refractory metal silicide, wherein the at least one first sintered layer with a relative density of at least 70%, and the relative density of the at least one second sintered layer is at least 3% lower than the relative density of the at least one first sintered layer.
Dependencies are inferred from the claim text.