Aqueous suspension containing metal carbide particles
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsStanislaus Schwanke, Stephan Müller, Elke Meissner, Boris Epelbaum, Christian Reimann, Jochen Friedrich, Lucas Becker
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Abstract
The present invention relates to aqueous suspensions containing 30 to 95 wt.-% metal carbide particles and a dispersant, and to a process for coating substrates using said aqueous suspensions. The invention also relates to the coated substrates that can be produced by the process according to the invention and to the uses thereof.
Claims19
An aqueous suspension comprising at least one metal carbide particle selected from the group consisting of carbides of hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten, and at least one dispersant, wherein the proportion of the at least one metal carbide particle present is present in the range from 60% to 95% by weight based on the total weight of the suspension, and wherein solvents other than water are present in the aqueous suspension in an amount of up to 2% by weight or no solvents other than water are present in the aqueous suspension.
A process for coating a substrate comprising the following steps:
- i) providing a substrate;
- ii) providing an aqueous suspension comprising at least one metal carbide particle selected from the group consisting of carbides of hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten, and at least one dispersant, wherein the proportion of the at least one metal carbide particle present is present in the range from 60% to 95% by weight based on the total weight of the suspension, and wherein solvents other than water are present in the aqueous suspension in an amount of up to 2% by weight or no solvents other than water are present in the aqueous suspension;
- iii) applying the suspension from step ii) by spraying on to the surface of the substrate from step i);
- and
- iv) drying the applied suspension, resulting in the formation of a coating on the surface of the substrate.
A coated substrate produced by a process for coating a substrate comprising:
- i) providing a substrate;
- ii) providing an aqueous suspension comprising at least one metal carbide particle and at least one dispersant, wherein the proportion of the at least one metal carbide particle is in the range from 60% to 95% by weight based on the total weight of the suspension, wherein the at least one metal carbide is selected from the group consisting of carbides of hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten;
- and wherein solvents other than water are present in the aqueous suspension in an amount of up to 2% by weight or no solvents other than water are present in the aqueous suspension;
- iii) applying by spraying on the suspension from step ii) to a surface of the substrate from step i);
- and
- iv) drying the applied suspension, resulting in the formation of a coating on the surface of the substrate.
Dependencies are inferred from the claim text.