Method for producing metal and ceramic sintered bodies and coatings
First Claim
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1. Method for producing metal and ceramic sintered bodies or coatings comprising:
- (a) nanoscale ceramic or metal powder particles wherein less than 1% of the individual particles have a deviation of more than 40%, and essentially no individual particles have a deviation of more than 60%, from the average grain size, and(b) at least one low molecular-weight organic compound having at least one functional group that reacts and/or interacts with groups present on the surface of the powder particles, the materials (a) and (b) being dispersed in water and/or a polar organic solvent as dispersion medium;
the method comprising the further steps of removing the dispersion medium, forming the surface-modified ceramic or metal powder, before or after the removal of the dispersion medium, to a green body or coating and sintering such green body or coating.
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Abstract
Metal and ceramic sintered bodies and coatings are produced using a combination of:
(a) nanocrystalline metal or ceramic powder wherein less than 1% of the individual particles have a deviation of more than 40%, and no individual particles have a deviation of more than 60%, from the average grain size, and
(b) at least one low molecular-weight organic compound having at least one functional group that can react and/or interact with groups present on the surface of the powder particles, the materials (a) and (b) being dispersed in water and/or a polar organic solvent as dispersion medium.
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Citations
35 Claims
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1. Method for producing metal and ceramic sintered bodies or coatings comprising:
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(a) nanoscale ceramic or metal powder particles wherein less than 1% of the individual particles have a deviation of more than 40%, and essentially no individual particles have a deviation of more than 60%, from the average grain size, and (b) at least one low molecular-weight organic compound having at least one functional group that reacts and/or interacts with groups present on the surface of the powder particles, the materials (a) and (b) being dispersed in water and/or a polar organic solvent as dispersion medium; the method comprising the further steps of removing the dispersion medium, forming the surface-modified ceramic or metal powder, before or after the removal of the dispersion medium, to a green body or coating and sintering such green body or coating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification