Patent ID: 7815844
Filing Date: 2010-10-19
Classification: B22F,C04B,C08J,C22C,Y10T

Abstract:
1. A method of making an inorganic coating on an inorganic substrate comprising the steps: a) coating at least one surface of said substrate with an aqueous slurry comprising a gel forming binder and a solid consisting of at least one member of the group consisting of a ceramic powder, a metal powder, a cermet powder, carbon nanontubes, metal whiskers, ceramic whiskers, or their mixture to form a coating on the substrate, said slurry being applied at a temperature above its gelation temperature and having a viscosity less than or equal to 0.4 Pa-sec at the application temperature; b) cooling said slurry to a temperature below its gelation temperature; c) substantially drying the coated substrate; d) heating the coated substrate for periods of times, in atmospheres, and at temperatures below the melting point of said substrate sufficient to sinter the coating and the substrate into a unitary article.