C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 4/12 (2006.01) C23C 4/04 (2006.01) C23C 4/18 (2006.01) C23C 18/12 (2006.01) C23F 15/00 (2006.01)
Patent
CA 2325218
The method serves for the sealing of porous layers (10) at body surfaces (11), in particular of thermal spray layers of a ceramic coating material. Communicating capillary spaces (12) in the layer (10) have openings at the surface (11). A liquid (2) is used as a sealing medium which consists of a solvent and at least one oxidizable metal which is contained therein. The method comprises the following steps: - a) application (3) of the sealing medium to the body surface and waiting for a penetration of the liquid into the capillary spaces, - b) input of heat (4) for the evaporation of the solvent component and for the oxidation of the metal at a temperature which is greater than a conversion temperature which depends on the oxidizable metal, - c) if required, an at least partial removal (5) of a deposit on the original surface which is formed by solid residues of the sealing medium, and - d) a single or multiple repetition of the application (3, 4, 5) which is defined by the steps a) to c), with the same or with a different sealing medium.
Batawi Emad
Villiger Raoul Patrick
Fetherstonhaugh & Co.
Sulzer Innotec Ag
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