Metallized coatings on ceramics for high-temperature uses
Patent
·
OSTI ID:6272142
A method is described for coating a ceramic with a thermally stable, metallized coating layer which, in its solid form, is capable of being used over 630 C, comprising: selecting a ceramic metallizing composition having a plurality of mixed powdered metallizing ingredients of differing sizes and suspended in a common fluid suspension medium, said composition when molten causing reactions between the ingredients and also with the ceramic to form the metahized coating layer on the ceramic; preparing the metallizing composition by proportioning the differing sizes of the mixed ingredients so that the final settling velocities of the mixed powders in said medium are nearly the same; coating onto a selected surface of the ceramic a layer of the metaiiizing composition; heating the coated ceramic surface to a first temperature at which the metallizing composition metals to cause said reactions between the ingredients and with the ceramic thereby achieving ceramic metallization; and keeping the composition molten for a sufficiently long time to thereby form on the ceramic by liquid diffusion the thermally stable, metallized coating layer.
- Assignee:
- IMS; EDB-93-114087
- Patent Number(s):
- A; US 5230924
- Application Number:
- PPN: US 7-644421
- OSTI ID:
- 6272142
- Country of Publication:
- United States
- Language:
- English
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