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US 5,672,420 AGranted
High temperature ceramic articles having corrosion resistant coating
AssigneeLockheed Martin Energy Systems, Inc.
InventorsDavid P. Stinton, Woo Y. Lee
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Abstract
A ceramic article which includes a porous body of SiC fibers, Si.sub.3 N.sub.4 fibers, SiC coated fibers or Si.sub.3 N.sub.4 coated fibers, having at least one surface, the article having a coating of AlN adherently disposed throughout at least a portion of the porous body.
Claims6
A ceramic article comprising a porous body comprising at least one of:
- SiC fibers, Si.sub.3 N.sub.4 fibers, SiC coated fibers or Si.sub.3 N.sub.4 coated fibers, said article having a coating of AlN adherently disposed throughout at least a portion of said porous body.
A filter element for removing particulate matter from high temperature fluid streams, which comprises:
- a porous preform base fiber material of selected refractory fibers having a selected average pore size;
- and
- a coating of AlN on each said refractory fibers of said preform of a thickness sufficient to provide corrosion resistance during use of said filter element.
Dependencies are inferred from the claim text.