High temperature ceramic articles having corrosion resistant coa

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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210505, 2105101, 4283044, 428367, 428375, 428378, 428408, D04H 158

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active

056724209

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.

REFERENCES:
patent: 5035923 (1991-07-01), Sarin
patent: 5075160 (1991-12-01), Stinton et al.
N. S. Jacobson, "Corrosion of Silicon-Based Ceramics in Combustion Environments", J. Am. Ceram. Soc., 76, 3 (1993).
M. G. Lawson, F. S. Pettit, and J. R. Blachere, "Hot Corrosion of Alumina", J. Mater. Res., 8, 1964 (1993).
J. I. Federer, "High Temperature Corrosion of Heat Exchanger Materials", Proceedings of the Symposium on Corrosion and Corrosive Degradation of Ceramics, pp. 425-443, edited by R. E. Tressler and M. McNallan, published by The American Ceramic Society, Westerville, OH, 1990.
R. L. Jones, "The Development of Hot Corrosion Resistant Zirconia Thermal Barrier Coatings", Proceedings of the 1990 Coatings for Advanced Heat Engines Workshop, pp. II-67-76, Castine, Maine, Aug. 1990.
J. I. Federer, "Evaluation of Ceramic Coatings on Silicon Carbide", Surf. Coat. Tech., 39/40, 71 (1989).
J. R. Price and M. van Roode, "Corrosion Resistant Coatings for Silicon Carbide", Proceedings of the Symposium on Corrosion and Corrosive Degradation of Ceramics, pp. 469-493, edited by R. E. Tressler and M. McNallan, published by The American Ceramic Society, Westerville, OH, 1990.
M. van Roode, J. R. Price, and R. E. Gildersleeve, and C. E. Smeltzer, "Ceramic Coatings for Corrosion Environment", Ceram. Eng. Sci. Proc., 9, 1245 (1988).
K. N. Lee, R. A. Miller, and N. S. Jacobson, "Development of Thermal Shock Resistant Mullite Coatings on Silicon Carbide", Ceramic Transactions, vol. 38, Advances In Ceramic Matrix Composites, pp.565-575, edited by N. P. Bansal, published by The American Ceramic Society, Westerville, OH, 1994.
K. N. Lee and R. A. Miller, "Long-Term Durability of Mullite-Coated Silicon-Based Ceramics", in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials, Cocoa Beach, FL, 1994.
D. Suryanarayana, "Oxidation Kinetics of Aluminum Nitride", J. Am. Ceram. Soc., 73, 1108 (1990).
R. G. Smith, J. H. Eaton, D. D. Johnson, E. A. Richards, "Fabrication of Full Scale Fiber Reinforced Hot Gas Filters By Chemical Vapor Deposition", Proceedings of the Seventh Annual Conference on Fossil Energy Related Materials, pp. 119-127, Oak Ridge, TN, May 11-13, 1993, compiled by N. C. Cole and R. R. Judkins, Report No. ORNL/FMP-93/1, Oak Ridge National Laboratory.
W. Y. Lee, W. J. Lackey, and P. K. Agrawal, "Kinetic and Thermodynamic Analyses of Chemical Vapor Deposition of Aluminum Nitride", J. Am. Ceram. Soc., 74, 1821 (1991).
D. P. Stinton and D. W. Graham, "Chemical Vapor Deposition of Ta.sub.2 O.sub.5 Corrosion Resistant Coatings", Proceedings of the 1992 Coatings for Advanced Heat Engines Workshop, pp. IV-65-77, Monterey, California, Aug. 3-6, 1990.

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