Coatings with second phase particulate to improve environmental

Details Coatings with second phase particulate to improve environmental Coatings with second phase particulate to improve environmental

1994-01-31

1996-09-10

Utech, Benjamin

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428634, 427199, 4273762, 4274191, 4274197, C03C 2702

Patent

active

055543901

ABSTRACT:
A fine, hard particulate is distributed within a fused coating on a substrate. The distributed, fine, hard particulate function as crack arresters, so that a propagating crack is actually stopped upon encounter with the hard particle, and enhance nucleation during the coating formation, so that finer grain size is achieved within the coating, which in effect decreases the crack length in the coating.

REFERENCES:
patent: 2929741 (1960-03-01), Steinberg
patent: 3619430 (1971-11-01), Hiratsuko et al.
patent: 4092459 (1978-05-01), Deffeyes et al.
patent: 4535035 (1985-08-01), Smialek et al.
H. S. Hu, A. Joshi, & J. S. Lee "Microstructural evaluations of a Si-Hf-Cr fused slurry coating on graphite for oxidation protection"--May/Jun. 1991--pp. 1535-1538--J. Vac. Sci. Technology.
Charles Packer & Roger A. Perkins "Development of a Fused Slurry Silicide coating for the protection of tantalum alloys"--pp. 361-378--Journal of the Less-Common Metals (1974).
James L. Smialek "Processing of Fused Silicide Coatings for Carbon-Based Materials"--pp. 757-783--Ceramic Engineering and Science Proceedings, vol. 4, No. 9-10, Sep.-Oct. 1983.

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