Preceramic composition and ceramic product

Details Preceramic composition and ceramic product Preceramic composition and ceramic product

1990-10-15

1993-11-02

Walsh, Donald P.

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

501 96, 501 97, 501 88, 427228, 556402, 556403, 528 8, 528 13, 558296, 10628711, 10628719, 10628723, B32B 900

Patent

active

052582299

ABSTRACT:
Preceramic compositions which have particular utility in providing protective ceramic coatings on normally oxidizable materials, such as carbon/silicon carbide and other carbon-containing composites and other materials, are obtained by dispersing solid particles comprising aluminum nitride particles in an organic solvent solution of an organoborosilazane polymer obtainable by reacting about 0.25-20 parts by weight of a trialkoxy-, triaryloxy-, or tri(arylalkoxy)boroxine with one part by weight of a polysilazane in an organic solvent. Ceramic coatings derived from the dispersions may be overcoated with ceramics derived from other preceramic polysilazane compositions to provide even greater protection to the substrates.

REFERENCES:
patent: 4482669 (1984-11-01), Seyferth et al.
patent: 4921925 (1990-05-01), Niebylski
patent: 4942011 (1990-07-01), Bolt et al.
patent: 5041337 (1991-08-01), Niebylski
patent: 5045339 (1991-09-01), Niebylski
patent: 5073330 (1991-12-01), Nishio et al.

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