Method of protecting products of composite material against oxid

Details Method of protecting products of composite material against oxid Method of protecting products of composite material against oxid

1996-01-08

1997-04-22

Utech, Benjamin

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273977, 4274192, 427421, 4274432, B05D 302

Patent

active

056227515

ABSTRACT:
The method comprises forming a coating on the product of composite material to be protected. The coating contains a mixture of a non-oxide refractory ceramic in finely-divided form, at least one refractory oxide in finely-divided form and providing healing properties by forming a glass, and a binder constituted by a polymer that is a precursor of a non-oxide refractory ceramic. The polymer is transformed into a ceramic to obtain a protective layer comprising a non-oxide refractory ceramic phase and a healing phase which together constitute two interpenetrating lattices. After the ceramic precursor polymer has been transformed, a final heat treatment step may be performed at a temperature higher than the softening or melting temperature of the healing phase.

REFERENCES:
patent: 2972556 (1961-02-01), Vrahiotes
patent: 3807996 (1974-04-01), Saro
patent: 4397901 (1983-08-01), Warren
patent: 4952658 (1990-08-01), Kalchauer et al.

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