METHOD OF MANUFACTURING SILICON NITRIDE-BASED PRODUCTS Russian patent published in 2004 - IPC

FIELD: nitride materials.

SUBSTANCE: invention relates to a method for manufacturing products from chemically bound silicon nitrides for elements and units of motor car, marine, and aircraft engines as well as for surface power plants operated at temperatures up to 1500^оС in combustion product atmosphere and other corrosive media. Method according to invention comprises grinding silicon-containing component and mixing it with nitration accelerator, in particular ferrous oxide or nickel, or nickel oxide, molding blank from resulting mixture, and nitration of the blank at 1000-1500^оС followed by lowering porosity of blank to 0.1 to 15.0% utilizing impregnation of the latter with ethyl silicate followed by heat treatment optionally under nitrogen atmosphere and within silicon nitride and boron nitride charge.

EFFECT: increased nitration rate and increased resistance of material against oxidation, in particular at high temperatures, and also increased strength of material.

9 cl, 4 ex