REFRACTORY COATING Russian patent published in 2004 - IPC

FIELD: protective coatings.

SUBSTANCE: invention relates to materials for protecting refractory-alloy parts of gas-turbine engines against high-temperature gas corrosion and proposes refractory coating containing SiO₂, B₂O₃, Al₂O₃, BaO, CaO, MgO, TiO₂, Cr₂O₃ and SiO₂-based mineral complex compound composed of, wt %: SiO₂ 56,25-58.05, Al₂O₃ 34.3-35.1, CaO 1.0-1.2, MgO 1.0-1.1, K₂O 2.5-2.6, Na₂O 0.6-0.7, TiO₂ 1.6-1.8, SO₃ 0.15-0.25, and Fe₂O₃ 0.8-1.0 or SiO₂ 32,25-40.05, Al₂O₃ 34.3-35.1, CaO 1.0-1.2, MgO 1.0-1.1, K₂O 2.5-2.6, Na₂O 0.6-0.7, TiO₂ 1.6-1.8, SO₃ 0.15-0.25, Fe₂O₃ 0.8-1.0, and SiB₄ 18.0-21.0, which additionally contains N₂O₃, P₂O₅, polymethyphenylsiloxane, organosilicon resin, and xylene so that coating finally contains, wt %: SiO₂ 20,0-36.0, B₂O₃ 4.0-5.0, Al₂O₃ 5.0-6.0, CaO 2.0-4.0, MgO 0.5-1.5, TiO₂ 1.5-2.5, Cr₂O₃ 15.0-17.0, SiO₂-based mineral complex compound 20.0-36.0, Na₂O 4.0-5.0, P2O5 1.0-2.0, polymethyphenylsiloxane 0.5-0.8, organosilicon resin 11.5-13.2, and xylene 9.0-11.0. Coating is formed at ambient temperatures.

EFFECT: increased temperature resistance and adhesiveness at working temperatures above 1000^оС.

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