METHOD OF PROTECTIVE COATING MANUFACTURING Russian patent published in 2017 - IPC C04B35/58 

FIELD: metallurgy.

SUBSTANCE: method involves charge preparation by mixing source components containing silicon, boron and zirconium boride at the following ratio, wt %: Si 65-75, ZrB₂ 10-30, B 10-30, slurry preparation and application on a substrate, and further heat processing of the obtained workpiece in air medium, where slurry is prepared using an organic binder in the form of acetone solution of silicic acid in amount of 5-10 wt % added to 100 % of the charge weight on dry basis of silicon dioxide, then the slurry layer is applied onto a substrate out of heat-resistant nonmetal material, the workpiece obtained is dried at 40-80 °C, and the slurry is applied onto the object to be protected layerwise until a protective coating of required thickness is formed, followed by final burning in silicon carbide furnace at 550-600 °C.

EFFECT: reduced temperature of protective coating formation.

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