METHOD OF PROTECTION COATING MANUFACTURING AND CHARGE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC C04B35/58 

FIELD: metallurgy.

SUBSTANCE: method of protective coating obtainment involves charge preparation by mixing source components containing silicon and zirconium boride at the following ratio, slurry preparation and application on a substrate and further heat treatment of obtained workpiece in air, where boron carbide is added to the charge during preparation at the following component ratio, wt %: Si 65-75, ZrB₂ 10-30, B₄C 10-30, slurry is prepared with organic binder in the form of acetone solution of silicic acid in amount of 5-10 wt % above 100 % of the charge weight on dry basis of silicon dioxide, then a slurry layer is applied onto a substrate out of heat-resistant non-metal material, obtained workpiece is dried at 40-80 °C, and slurry is applied layerwise on the surface of the object to be protected to form protection coating layer of required thickness, followed by final burning in silicon carbide furnace at 500-550 °C.

EFFECT: reduced temperature of protection layer formation.

2 cl, 2 tbl