| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to the field of obtaining materials suitable for formation of high-temperature erosion-resistant protective coatings on especially heat-resistant construction materials (carbon-carbon and carbon-ceramic composite materials, graphites, alloys based on refractory metals), widely used in the aerospace, rocket and other branches of industry. To realise the claimed method first prepared is a multi-component mixture, containing (wt %): Ti - 15.0÷40.0, Mo - 5.0÷30.0, Y - 0.1÷1.5, B - 0.5÷2.5, Cr - 0,2÷6,0, one or several elements of group VIII - 7.0÷10.0, Si - the remaining part, or Ti - 15.0÷40.0, Mo - 5.0÷30.0, Y - 0.1÷1.5, B - 0.5÷2.5, Cr - 0.2÷6.0, one or several elements of group VIII - 7.0÷10.0, Mn - 1.5, Si - the remaining part, or Ti - 15.0÷40.0, Mo - 5.0÷30.0, Y - 0.1÷1.5, B - 0.5÷2.5, Si - the remaining part. The obtained mixture is used to smelt an alloy, which is crushed to powder with a dispersity of 43÷100 mcm, thread-like SiC crystals are introduced in an amount of 2.0÷15.0 wt % with joint dispersion until the most suitable for further coating formation size is achieved. SiC is taken in the form of long-fibre thread-like crystals with a length to diameter ratio L/D?1000.EFFECT: increased erosion resistance of coatings with simultaneous preservation of a self-recovering ability of a protective layer.3 cl, 2 tbl |
