Technology of obtaining composite conglomerate powders for plasma spraying of high-temperature protective coatings

OBRABOTKAMETALLOV Vol. 23 No. 1 2021 TECHNOLOGY Ta b l e 1 In fl uence of spray drying and subsequent sintering modes on the particle size distribution of the resulting powders Experiment number Spray mode The fraction 0 ... 100 μ m yield, % Powder yield after sintering (fraction 0..100 μ m), % Durability of powders (10 ... 40 μ m) Ni-22Cr-16Al-1Y against oxidation in air at 1323 K (weight gain for 6 h), mg/g V , ml/kg X , mm P , atm 0..40 μ m 40..63 μ m 63..100 μ m >100 μ m abs enc abs enc abs enc 1 380 + 2 + 1.32 + 92.2 12.8 15.8 48.3 23.1 107.9 2 360 – 2 + 1.32 + 62.2 21.6 9.4 51.8 17.2 39.8 3 380 + 1 – 1.32 + 50.0 8.4 17.2 51.9 22.5 77.4 4 360 – 1 – 1.32 + 68.6 23.5 15.6 45.6 15.3 91.8 5 380 + 2 + 1.08 – 80.2 20.2 20.5 46.6 12.7 48.0 6 360 – 2 + 1.08 – 79.4 23.8 16.6 39.9 19.7 108.0 7 380 + 1 – 1.08 – 35.4 7.9 19.4 55.8 16.9 45.3 8 360 – 1 – 1.08 – 68.0 20.6 15.6 47.0 1.08 68.0