Preparation method of thermal barrier coating with controllable grain morphology
A technology of thermal barrier coating and morphology, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., to achieve the effect of low cost, good development prospect and simple process
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Embodiment 1
[0034] (1) Use YSZ powder with a diameter less than 50nm as raw material, wherein YSZ is 4mol% yttria-stabilized zirconia, add appropriate amount of polyvinyl alcohol and zirconia grinding balls, and mix by wet ball milling for 2 hours to obtain a mixed slurry. The solid content of the mixed slurry was 45%. The mixed slurry was subjected to spray granulation and calcined at 1500° C. for 3 hours to obtain a granulated powder with high fluidity and high sphericity. Sieving the granulated powder to obtain a granulated powder with a diameter of 5-100 microns;
[0035] (2) Use an aluminum plate as the substrate material for coating spraying, and perform sandblasting on the substrate before spraying;
[0036](3) Spraying uses atmospheric plasma spraying equipment, melts the granulated powder obtained in step (1) through an atmospheric plasma spray gun, and sprays it evenly on the substrate. The spraying parameters are: argon 25L / min, hydrogen 12L / Min, With a current of 600A and a ...
Embodiment 2
[0038] (1) Use powders with a diameter of less than 50nm containing 95wt.% of YSZ and 5wt.% of alumina as raw materials, wherein YSZ is 4mol% yttria-stabilized zirconia, add appropriate amount of sodium polyacrylate and zirconia balls, and wet ball mill Mix for 24 hours to obtain a mixed slurry with a solid content of 55%. The mixed slurry was sprayed and granulated, and calcined at 1350° C. for 1 hour to obtain a granulated powder with high fluidity and high sphericity. Sieving the granulated powder to obtain a granulated powder with a diameter of 5-100 microns;
[0039] (2) Use an aluminum plate as the substrate material for coating spraying, and perform sandblasting on the substrate before spraying;
[0040] (3) Spraying uses atmospheric plasma spraying equipment, melts the granulated powder obtained in step (1) through an atmospheric plasma spray gun, and sprays it evenly on the substrate. The spraying parameters are: argon 25L / min, hydrogen 12L / Min, With a current of 55...
Embodiment 3
[0042] (1) Use powders with a diameter of less than 50nm containing 90wt.% of YSZ and 10wt.% of alumina as raw materials, wherein YSZ is 5mol% yttria-stabilized zirconia, add appropriate amount of sodium polyacrylate and zirconia balls, and wet ball mill Mix for 24 hours to obtain a mixed slurry with a solid content of 45%. The mixed slurry was sprayed and granulated, and calcined at 1250° C. for 1 hour to obtain a granulated powder with high fluidity and high sphericity. Sieving the granulated powder to obtain a granulated powder with a diameter of 5-100 microns;
[0043] (2) Use a high-temperature nickel alloy as the substrate material for coating spraying, and perform sandblasting on the substrate before spraying;
[0044] (3) Spraying uses atmospheric plasma spraying equipment, melts the granulated powder obtained in step (1) through an atmospheric plasma spray gun, and sprays it evenly on the substrate. The spraying parameters are: argon 25L / min, hydrogen 12L / Min, With ...
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