Plasma-etching-resistant granulated yttrium oxide for hot spraying and preparation method thereof
A technology of ion corrosion and yttrium oxide, which is applied in the field of thermal spraying, can solve the problems of uneven plasma corrosion resistance of thermal spraying coatings, uneven thickness of thermal spraying coatings, and influence on powder stability, etc., so as to improve energy utilization rate, Uniform plasma corrosion resistance and stable supply
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Embodiment 1)
[0032] A preparation method of granulated yttrium oxide for plasma corrosion-resistant thermal spraying of the present invention is carried out according to the following steps:
[0033] (1) Mix 10kg of yttrium oxide powder with a purity of ≥99.99% and a particle size of 0.2 μm with deionized water at a weight ratio of 1:2, and stir evenly to prepare a slurry;
[0034] (2) Inject the slurry into the depolymerization machine for depolymerization and reduction, and the depolymerization time is 30 minutes; the D50 of the slurry after depolymerization is 0.4 μm;
[0035] (3) Stir the slurry after depolymerization and reduction, take 80g of malic acid crystals and add 160g of deionized water to fully dissolve it, add it to the slurry, and accelerate the stirring. The pH value of the slurry is 6, and the viscosity is 15mPa·s;
[0036] (4) Pass the slurry through thermal expansion ball making equipment to make yttrium oxide spherical powder;
[0037] (5) The yttrium oxide spherical ...
Embodiment 2)
[0040] A preparation method of granulated yttrium oxide for plasma corrosion-resistant thermal spraying of the present invention is carried out according to the following steps:
[0041] (1) Mix 10kg of yttrium oxide powder with a purity of ≥99.99% and a particle size of 0.07um with absolute ethanol at a weight ratio of 1:2, and stir evenly to prepare a slurry;
[0042] (2) Inject the slurry into the depolymerization machine for depolymerization and reduction, and the depolymerization time is 30 minutes; the D50 of the slurry after depolymerization is 0.1 μm;
[0043] (3) Stir the slurry after depolymerization and reduction, take 100g of a crystal mixture of malic acid, acetic acid, and oxalic acid (4:3:3 by weight) and add 200g of deionized water to fully dissolve it, add it to the slurry, and accelerate Stir, the pH value of the slurry is 6, and the viscosity is 17mPa·s;
[0044] (4) Pass the slurry through thermal expansion ball making equipment to make yttrium oxide spheric...
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