Fiber reinforced high temperature thermal barrier composite ceramic thick coating material as well as preparation and application thereof
A technology of composite ceramics and coating materials, applied in the direction of ceramic layered products, laminated, layered products, etc., can solve the problems of restricting the thickness of ceramic coatings, brittle fracture of coatings, etc., and achieve easy control of process parameters, good insulation The effect of thermal action and simple equipment
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Embodiment 1
[0036] (1) Partially stabilized ZrO with a particle size of 10-100nm 2 / Y 2 o 3 Powder (PYSZ powder, Y 2 o 3 The content is 5~7wt%) 10 kilograms, carry out spray-drying and make agglomerated spherical powder, take the powder between -180~+325 mesh sieve, its particle size range is 40~90 μ m, as the coating material for plasma spraying;
[0037] (2) Use compressed air to spray the hard abrasive (brown corundum) on the surface of the workpiece at high speed to make it rough. A nickel-clad aluminum (Ni / Al) adhesive layer with a thickness of 0.8-1.2 μm is sprayed on the surface of the roughened workpiece. The main technical parameters of the plasma spraying process are: power 35-40KW, voltage 70-80V, current 450-500A.
[0038] (3) On the surface of the bonding layer, plasma spray the above-mentioned powder coating material to prepare a layered spray coating, the coating thickness reaches 0.2-0.5mm, the power used for spraying is 40-45KW, the voltage is 75-85V, and the current...
Embodiment 2
[0042] (1) Partially stabilized ZrO with a particle size of 10-100nm 2 / Y 2 o 3 Powder (PYSZ powder, Y 2 o 3 The content is 5~7wt%) 6.5 kilograms and silicon oxide 1.5 kilograms, particle size is 0.5 kilograms of copper powder ≤30 μm and particle size is 1.5 kilograms of phenolic resin of 10~30 μm, carry out spray drying and make agglomerated spherical powder, take -180~+ The powder between 325 mesh sieves, with a particle size range of 40-90 μm, is used as a coating material for plasma spraying.
[0043] (2) Use compressed air to spray the hard abrasive (brown corundum) on the surface of the workpiece at high speed to make it rough. A nickel-clad aluminum (Ni / Al) adhesive layer with a thickness of 0.8-1.2 μm is sprayed on the surface of the treated workpiece. The main technical parameters of the plasma spraying process are: power 35-40KW, voltage 70-80V, current 450-500A.
[0044] (3) On the surface of the bonding layer, plasma spray the above-mentioned powder coating m...
Embodiment 3
[0048] (1) Partially stabilized ZrO with a particle size of 10-100nm 2 / Y 2 o 3 Powder (PYSZ powder, Y 2 o 3 The content is 5~7wt%) 6.5 kilograms and silicon nitride 1.5 kilograms, particle size is the copper powder 0.5 kilogram of ≤30 μm and particle size is 10~30 μm modified silicone resin 1.5 kilograms, carry out spray drying and make agglomerated spherical powder. The powder between -180 and +325 mesh sieves, with a particle size range of 40 to 90 μm, is used as a coating material for plasma spraying.
[0049] (2) Use compressed air to spray the hard abrasive (brown corundum) on the surface of the workpiece at high speed to make it rough. Spray a layer of NiCoCrAlY adhesive layer with a thickness of 0.8-1.2 μm on the surface of the treated workpiece. The main technical parameters of the plasma spraying process are: power 35-40KW, voltage 70-80V, current 450-500A.
[0050] (3) On the surface of the bonding layer, plasma spray the above-mentioned powder coating materia...
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