Preparation process of densely-arranged columnar crystal ceramic coating based on laser remelting technology
A technology of laser remelting and ceramic coating, which is applied in the coating process and coating of metal materials, can solve the problems of corrosion deterioration, low bonding force, and reduced working reliability, so as to reduce thermal stress and increase temperature quickly , the effect of increasing the nucleation rate
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[0019] The present invention will be further described in detail below with reference to the drawings and embodiments.
[0020] A ceramic coating with close-packed columnar crystal structure 7 is prepared by laser remelting on workpiece 1 with thermal barrier coating nickel-based superalloy. The material of workpiece 1 is nickel-based superalloy, the model is Inconel718, and the size is 50mm×100mm. ×2mm, the surface of the workpiece 1 is coated with a thermal barrier coating. The thermal barrier coating includes a bonding layer 2 and a ceramic layer 3. The thickness of the bonding layer 2 is about 0.1mm, and the thickness of the ceramic layer 3 is about 0.3mm. 2 The material is NiCoCrAlY, the ceramic layer 3 is 6%-8% Y 2 O 3 ZrO 2 .
[0021] Reference figure 1 with figure 2 , A preparation process of close-packed columnar crystal ceramic coating based on laser remelting technology, including the following steps:
[0022] 1) Fix the nickel-based superalloy workpiece 1 with thermal b...
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