涂布刮刀表面等离子喷涂纳米AI203—13％Ti02涂层的特性

为了深入研究纳米A1203-13％TiO：（ATl3）涂层的组织、性能与喷涂工艺参数之间的关系，采用正交试验法对等离子喷涂工艺的电流、电压、送粉率和喷涂距离等参数进行了优化，在涂布刮刀表面制备了纳米ATl3涂层。采用金相显微镜，SEM，EPMA和XRD等对纳米ATl3涂层的组织、磨粒磨损性能和结合强度进行了分析。结果表...

Performance of Alumina-13%Titania Nanostructured Coating Prepared on Coating Blade Surface by Plasma Spraying

Orthogonal tests were conducted to optimize the parameters including current,voltage,feeding rate of powder and spraying distance for preparing nanometer Al₂O₃- 13%TiO₂ （AT13） composite coating via plasma spraying.Based on the optimization test results,desired nanometer AT13 composite coating was fabricated on the surface of coating blade.A metallographic microscope,a scanning electron microscope,an electron probe micro - analyzer and an X - ray diffractometer were performed to analyze the morphology,microstructure,adhesion to substrate and crystal structure of as - sprayed ceramic composite coating. The abrasive wear resistance of the coating was also evaluated. Results indicate that as - sprayed AT13 coating is uniform and compact and has a low porosity.The coating was dominated by bi-modal distribution of completely melted ingredients and halfmelted ingredients,containing stable a - Al₂O₃ and rutile TiO₂ as the major phases and a small amount of metastableγ-Al₂ O₃ as well.In the meantime,as - sprayed AT13 coating was well mechanically combined with the substrate and dominated by residual compressive stress,showing good abrasive wear resistance.