DEVELOPMENNT OF PLASTICS/CERAMICS COMPOSITE SPRAYED COATINGS FOR HEAT-, CORROSION-AND WEAR-RESISTACE

采用流化床造粒技术，通过改变粘结剂的种类，制备了氧化铝（Al_2O_3）/聚苯硫醚（PPS）复合粉体。采用超音速火焰喷涂系统制备了Al_2O_3 / PPS复合粉末。通过腐蚀试验、磨粒磨损试验和热分析，对复合涂层的组织结构和性能进行了评价，证实了FG工艺制备的复合粉末喷涂层具有较高的耐蚀性和良好的耐磨性。认为聚乙烯醇是一种较合适的涂料，粘结剂的配比影响喷涂层的耐腐蚀性能。

Composite powders of Alumina (Al_2O_3) / Polyphenylene-sulfide (PPS) have been produced by Fluidized-bed granulation (FG) process by varying the binder. Al_2O_3 / PPS composite powders have been sprayed with High Velocity Air Fuel (HVAF) spray system. The microstructures of these composite coatings have been evaluated and the properties of these composite coatings have been investigated by the corrosion test, the abrasive wear test and the thermal analysis.It was confirmed that spray coatings of composite powder produced by FG process had high corrosion-resistance and good wear resistance. It was recognized that polyvinyl alcohol was a suitable oinder and compounding ratio of binder influenced the corrosion-resistant property of sprayed coatings.