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

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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.