The Effect of CeO2 Addition on the Microstructure and Properties of Ni-Based Flame-Spray Coatings

: Ni-based alloy with different amount of CeO 2 powders were flame sprayed and melted onto 1045 carbon steel substrate. Microstructure and properties of the coatings were studied by XRD, field emission gun scanning electron microscope (FEGSEM) and SEM analyses. The wear behavior of the coatings was investigated under dry sliding wear conditions, and was compared with that of the coatings without CeO 2 , The results show that the microstructure of the coating with CeO 2 differs widely from the coating without CeO 2 , the novel microstructure is beneficial for wear resistance. Abrasive wear tests without lubricant and analysis of the worn surfaces revealed that the Ni-based alloy coatings with the addition of 0.8% CeO 2 exhibit higher wear resistance.