Study on NiCr-Cr3C2 Deposition Efficiency of Two Supersonic Spraying

NiCr-Cr3C2 coatings were made by High-efficiency Ultrasonic PlazJet (HEPJet) and JP-5000 Supersonic Flame Spraying (JP5000). The instruments of SEM and EDS were used to analyze the composition and structure of NiCr-Cr3C2 coatings and spraying particles. The results show that the oxidization of coatings is more serious for JP-5000 than HEPJet. The deposition efficiency of HEPJet NiCr-Cr3C2 coatings is 54%, which is 1.5 times as higher as JP-5000’. And the oxidation of spraying particle in the flame is the main reason that caused low deposition efficiency of NiCr-Cr3C2 coatings by JP-5000 spraying.