Solid particle erosion of HVOF sprayed WC-Co/NiCrFeSiB coatings

Erosion wear behaviour of plasma sprayed NiCrSiB/Al2O3 composite coating

“…The addition of 35 wt.% of WC on Ni based alloy have the highest microhardness and better wear resistant properties at elevated temperatures as reported by [3,[10][11][12][13][14][15]. Ramesh et al [16] studied the solid particle erosion wear resistance of WC-Co/NiCrFeSiB coating deposited using HVOF spraying process and observed that the HVOF spraying leads to a high retention of WC in the coating matrix. The average value of microhardness was reported as 1223 HV 0.3 and the main erosion mechanism of the coating was attributed to brittle mode.…”

“…Various hard phases used as reinforcing additives are WC, Al 2 O 3 , Cr 3 C 2 , Cr 2 O 3 , TiC, SiC, TiN, CeO 2 , TiO 2 etc. [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The addition of 35 wt.% of WC on Ni based alloy have the highest microhardness and better wear resistant properties at elevated temperatures as reported by [3,[10][11][12][13][14][15].…”

Optimization and Characterization of High Velocity Oxy-fuel Sprayed Coatings: Techniques, Materials, and Applications

“…HVOF hardmetal coatings containing carbides and/or nitrides, such as WC-CoCr, WC-(W,Cr) 2 C-Ni, and (Ti,Mo)(C,N)-Ni/Co, have very good hardness and tribological properties and hence are suitable for wear protection of machine parts [70]. HVOF sprayed WC-Co/NiCrFeSiB coating with high hardness values and low porosity has been studied for use in coal-fired power plant piping against erosion [71]. Due to brittle nature of the hard metal coating, the applications and conditions must be carefully chosen.…”

Investigation of Hot Corrosion Behaviour of Uncoated and WC-17CO Coated Samples in Aggressive Molten Salt Environment

“…The surface morphologies of the as-sprayed WC-17Co coating showed deposition and uniform distribution of the primary carbide phase. Fractured large carbide has also seen on the substrate under high impinging velocities in HVOF process [12]. Some regions of the binder have seen bright and grey area of different shades as shown in Figure 2.…”

“…Some micro cracks also visible in coated surface. The good content of tungsten (66.65%) on coated surface might lead to improve in mechanical properties [12].…”