Solid Particle Erosion Performance of Multi-layered Carbide Coatings (WC-SiC-Cr_3C_2)

A modern machine parts such as gas turbine blades and vanes are impacted by high temperature and high speed solid dust particles. As a result may leads to disastrous failure. In order to increase the performance multilayered (WC-SiC-Cr_3C_2) carbide coating was developed on AISI 304 steel using HVOF process. Erosion test as per ASTM G 76 standard were conducted at differently impingement angle (90^0,75^0,60^0,45^0 and 30^0) at room temperature. Micro structural, morphological and element analysis probed using SEM and EDAX. The changes in the resistance to erosion are due to high hardness and less porosity of the developed coating. The analysis showed a well-adhered and dense layer with a uniform distribution and presence of carbides and ability to withstand the erosive effects of solid dust particles.