Numerical and Experimental Investigation Gas-Particle Two Phase Flow in Cold Spraying Nanostructured HA/Ti Composite Particle

HA composite coatings added reinforcement phases could improve the mechanical properties and bonding strength of coatings. Cold spraying is a feasible surface technology for preparing In order to investigate influence cold parameters on deposition behavior single HA/Ti particle, numerical experimental investigation gas-particle two-phase flow in nanostructured particle were investigated this study. The results show that different temperatures pressures static pressure was not significant. effects gas temperature tiny under same inlet conditions; however, entire spray gun cavity increased as conditions. There little effect axial velocity cavity; with increase temperature. Meanwhile, gradually increases throughout process. At 573 K 973 K, maximum velocities at 2.2 MPa 778 m/s 942 m/s, respectively. HA/30 wt.% Ti particles condition. decreased size minimum 30 μm 435 467 A certain deformation splats occurred after impacting substrate, adhered Ti6Al4Vsubstrate, clearly presenting flat shape central hump surrounded by ringy band. generated more severe cracks ejecta phenomenon. attached substrate increased.