Cold spraying titanium powder is challenging. Contrary to other pure metals such as copper, nickel, and aluminum, titanium coatings are found to be porous even with very high particle velocity obtained by using helium as propelling gas.
In this work, the influence of four parameters on the deposition efficiency, microstructural features, and mechanical properties are systematically investigated in order to optimize cold spray titanium coatings. (1) The influence of particle temperature is studied by comparing the results obtained from two spray guns, namely CGT (Cold Gas Technology-GmbH) Kinetiks 3000 and Kinetiks 4000. (2) The isolated effect of powder sizes is studied using a powder classifier. (3) The effect of oxygen content in the starting powder is investigated by performing a controlled oxidation of the powder. (4) The effect of gun traverse speed is investigated.
For all conditions, the surface temperature is monitored using high speed infrared imaging and the particle velocity is measured using optical diagnostics.
![[ Visit Client Website ]](images/banner.gif)