Experimental observation of effect of substrate shape in Suspension Plasma Spraying

Suspension plasma spraying has shown its capacity to deposit finely structured coating with various microstructures including the columnar microstructures that are generally searched for the topcoat of barrier thermal coatings in gas turbines. However, some challenges are still to be taken up before the application of the technology at in industrial scale. One deals with the deposition of a uniform and reliable coating on a complex shape substrate. Some numerical studies have broached this topic but further studies are still required to better understand and master it.

This work deals with an experimental observation of the fine particle stream close to the substrate. The effect of the particle size, substrate location and shape will be investigated.