This paper presents a development program carried out at the Commissariat à l’Energie Atomique (C.E.A.), whose objective was to successfully bond a dense coating of stainless steel on the internal surface of an aluminum cylinder with a diameter of 300 mm. To achieve these results, a specific nozzle was designed, with calculations and measurements of the particles velocity using DPV 2000. The influence of key parameters on the coating density was investigated. A prototype was successfully produced by optimizing process parameters.