Influence of the Spraying Distance and Jet Temperature on the Porosity and Adhesion of the Ti Depositions, Obtained by Thermal Spraying in Electric Arc - Thermal Activated

摘要

This paper presents an experimental study carried out on the properties of Ti depositions, obtained through thermal spraying in electric arc - thermally activated. The spraying process is a combination between the classical process of thermal spraying and the spraying process in flame. Finite elements analysis of the thermal spraying process in electric arc, allowed the estimated determination of the temperature variations of the jet drive, of the amount of gaseous fuel and also of the optimum spraying distance. The investigations, carried out through the performing electron microscopy analyses (SEM), X-ray diffraction, by determining the porosity and the adhesion of the Ti deposition, allowed the highlight fact that through an optimum choosing of the entrainment jet temperature, are producing dense Ti deposits, characterized by high adhesion (16%). In addition, the deposit porosity -required for integration of the biocompatible materials, can be controlled by the optimal choosing of the spray distance.