Özet:

Thermal spray coatings are obtained by sending powder particles with high heat and/or kinetic energy onto a target substrate material in molten or semi-molten form. Nowadays, thermal spray coatings are used in many areas such as particularly aviation and defense industry and also energy, electronic and biomedical applications. These coatings, which provide superior properties such as wear, oxidation, corrosion and high mechanical strength on the surfaces applied, can be applied using different spray coating methods according to surface properties demanded. In addition to plasma spray coatings which are commonly used and allow a fast, economical and efficient coating production, High Velocity Oxy-Fuel (HVOF) coatings are also widely used due to the fact that they allow high quality coating production. However, HVOF coatings have a technology with high cost due to equipments and process properties used. In recent years, as alternative to plasma spray and HVOF coatings, Cold Gas Dynamic Spray (CGDS) coatings, which have superior properties, oxide-free and dense coating structure, have came into the forefront. The reason of why this system is called as "Cold Gas Dynamic Spray" is that outlet temperature of the gas present in nozzle is relatively lower than that of other methods. In this study, CGDS coating technology and applications, which is the center of interest for researcher and industrial users, were discussed and explained.

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