High temperature oxidation and oxychlorination behaviors of cold sprayed Inconel 718 deposits at 700 °C

The current research represents the first systematic study on high temperature oxidation and oxychlorination behaviors of cold sprayed Inconel 718. Tests were carried out at 700 ℃ and cold sprayed Inconel 718 was shown to possess excellent oxidation resistance comparable to that of the bulk Inconel 718. In the oxychlorination condition, a single-layer structure was observed in the scale of cold sprayed Inconel 718 in contrast to the double-layer scale in the bulk Inconel 718. Superior oxychlorination resistance of cold sprayed Inconel 718 was revealed and attributed to the much smaller grain size and higher dislocation density.