“…Numerous thermal spray techniques, most notably plasma spraying ( Ref 28,31,32), high-velocity oxy-fuel (HVOF) ( Ref 17,27,28,[33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] and D-gun spraying processes ( Ref 26,29,[48][49][50][51][52][53][54][55][56][57][58][59] are considered for Fe-Al intermetallic coating materials. In comparison with other industrially used coatings such as CVD, PVD and hard chromium plating, a much thicker coating can be obtained by thermal spraying, which is a prerequisite in the energy sector.…”