Mo-Al intermetallic powders produced by SHS for thermal spraying

The recent interest in intermetallic coatings is due to their excellent performance at elevated temperatures and in corrosive environments. Mo-Al alloys are resistant to high-temperature corrosion, especially in sulphur-containing aggressive media. Preparation of Mo-Al base materials is difficult because of big differences in densities and melting points of elemental components (Al-933 K, Mo-2883 K). The aim of this study was to produce Mo-Al intermetallic powders and to use them for the deposition of thermal spray coatings. SHS was used to manufacture these materials. Power morphologies, compositions and structure have been investigated using XRD, SEM and EDX analyses. (author)