Formation of detonation coatings based on titanium aluminide alloys and aluminium titanate ceramic sprayed from mechanically alloyed powders Ti-Al

摘要

The phase formation of the detonation coatings from the different Ti-50Al feed stock powders were investigated. The powders were prepared by milling of TiAl (gamma) ingot and mechanical alloying of the Ti and Al elementary powders. The application of the nanocomposite powder materials which were activated by the mechanical alloying made the phase formation process in the coatings more universal and adjustable due to more active and sensitive response of powder material to a gas environment. It is shown that from the mechanically alloyed powder Ti-50Al, it is possible to consolidate by the detonation spraying method the ceramic coating based on the compound Al2TiO5 at oxidizing influence of the working gas environment on the powder. Coating based on the titanium aluminides with inclusions TiN can be formed at nitriding influence of the working gas environment on the powder. At the use of the cast microsize powder TiAl (gamma), its phase composition is inherited by the coating. (c) 2005 Elsevier B.V All rights reserved.