Fabrication of Ti-Al composite coatings by the mechanical alloying method

The method of mechanical alloying (MA) allows one to fabricate sufficiently thick and dense composite coatings using short-time treatments at room temperature. The method is very simple and requires no special atmosphere. It was used to synthesize coatings of Ti-Al, Ti-Al-W-C, and Ti-Al-Si on the titanium surface. During the heating of Ti-Al composite coatings in a temperature range of 600–1000°C, Ti-Al intermetallic phases are formed on the titanium surface. In Ti-Al-Si coatings annealed at 900–1000°C, Ti-Al intermetallic and silicide phases are the basis of the coatings. The temperature ranges of phase and structural transformations in the coatings depend on the initial chemical composition. For the thermal stabilization of Ti-Al intermetallic phases, additions of alloying elements retarding diffusion in the Ti-Al system can be used.

Ҳали таржима қилинмаган