Resumen

PEREZ, Francisco J; LIRA-OLIVARES, Joaquín; HIERRO, María P.  y  TIRADO, Jesús. Estudio de la Factibilidad de formación de Estudio de la Factibilidad de formación de Recubrimientos Protectores por CVD en Lecho Fluidizado Sobre la Aleación de Titanio. Rev. LatinAm. Met. Mat. [online]. 2005, vol.25, n.1-2, pp.53-62. ISSN 0255-6952.

The feasibility of the formation of aluminum protective coatings by chemical vapor deposition in fluidized bed reactor (CVD-FBR) on the titanium alloy Ti-15Mo-Al and the influence of temperature and gas molar relation on the deposition process have been studied.  Before performing the experiments, thermochemical calculations were attained using the free-energy minimization method provided by the HSC Chemistry software, as a designing factor of conditions to deposition of Al on titanium alloy. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), mapping elements and -X-Ray diffraction have been employed to characterize the coatings obtained. For conditions of H₂/HCl=31/1 and H₂/HCl=15/1, both at 395ºC for one hour, the titanium alloy Ti-15Mo-Al exhibits a very thin aluminum layer. The thicknesses of the aluminum layers are 0.58 and 0.87mm for gas relations of H₂/HCl=31/1 and H₂/HCl=15/1 respectively. According to these results, the CVD-FBR is viable for the process of aluminum deposition on y the titanium alloy Ti-15Mo-Al.

Palabras clave : CVD; FBR; aluminum coating; titanium..