CHEMICAL-VAPOR-DEPOSITION OF TIN ON STAINLESS-STEEL

A study has been conducted regarding the deposition of titanium nitrid e on stainless steel for potential uses in surgical applications. Tita nium nitride was deposited from a gaseous mixture of TiCl4, H-2 and N- 2 using a CVD process at atmospheric pressure and a temperature of 117 3 K employing a horizontal quartz reactor and linear flow velocities i n the range 20 to 60 cm min(-1). Adhesion of the coatings was measured by using the scratch adhesion test and their thickness by using the b all cratering method. The results have shown that at low linear flow v elocities the deposits obtained are thin, inhomogeneous and have a poo r adhesion to the substrate. In contrast, at high velocities (50 cm mi n(-1)) the coatings had better properties and characteristics.