Synthesis, Processing, and Characterization of the Cobalt Alloys with Silicon Addition

The composition of the cobalt alloys contains only noncytotoxic elements (Cr, Si, and Mo) that ensure its biocompatibility, and consequently, the development and proliferation of cells at the implant/tissue interface. The cobalt alloy has an original composition with silicon addition and the proportion of the alloying elements was established so as to ensure a high biocompatibility and adequate physical-chemical characteristics for it to be used in various applications. Silicon is known to be a metal with a high biocompatibility; it can replace noble/non-noble metals in commercial alloys, thereby excluding the occurrence of any toxic corrosion products. We chose it as an alloying element because it confers good casting properties, has double role as hardener and oxidant, ensures an increase in the resistance to tear, and offers a proper fluidity in the liquid phase

Biocompatibility Study of CoCrMoSi k Original Alloy Variants

The study follow the improvement of properties of cobalt base alloys, used in medical applications. This scope targeted the obtaining of alloys with friendly biological interactions to human body. If the original variants of CoCrMoSi k (k = 4, 5, 6, 7) alloys don't subjected to the criteria of biological acceptance from animal body, these don't be placed in live body, indifferent the adequacy of the biomaterials properties. Realization of the original alloy variants must consider and the possibility to appear the base pathophysiological phenomena, with determine or not their safety on long time (generate of thrombosis, inflammation, infection and / or inducing and causing neoplasms)