CORROSION BEHAVIOR OF BIOCOMPATIBLE (CP-TI) AND (TI-SI) ALLOYS

Abstract

The porous Titanium is characterized by high permeability which can assure ingrowth of bone tissue, and consequently result in good bonding between metallic implant and bone. In this research, all the samples are prepared using powder metallurgy technique and the preparation process included adding Silicon element to the commercially pure Titanium at different weight percents of (2, 4, 6, 8 and 10) to investigate the effect of adding Silicon element to the commercially pure Titanium on the porosity percentage, microstructure and corrosion behaviour of the resulted samples. Microstructure analysis stated that at (Si) content lower than (2 wt%) the alloy is single phase (α- Ti alloy), as the Silicon content increased, in addition to (α-phase), (Ti5Si3) intermetallic compound developed in the alloy microstructure. Porosity measurement results showed that the porosity percentage increases with the increase in Silicon content. The corrosion results showed improved resistance with increasing the Silicon content in the two testing solutions (Blood Plasma and Ringer’s solutions).