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STRUCTURAL AND MECHANICAL CHARACTERIZATION OF TITANIUM BIOCOMPATIBLE LAYERS DEPOSITED BY HVOF THERMAL SPRAYING METHOD
Abstract
Titanium is a biocompatible material used in dentistry as una lloyed (minimum purity 99.4%) and alloyed, the most widely used is TiAl6V4 despite some reservations about the releasing of Al and V ions, which can be accumulated in the tissues. To increase the surface contact between the implant and bone, facilitating osseointegration the implants are coated with titanium or ceramic mate rials leading to a ro ughness surface which creates conditions for bone growth, resulting a better anchoring between the implant and bone. The paper presents the experimental results of titanium biocompatible deposition on titanium alloy (Ti6Al4V). The experimental program aimed the structural and mechanical evaluation of the deposited laye rs realized by HVOF thermal spraying process (High Velocity Oxy-Fuel). After the optical and electronic microscopy analysis were not observed defects as microcracks or exfoliation. X-ray diffraction analysis showed that the deposited layer is mainly composed of titanium and oxides resulted from the thermal spraying process. The roughness of the deposited layers has values between 4.54 and 5.23 Ојm, which will provide a proper im plant osseointegration in the human body.
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