|About this Abstract
||Materials Science & Technology 2011
||Next Generation Biomaterials
||Diode Laser Surface Treated Commercially Pure Titanium: Corrosion and Wear Investigation
||Samar Jyoti Kalita, Joshua L Johnson , Benjamin L. Waldera
|On-Site Speaker (Planned)
||Samar Jyoti Kalita
Commercially pure titanium (cp-Ti) is widely used in dental implants, heat exchangers and reactor vessels because of its superior aqueous corrosion resistance provided by the surface oxide film. Limitations of cp-Ti are low shear strength and low wear resistance. Also, fluoride ions (F<SUP>-</SUP>) destroy the oxide film. Literature reports corrosion of cp-Ti in F<SUP>-</SUP> containing prophylactic agents. This research improved corrosion and wear resistance of cp-Ti through diode laser surface treatments. Corrosion properties were investigated in sodium chloride, sodium fluoride and phosphate buffered saline solutions using electrochemical techniques (corrosion potential, potentiodynamic polarization, polarization resistance and Tafel analysis). Surfaces were characterized using a Hysitron-TI950 NanoIndenter, Taber abrasive wear tester, SEM and confocal microscopy. Polarization resistance (R<SUB>p</SUB>) measurements in NaCl solution demonstrated significant improvement in R<SUB>p</SUB> of cp-Ti (73.5 MΩ∙cm<SUP>2</SUP> after laser treatment vs. 0.44 MΩ∙cm<SUP>2</SUP> in native cp-Ti). Corrosion current after laser treatment was also relatively lower.