Characterization and Corrosion Behavior of Hydroxyapatite-Coated Titanium Substrates Prepared Through Laser Induced Liquid Deposition Technique

Titanium and titanium alloys are often used in orthopedic surgery and dentistry because of their biocompatibility, mechanical properties, and corrosion resistance. however, their bio- inertness is the most serious drawback for biomedical applications; therefore, in the present study, laser induced liquid deposition (lld) technique was used to deposit bioactive nanocrystalline ha films on titanium substrates at room temperature and various exposure times (20, 30, and 60 min) were examined. the lld method was employed via applying a laser irradiation into a liquid precursor and depositing the ha films on titanium substrates immersed in the liquid precursor. according to x-ray diffraction (xrd) and scanning electron microscopy (sem) results, well crystalline ha coating is prepared and by increasing laser irradiation time, the crystallite size increases from 25 to 41 nm and the morphology changed from rod to mass shape. also, corrosion behaviors of coating were evaluated by potentiodynamic polarization test in simulated body fluid (sbf). results showed that by choosing the appropriate exposure time (60 min), the corrosion resistance of coated substrates improved.