Electrochemical Characteristics of HA Film on the Ti Alloy Using Pulsed Laser Deposition

Han-Cheol Choe, Yong-Hoon Jeong, Seung-Pyo Shin, Chae-Heon Chung, Sang-Sub Kim
2010 Korean Journal of Metals and Materials  
In this study, we have investigated the surface morphology of hydroxyapatite (HA) coated Ti alloy surface using pulsed laser plating. The HA (tooth ash) films were grown by pulsed KrF excimer laser, film surfaces were analyzed for topology, chemical composition, crystal structure and electrochemical behavior. The Ti-6Al-4V alloy showed α and β phase, Cp-Ti showed α phase and the HA coated surface showed HA and Ti alloy peaks. The HA coating layer was formed with 1-2 ㎛ droplets and grain-like
more » ... ticles, particles which were smaller than the HA target particle, and the composition of the HA coatings were composed of Ca and P. From the electrochemical test, the pitting potential (1580 mV) of HA coated Ti-6Al-4V alloy was higher than those of Cp-Ti (1060 mV) and HA coated Cp-Ti (1350 mV). The HA coated samples showed a lower current density than non-HA coated samples, whereas, the polarization resistance of HA coated samples showed a high value compared to non-HA coated samples.
doi:10.3365/kjmm.2012.50.5.395 fatcat:vmqfuuqpbnbmtmce6ayxxzjtem