Poly-crystallized hydroxyapatite coating deposited by pulsed laser deposition method at room temperature

We have deposited hydroxyapatite (HAp) films on Ti substrate by pulsed laser deposition using KrF excimer laser. We used HAp targets sintered at temperatures of 500, 700, 900 and 1100 °C with densities between 1.5 and 2.4 mg/mm3. SEM images of the coating surface revealed that the deposited films had spherical structures with diameter of 5 μm. X-ray diffractometry (XRD) analysis showed that the deposited films contained amorphous HAp. Films deposited with a target sintered at 900 °C showed that poly-crystallized HAp coating was achieved at room temperature.