Investigation Of Ultrasonic Assisted Zirconia Coated Cp – Ti Alloys For Dental Implantation
Abstract
Deposition of zirconia by ultrasonic waves has been made for pure Titanium alloys produced by utilizing powder technology process in order to minimize the ions of Ti released from implant surface when inserted inside the body. The characterization of samples before and after the surface treatment have been done in order to examine the samples and study the effect of zirconia on Ti surface which involves ; microstructure characterization, Hardness Measurement ; the chemical composition evaluation by (EDS) , and surface roughness by (AFM) . The microstructure observation of the sample showed significant porosity as a result of the manufacturing process-(powder technology). The microstructure observation after ultra-sonic treatment revealed that the sample surface was affected by ultra- sonic energy and heterogeneous surface morphologies were observed with slight decrease in porosity due to the deposition of zirconia. The hardness results showed that the average value of sample increased from (161.5) HV to (179.5) HV after deposition. EDS graph after ultrasonic treatment with zirconia showed the appearance of many elements peaks (Zr,O,C) in addition to Ti peak which indicate that the chemical compositions of surfaces was changed on surface. From AFM measurement ,the surface roughness after zirconia deposition treatment was decrease from (475.43nm) to (272.36) nm. The deposition of ZrO2 make the nano powder fill the surface porosity which leads to reduce surface roughness that creates stable surface and form strong titanium oxide layer which inhabit the ion release.
