A master’s student, Wahad I. Medhat, defended her thesis “Binary Titanium Alloys as Dental Implant Materials” on Saturday, January 12th, at the conference room (C), Department of Materials Engineering, University of Technology. The Committee members included:
|
Name |
Affiliation |
Position in the committee |
|
Prof. Dr. Ali H. Atewi |
University of Technology, Materials Engineering Department |
Chair |
|
Ass. Prof. Dr. Haider H. Jaber |
Babylon University, College of Engineering, Production and Minerals Engineering Department |
Member |
|
Dr. Iyad K. Hassan |
University of Technology, Materials Engineering Department |
Member |
|
Prof. Dr. Imad S. Abdul Karim |
University of Technology, Materials Engineering Department |
Adviser |
The dissertation was scientifically evaluated by Ass. Prof. Dr. Nawal M. Dawood, Babylon University, College of Materials Engineering, and linguistically by Lecturer Yassin M. Taher, University of Technology, English Language Center.
The discussion was conducted in a scientific atmosphere and a master's degree with grade of pass was awarded to the student after the completion of all the corrections that have been decided by the examiners.
Abstract
The element Titanium utilized in dentistry from the past and prescription in implantation. Through those years, not just the pure Ti as well as composites, for example, double and tertiary Ti alloys were utilized. This element and its alloys utilized in different medicinal uses, like, abutment, prostheses, and orthodontic wires. Hip balls can make from titanium, and attachments (being joint substitution) can remain inside the human body for more than 20 years. Thus, because of their high biocompatibility, good mechanical properties, and high corrosion resistance. Cp-Ti, (Ti –(10,20,30) %Ag ), (Ti – (10,20,30) % ZrO2 ) alloys are prepared in this work by powder metallurgy technique .The examinations performed are (X-ray diffraction), scanning electrons microstructure, energy dispersive X-ray spectroscopy, corrosion rate for specimens treated by the (Ringers solution) fluid and hardness. The X-ray diffraction, SEM and microstructure results show that (CP-Ti) samples consist of only pure Ti(α)phase , While the alloys of (Ti-Ag) and (Ti-ZrO2) samples consist of one phase (α- phase) until reaching the (30%wt) of Ag and ZrO2 there would be an intermetallic compound of (Ti2Ag) with titanium –silver alloys and (TiZr)3O intermetallic compound with titanium-zirconia alloys, that with the presence of (α- phase). In the hardness test, there is no significant effect for the (Ti2Ag) intermetallic compound on improving the hardness of the samples and this is attributed to its low percent and the major effect of porosity on the hardness which declined it's effect. The corrosion results showed a good corrosion resistance increases with increasing the silver content as the corrosion rate would be the best at (30%Ag) content with(0.091 mpy) at sintering temperature of 700 C̊. And with a sintering temperature of 900 C̊, the best result was with (30%Ag) with (0.059) mpy. In the Ti-ZrO2 alloys, the best result was with the zirconia content of (30%ZrO2) when cooled in air with (1.347) mpy at sintering temperature of 700 C̊, this results obtained in Ringer’s solution.
