The Department of Materials Engineering at the University of Technology awarded a doctoral’s degree to Alaa Sabeeh Tayeh,, Department of Materials Engineering/ University of Technology, for his tagged dissertation (Fabrication of Advanced Ceramics Materials for Medical Applications"

Where the discussion took place in the postgraduate hall in Building B in the department on Thursday, 08/09/2022 at nine in the morning, and the discussion committee consisted of:

As well as evaluating the thesis scientifically by Prof. Shehab Ahmed Zeidan/ University of Technology/ Department of Applied Sciences, and Prof. Basma Muhammad Fahd/Al-Mustansiriya University/College of Engineering/Department of Materials Engineering, and linguistically by Prof. Samir Ali Amin/ University of Technology/ Mechanical Engineering Department

Abstract

The advanced ceramic ZTA (biolox) is used in artificial joints. ZTA (biolox) was synthesized and modified by using (0.25, 0.5, 0.75, and 1) wt. % of CaF2 and MgO. The sol-gel technique was utilized to make a nanocomposite powder using aluminum, zirconium, strontium, and chromium salts. The characterization, physical, mechanical, and biological properties were studied. The results show that CaF2 improved the mechanical properties of ZTA except for hardness, which decreased with increasing CaF2 concentration from ~16.84 to 14.50 GPa. However, MgO has two effects on ZTA properties depending on its concentration: below 0.75 wt.%, the effect enhances ZTA properties, but above this concentration, the effect reverses and causes a significant reduction in properties.

The discussion of the dissertation 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.