Productıon Of Az91 Mg Alloy By Powder Metallurgy Method And Characterızatıon Of Coatıng Wıth Tantalum Oxıde/Hydroxyapatıte By Usıng Sol-Gel Method


Thesis Type: Postgraduate

Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey

Approval Date: 2020

Thesis Language: Turkish

Student: İLHAN DANACI

Supervisor: HANİFİ ÇİNİCİ

Abstract:

As mechanical properties of AZ91 Mg alloy have the closest values to the mechanical properties of bone (cortical bone), it is more important than other metallic materials in its use as an implant. Therefore, AZ91 Mg alloy was produced by powder metallurgy method at different pressures and sintering temperatures. The effects of different sintering temperatures and pressure on the mechanical and structural properties of AZ91 Mg alloy were investigated and the pressure and temperature values giving the optimum properties were determined. In order for the AZ91 Mg alloy to remain in the body for a longer time, the sample surfaces were layered with Ta2O5 / HA. AZ91 Mg alloy powders are produced by applying the method of hot pressing with a uniaxial hydraulic press. The samples produced were cut in dimensions of 60 × 10 × 2 mm3 and their surfaces were sanded up to 1200 grid emery paper. On the prepared base materials, firstly Ta2O5 and then HA was coated on Ta2O5 by sol-gel and dip coating methods. Microstructural properties of samples; It was studied by X-Ray Diffraction (XRD), Energy Dispersion Spectrometer (EDS) and Scanning Electron Microscope (SEM). As a result of the evaluations made, it was found appropriate to produce AZ91 Mg alloy to be produced as a coating base material at a temperature of 400 °C and under 350 MPa pressure. The mechanical incompatibility at the tissue-implant interface was eliminated by using AZ91 Mg alloy