Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Biocompatibility


Effect of Adding Silver Element and Zirconia Ceramic on Corrosion Behavior and Mechanical Properties of Pure Titanium

Wehad A. Al-Rawy; Emad S. Al-Hassani

Engineering and Technology Journal, 2021, Volume 39, Issue 5A, Pages 674-694
DOI: 10.30684/etj.v39i5A.1087

In this research, all the samples are prepared using the powder metallurgy technique by adding silver element and Zirconia ceramic material to the commercially pure titanium at a different weight percent of (10, 20 and 30) to investigate the effect of adding these materials to the CP-Ti on corrosion behavior and mechanical properties. There are two sets of each type of alloys Ti-Ag and Ti ZrO2. The Preparation process was by Weighing, Mixing and Homogenizing Powders by Ball Mill, compacting at 4 tons for 1 min. and Sintering at 700 and 900 °C for 2 hrs. under a controlled atmosphere. The corrosion results showed a good corrosion resistance increases with increasing the silver content as the corrosion rate would be the best in (30% Ag) content with(0.091 mpy) at sintering temperature of 700 °C. And with a sintering temperature of 900 °C, 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 the air with (1.347) mpy at sintering temperature of 700 °C, this results obtained in Ringer’s solution. And microstructures analysis stated that at the silver and the Zirconia content of (10-20 wt%) single phase of  (α- Ti alloy), as the silver and Zirconia content increased to (30% wt), in addition to (α-phase), (Ti2Ag) intermetallic compound developed in the silver alloy microstructure and (TiZr)3O intermetallic compound developed in the microstructure of Ti- Zirconia composites and the hardness test result best hardness of  titanium-silver alloys is with a silver content of (30% Wt) at sintering temperature of 900 C.

Effect of (Ta &Nb) on Corrosion Behavior of Nitinol Alloys

Emad S. Al-Hassani

Engineering and Technology Journal, 2016, Volume 34, Issue 9, Pages 1894-1902

In this research, a study of the effect of Ta and Nb additions on the corrosion behavior and properties of Ni-Ti shape memory alloys prepared by powder metallurgy is presented. It was found that; the transformation temperatures and phase structures of the samples prepared consist of martensitic and austenitic phases at room temperature. Also, Vickers hardness values increased with increasing of Ta and Nb additions. Porosity percentages decreased with increasing of addition of Ta and Nb. Finally, the corrosion rate decreased with increasing of Ta and Nb additions.