Effect of Dipping Number on Morphology of Ta2O5 Coatings Made by Sol-Gel Method on AZ91 Mg Alloy


GÜL C., ALBAYRAK S. , ÇİNİCİ H.

JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI, vol.24, no.2, pp.383-389, 2021 (Journal Indexed in ESCI) identifier

  • Publication Type: Article / Article
  • Volume: 24 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.2339/politeknik.683006
  • Title of Journal : JOURNAL OF POLYTECHNIC-POLITEKNIK DERGISI
  • Page Numbers: pp.383-389

Abstract

The study involves the characterization of the Ta2O5 coated AZ91 Magnesium (Mg) alloys produced using the sol-gel method. Mg alloys have a serious potential for use in orthopedic applications due to their lightness and mechanical properties close to the mechanical properties of human bone. However, their corrosion resistance is insufficient for long-term use within the body. Tantalum (Ta), on the other hand, is an element with a high corrosion resistance and does not create a toxic effect on the body thanks to the oxide layer formed on its surface. In this study, it was aimed to cover Ta2O5 in different dipping numbers with the sol-gel method on AZ91 Mg alloys produced by powder metallurgy method and to investigate the effect of this change on the morphology of the coatings. After the samples were coated in different dipping numbers, the change in their morphology was examined using electron microscopy (SEM-EDS) and X-ray diffraction (XRD). As a result of the study, it was observed that the distance between the islets was shortened in the cracked structures encountered in the sol-gel method. With the increasing number of dipping, samples with an average coating thickness of 1, 3 and 7 mu m were produced and a more homogeneous coating structure was created on the surface.