Effect of TiAl3 Coating Thickness and Morphology, Formed Using the Immersion of Titanium Sheets in Molten Aluminum, on Titanium Oxidation Behavior

• Published in: Metals and materials international 2019, 25(2), , pp.449-455
• Main Author: Khoshhal, Razieh
• Format: Article
• Language: English
• Subjects: Aluminum; Casting; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coating effects; Engineering Thermodynamics; Heat and Mass Transfer; Intermetallic compounds; Machines; Magnetic Materials; Magnetism; Manufacturing; Materials Science; Metallic Materials; Morphology; Oxidation; Processes; Protective coatings; Solid Mechanics; Submerging; Substrates; Titanium aluminides; 재료공학
• ISSN: 1598-9623; 2005-4149
• DOI: 10.1007/s12540-018-0183-7

In this research, TiAl 3 layers with different thicknesses were deposited on a titanium sheet by immersion of titanium in molten aluminum for different times. The oxidation behavior of the coated titanium at 850 °C was investigated and the comparison of the results was made with the oxidation behavior of the uncoated titanium sheet. The results showed that the produced TiAl 3 layer could protect the titanium substrate against the oxidation if it contains an appropriate quality and morphology, otherwise not only it cannot withstand the oxidation, but also it accelerates the oxidation process of the titanium substrate. The protection mechanisms of the layers were probed into, performing the XRD analysis. It was found that the TiAl 3 layer morphology affects oxidation mechanism and oxidation products.