| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8023826 | Surface and Coatings Technology | 2018 | 32 Pages |
Abstract
In this study, Ti-Al-xNb coatings were deposited on a Ti-6Al-4V alloy by laser surface alloying in order to investigate their oxidation resistance. A Ti-Al coating was fabricated for comparison. It was found that the Ti-Al and Ti-Al-xNb coatings were composed of TiAl and Ti3Al phases. Nb addition reduced the cracking tendency of the Ti-Al-xNb coatings. The Ti-Al and Ti-Al-xNb coatings exhibited good high-temperature oxidation resistance at 800â¯Â°C. In comparison, Ti-Al-xNb (xâ¯=â¯10, 20, 30 and 40) coatings had better high-temperature oxidation resistance and Ti-Al-40Nb coating had the best high-temperature oxidation resistance. The mechanism of Nb that improves the high-temperature oxidation resistance of Ti-Al-xNb coatings includes preventing the internal diffusion of oxygen, inhibiting the formation of TiO2, promoting the formation of Al2O3 and increasing the adhesion of the oxide scales.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Jingjie Dai, Shouying Li, Hongxia Zhang, Huijun Yu, Chuanzhong Chen, Yang Li,