| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 619289 | Wear | 2007 | 7 Pages |
Three Ti–Al series intermetallic compounds, TiAl3, TiAl, and Ti3Al, were utilized to prepare cored wires, which were then used to form coatings on low carbon steel substrates by a supersonic arc spraying process. High temperature erosion (HTE) properties of the coatings were determined in a laboratory elevated temperature erosion tester. The results show that the HTE resistance of the coatings prepared using the cored wires decreased in the order of (from best to worst) TiAl3, TiAl and Ti3Al. The arc-sprayed coatings prepared using cored wire containing TiAl3 and TiAl powders exhibited better or comparable HTE resistance than that containing a commercial Cr3C2-based composite powder, although the hardness of the former two coatings was relatively lower. The laminated structure, which was characteristic of the arc spraying coatings, was found on all the prepared coatings. Oxides resulted from oxidation of both the cored alloy powders and the mild steel sheaths were also identified between the laminated layers. Under the present testing conditions, materials loss of the coatings can be contributed to brittle breaking, fatigue spalling, cutting and ploughing mechanisms.
