Abstract
The wear properties of Al2O3bearing coatings, produced by in situ laser Induced thermite reactions fabricated on aluminium alloy 7075, were examined. The thermite reactions were initiated by the laser cladding of mixed powders of CuO-Al, Cr2O3-Al and TiO2-Al. In order to improve the quality of the laser formed coatings, the laser cladding involved two passes of melting. The results of the XRD and XPS analyses showed that in all the three reaction systems, a reaction layer which comprised mainly Al2O3and Al phases was formed. Under dry sliding conditions, the wear resistance, in terms of weight loss, of the laser cladded specimens was considerably higher than that of the uncladded specimens. The predominant wear mechanism of the former specimens was found to be characterised by abrasive, while with the latter specimens, it was the adhesive wear that prevailed.
| Original language | English |
|---|---|
| Pages (from-to) | 142-146 |
| Number of pages | 5 |
| Journal | Surface Engineering |
| Volume | 23 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Mar 2007 |
Keywords
- Aluminium alloy
- Aluminium oxide
- In situ
- Laser cladding
- Thermite reaction
- Wear
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry