| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Coatings for Structural, Biological, and Electronic Applications
|
| Presentation Title |
Microstructure and Mechanical Properties of Vanadium Oxide-based Coatings on Steel Substrates Prepared by Pulsed Laser Deposition |
| Author(s) |
Andreas Jahja, Paul R Munroe |
| On-Site Speaker (Planned) |
Paul R Munroe |
| Abstract Scope |
A range of vanadium oxide coatings were deposited on a H13 tool steel substrate via pulsed laser deposition as a function of processing conditions. The coatings were subject to detailed microstructural characterization, including cross-sectional TEM studies. It was shown that the pressure of the oxygen reactive gas during deposition was critical to the quality and performance of the coating. That is, more compact and resilient coatings were prepared at lower oxygen concentrations. Further, high oxygen pressures promoted the formation of iron oxide on the substrate prior to deposition. These iron oxide layers promoted delamination of the vanadium oxide. Mechanical behaviour was assessed through nanoindentation using a spherical indenter. The coatings exhibited high hardness values and significant resistance to cracking. Examination of the indented layers revealed intercolumnar cracks within the coatings, together with shear steps at the coating-substrate interface, whilst inclined cracks were observed at the periphery of the indentations. |
| Proceedings Inclusion? |
Planned: Other (describe below) |