Abstract
The oxidation behaviour at 950°C of a prototype nickel-based single crystal superalloy containing ~15 wt%Cr is studied, with and without silicon alloying. It is demonstrated that the alloy is a marginal alumina former, with further alloying by Si promoting the formation of a continuous, protective alumina scale. Transmission electron microscopy reveals that out-growing alumina forms during the early stages of oxidation. The presence of silicon within the alumina is detected using atom probe tomography.
| Original language | English |
|---|---|
| Pages (from-to) | 272-278 |
| Number of pages | 7 |
| Journal | Materials at High Temperatures |
| Volume | 29 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Aug 2012 |
Keywords
- Heterogeneous nucleation of phase transformations
- Kinetics
- Nickel alloys
- Oxidation
- Superalloy
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry