| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
General Abstracts: Structural Materials Division
|
| Presentation Title |
Role of TM (TM = Pd, Rh, Ir) on stability and oxidation behavior of ternary β-NiAl |
| Author(s) |
Travis Michael Brammer, Pratik Kumar Ray, Yi Ying Ye, Matthew J Kramer, Mufit Akinc |
| On-Site Speaker (Planned) |
Travis Michael Brammer |
| Abstract Scope |
The drive for greater efficiencies and clean power generation requires the modern day gas turbines to operate at as high a temperature as possible in harsh operating conditions. Controlling oxidation at these elevated temperatures is a prime concern for system lifetime. In our work, we focus on the β-NiAl. Choice of alloying additions for the current work was made using a multi-stage ‘sieving process’ to reduce the large number of potential alloying elements. Initial filtering of the prospective elements was done using extended Miedema model. Promising elements were studied within the framework of DFT using VASP to check the role of minor additions on stability. Pd, Rh and Ir were deemed the most suitable for experimental testing. Additionally, the oxidation behavior of NiAl has been analyzed as functions of composition and temperature. The alloys were tested at isothermal temperatures ranging from 1100°C-1300°C, and thermal cycling at 1150°C. |
| Proceedings Inclusion? |
Definite: A CD-only volume |