|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Coal-Based Power
||Towards Predicting Reactive-element Tolerances in the Compositional Design of Al2O3-scale Forming Alloys and Coatings
||B. C. Zhou, A Ross, T. Gheno, X. L. Liu, G. Lindwall, B. Gleeson, Zi-Kui Liu
|On-Site Speaker (Planned)
Al2O3-scale forming alloys and coatings are used extensively for high-temperature applications, including turbine engines. A common method used to improve the oxidation resistance of such systems is to add small amounts of reactive elements, typically Hf, Y, or Zr. However, when too much reactive element is added the beneficial effects are lost and oxidation resistance is severely reduced. In this presentation, our computational and experimental activities are reviewed, i.e. first-principles calculations, CALPHAD modeling, and oxidation experiments of the Ni-Al-Cr-Hf-Y system. The composition and temperature spaces for optimal oxidation resistance are explored computationally for the Hf and Y tolerance without formation of their oxides and intermetallic phases and compared with our new experimental data showing reasonable agreement.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)