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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Energy Materials 2017: Materials in Clean Power
Presentation Title Early Stage Oxidation of Alloy 617 in CO2 Power Cycle Environments
Author(s) , John P Baltrus, Casey S Carney, Jinichiro Nakano, Anna Nakano, Gordon R Holcomb, Omer N Dogan
On-Site Speaker (Planned)
Abstract Scope Next-generation power cycles based on supercritical CO2 (sCO2) have gained significant interest due to the potential for improved conversion efficiency and reduced cost. A primary barrier to adoption of this technology is the unknown oxidation/corrosion behavior of alloy materials in sCO2 environments. In this study, we investigated the oxidation/corrosion resistance of a candidate solid-solution strengthened Ni-base superalloy. Alloy 617 coupons were exposed to CO2 at 700 C and 1 bar for times ranging from 5 minutes to 500 hours to gain insight into the early stages of oxidation. Additional coupons were exposed for 500 hours at 700 C and 250 bar to assess the effects of pressure and the supercritical phase. The exposed samples were characterized using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) to evaluate the suitability of this class of alloys for high temperature CO2 power cycle environments.
Proceedings Inclusion? Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)


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