|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials in Clean Power Systems IX: Durability of Materials
||High-Temperature Corrosion of Diffusion Bonded Haynes 230 in Supercritical CO<sub>2</sub> Cycle Conditions
||Omer Dogan, Casey Carney, Gordon R Holcomb, Lucas Teeter, Julie D Tucker
|On-Site Speaker (Planned)
Interest in power generation using supercritical CO<sub>2</sub> (sCO<sub>2</sub>) cycle has increased in recent years. The sCO<sub>2</sub> cycles rely heavily on heat recuperation to achieve higher efficiencies. Microchannel heat exchangers are proposed to reduce equipment size and enhance heat transfer between heat source and sCO<sub>2</sub>. Microchannel architectures are typically formed by a lamination process wherein channels are formed in shims, which are then stacked and diffusion bonded together. Environmental stability of diffusion bonded regions of Haynes 230 stacks was investigated by exposing coupons in a sCO<sub>2</sub> autoclave for 500 hours. The conditions in the autoclave simulated typical temperature (700°C), pressure (25 MPa), and fluid composition (CO<sub>2</sub>) in heat exchangers (primary heater) in indirect sCO<sub>2</sub> power cycles. After the exposure, the surface and cross sections of the coupons were characterized using XRD, SEM, and EDS.
||Planned: A print-only volume