|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Advanced Reactive Air Aluminization Process for SOFC Stacks
||Jung Pyung Choi, Jeffry W Stevenson
|On-Site Speaker (Planned)
||Jung Pyung Choi
Chromia-forming ferritic stainless steels are preferred interconnect materials for intermediate temperature SOFCs because of their resistance to oxidation and low cost. However, they produce Cr-containing volatile species at SOFC operating temperatures, which can cause cathode poisoning. Hence, a protective coating is required on the surface of metal interconnect material. Reactive Air Aluminization (RAA) method was developed and used as a protective coating to prevent chrome poisoning in the cathode material and to eliminate or minimize reaction between interconnects and sealing materials. This RAA process is typically performed at 1,000°C to form stable alpha-alumina phase on the stainless steel surface. However, SOFC developers would benefit if the processing temperature can be reduced. In this presentation, we will report the progress towards developing a lower temperature RAA process.