Comparison of Microstructural Evolution of Oxides Formed on F91 Martensitic Steel Upon Breakaway Oxidation at 700 °C in Air and CO2
- 23 Downloads
The microstructure of the oxides formed on F91 steel upon breakaway oxidation in air and CO2 at 700 °C was characterized and compared. It was observed that the Cr-rich corundum layer became humped and disrupted upon breakaway oxidation in air in the first stage. In contrast, spinel was found to form in CO2 without any humping of the Cr-rich layer upon breakaway oxidation. Whether or not the humping and disrupting of the Cr-rich layer were present was related to the form of oxide. Specifically, corundum oxide was facile in air, whereas spinel oxide was facile in CO2.
KeywordsAir Carbon dioxide Oxidation Characterization 9Cr steel
This work was supported by Tsinghua University Initiative Scientific Research Program and the National Magnetic Confinement Fusion Energy Research Project of China [2015GB118001]. Yu Zheng thanks the CSC for the financial support  to visit University of Pittsburgh.