Corrosion of 9Cr Oxide Dispersion Strengthened Steel in Supercritical Water Environment

摘要

As a candidate structural material for advancednuclear energy systems, ferritic-martensitic steels providegood swelling resistance and thermal conductivity.However, their application is limited to temperatures ofup to ～600°C due to the loss of creep strength at highertemperatures. Oxide dispersion strengthened (ODS)steels produced by mechanically alloying with Y2O3dispersion particles, such as the 9Cr ODS steel have beenshown to have higher creep strength compared to ferriticmartensitic steels of similar compositions, but without thedispersed oxide phase. However, the oxidationbehavior of 9Cr ODS steels in high temperatureenvironments such as supercritical water requiresinvestigation.