Corrosion Behavior of AlN-MgO Composite in High Temperature Lithium Vapor

Abstract

The corrosion behavior of lithium vapor on AlN composites with three different compositions prepared via plasma assisted sintering in lithium vapor was studied at 550°C. Depending upon the SEM&XRD observations, it is inferred that both MgO and Y2O3 have influences on the corrosion resistance of the composites. The presence of Y2O3 in the composites can adjust the distribution of precipitation phase on the sample surface while the increased content of MgO contributes to a relatively weak corrosion resistance. Among the three composites, the sample with AlN-25%wt MgO-3%wt Y2O3 has the worst corrosion ability.