EFFECT OF SURFACE-APPLIED RARE EARTH CONTAINING THIN OXIDE FILMS ON HIGH-TEMPERATURE OXIDATION OF Fe25Cr
表面施加含稀土氧化物薄膜对Fe25Cr高温氧化的“活性元素效应"

The effects of surface-applied CrzOJ and AlZOS thin oxide films containing vari- ous concentrations of Y20s on the high-temperature oxidation behaviour of an ordinary CrzOB former, FeZSCr, have been studied at lOOOC in 10' Pa oxygen. The thin oxide films with Y20, gave rise to a great decrease in the growth rate of the Cr,OS scale and the effect of mul- ti-component films was stronger than the single YIOS film. The morphology of Cr,O, scales changed apparently. The indirect evidences showed that the growth mechnism of the Cr,03 scale converted from predominantly cation diffusing outwards to predominantly anion diffus- ing inwards. A full reactive element effect(REE1 has been developed by the surface-applied thin oxide films with yttrium.