The influence of yttrium implantation on impure (C, Mn) iron oxidation at 700 C
The impurity-yttrium interactions have been studied for iron oxidation at 700 C. Yttrium implanted specimens exhibited a better oxidation behaviour compared with blank specimens. On pure iron or the Fe-0.054wt%C alloy the beneficial effect is attributed to the Fe(2)YO(4) formation. With manganese containing alloys (Fe-0.2wt%Mn), the protective effect of yttrium is attributed to the YMnO(3) formation. The best oxidation behaviour is obtained with implanted Fe-0.18wt%Mn-0.041wt%C alloys due to the formation of a YMnO(3) oxide subscale at the scale/alloy interface. Yttrium implantation also hinders carbon segregation at the oxide/alloy interface. This effect insures a better scale adherence. With the most impure alloy, yttrium implantation also changes the growth process from external cation diffusion to predominant inward oxygen diffusion.
Bibliographic Reference: Article: Oxidation of Metals (1997)
Record Number: 199810115 / Last updated on: 1998-02-12
Original language: en
Available languages: en