Influence of Rare-Earth Yttrium on High-Temperature Oxidation Behavior of Fe-Si Alloys

Content Provider	Scilit
Author	Su, Yong Desong, Meng Liu, Qun Fu, Guangyan Wu, Jingdong Yu, Sijie Yu, Zhenhui
Copyright Year	2013
Abstract	The high-temperature oxidation behavior of Fe-Si-Y alloys has been studied at 1173 and 1273 K in 0.1 MPa flowing pure O2. Results show that as the content of rare-earth yttrium raises, the grain size of Fe-Si-Y alloys decreases obviously, which increases grain boundaries in the alloys. The grain size of the oxides formed on the grain-fined alloys is also decreased. These enhance the diffusion rate of the alloying elements through the alloy matrix and oxide scales, and promotes the formation of SiO2 and Y2O3. However, a single and continuous SiO2 or Y2O3 scale still does not form on yttrium-containing alloys when being oxidized at 1173 or 1273 K, but their rapid formation and partial lateral connection due to the grain refinement can restrain the element diffusion in the alloys to some extents, and thus the oxidation resistance of the alloys is improved. The mechanism related with the effect of the grain refinement resulting from the addition of rare-earth yttrium on high-temperature oxidation behavior of Fe-Si alloys is also discussed.
Related Links	http://www.degruyter.com/downloadpdf/j/htmp.2014.33.issue-3/htmp-2013-0038/htmp-2013-0038.xml
Ending Page	292
Page Count	6
Starting Page	287
ISSN	03346455
e-ISSN	21910324
DOI	10.1515/htmp-2013-0038
Journal	High Temperature Materials and Processes
Issue Number	3
Volume Number	33
Language	English
Publisher	Walter de Gruyter GmbH
Publisher Date	2013-10-29
Access Restriction	Open
Subject Keyword	High Temperature Materials and Processes Ceramics Oxidation Rare Earth Grain Refinement Yttrium Fe-si Alloy Journal: High Temperature Materials and Processes, Vol- 33
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Physical and Theoretical Chemistry Condensed Matter Physics Materials Science