Affiliation:
1. Xi'an University of Technology
Abstract
Fe-25wt%Cr alloys were fabricated by combining Powder Metallurgy (PM) with hot-forging treatment, and their oxidation behavior at 1100°C in air was investigated systematically by using XRD, SEM and EDS, respectively. The results showed that a composite oxidation scale containing both Cr2O3and FeCr2O4formed on the surface of as-forged Fe-25wt%Cr alloys after oxidation at 1100°C in air for 100 hours. The oxidation process of Fe-Cr alloys could be obviously divided into two different stages, and the kinetics of two-stage oxidation agreed well with the parabolic law. The first could be corresponding to the formation of protective Cr2O3layer, while the second could be thought as the growth of FeCr2O4and the further oxidation of the inner Cr2O3oxidation scale. The faster oxidation rate in the second stage could be attributed to both the diffusion of iron ions rapider than that of Cr in the Cr2O3layer and the fast transport velocity of oxygen ions along the cracks.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference9 articles.
1. Y. Niu, S. Wang and etc: Corros. Sci. Vol. 50(2008), p.345.
2. H.U. Anderson and F. Tietz, High Temperature Solid Oxide Fuel Cells: Fundamentals, Design and Applications, S.C. Singhal and K. Kendall, Eds., Elsevier Advanced Technology, Oxford, UK (2003).
3. J.W. Fergus: Mater. Sci. Eng., A Vol. 397 (2005), p.271.
4. G. Bonny, D. Terentyev and L. Malerba: Scripta Mater. Vol. 59 (2008), p.1193.
5. T. Horita, H. Kishimoto and etc: Solid State Ionics Vol. 179 (2008), p.1320.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献