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Nanoceria Coatings and Their Role on the High Temperature Stability of 316L Stainless Steels

Published online by Cambridge University Press:  01 February 2011

H. Mendoza-Del-Angel  and
H. F Lopez
H. Mendoza-Del-Angel
Affiliation:
Materials Department, University of Wisconsin-Milwaukee, 3200 N. Cramer St. Milwaukee WI 53211
H. F Lopez
Affiliation:
Materials Department, University of Wisconsin-Milwaukee, 3200 N. Cramer St. Milwaukee WI 53211
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Abstract

In this work, a method is considered to produce uniform nanoceria surface coatings on 316L stainless steel such as dipping. Coated steels using the aforementioned method are exposed to high temperature 800–1000°C and their oxidation behavior is investigated. It is found that the nanoceria particles in the implemented coatings exhibit some growth during high temperature exposure. In addition, thermogravimetric determinations of oxidation resistance in coated and bare samples at 900°C clearly indicates that the nanoceria coated stainless steels exhibits a two fold reduction in mass gain when compared with bare ones. Optical and scanning electron microscopy are employed to characterize the developed oxide scale morphologies. It is found that in areas are nanoceria is not uniformly coated, Fe-rich oxide islands develop, whereas in coated regions the scale is Cr and Ce rich indicating that the scale is probably a Ce doped Cr oxide.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1276: Advanced Structural Materials–2010 , 2010 , 18
Copyright
Copyright © Materials Research Society 2010

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