Although stainless steels rely on the formation of
a protective chromium oxide scale, additional oxidation
resistance can be achieved if silicon is added to
the alloy to form a continuous silicon dioxide scale.
Typically, the concentration of silicon required for
this to occur is high enough to form brittle, low
melting temperature phases that are detrimental to
its mechanical properties. Our research involves investigation
of processes by which a silica scale can be formed
rapidly without degradation of alloy mechanical properties,
leading to the development of highly corrosion resistant
alloys with lower concentrations of chromium, which
is both expensive and strategic.
Another area of interest is the study of diffusion
mechanisms in thermally grown protective oxide scales
by the 'tracer oxidation' process. Our research involves
modeling the diffusion process such that the grain
boundary and bulk diffusivities of cations and anions
can be estimated from the tracer concentration profile
in the oxide.
Collaborators
T.
Ando, Northeastern University
Papers
Please click on any active link to read
pdf versions of the articles.
S.N. Basu, Arun K. Pattanaik, and V.K. Sarin, "Oxidation
and Corrosion Resistant CVD Mullite Coatings",
Proceedings of Emerging Trends in Corrosion Control,
Volume 2, A.S. Khanna, K.S. Sharma and A.K. Singha,
Eds., NACE International, Academia Books International,
New Delhi, India, 1999, pp 1016-1025.
S.N. Basu and V.K. Sarin,
"On the Oxidation Behavior of WC-Co", Materials
Science and Engineering, A209, 206 (1996).
S. McDowell, S.N. Basu and T. Ando, "Processing
and Oxidation of Nitride Stabilized 18Cr-20Ni Stainless
Steel", Materials Research Society Symposium
Proceedings, 362, 111 (1995).
C.S. McDowell and S.N. Basu, "Alloy-Grain-Size
Dependence of the Effectiveness of Silica Coatings
as Oxidation Barriers on Stainless Steel", Oxid.
Metals 44 (3/4), 263 (1995).
N. Appannagaari and
S.N. Basu, "Modeling of O-18 Tracer Distribution
During 'Double Oxidation' Experiments for Inward Growing
Scales", Journal of Applied Physics, 78 (3),
2060 (1995).
C.S. McDowell and S. N. Basu, "Effect of Alloy
Grain Size on Oxidation Resistance of Silica- Coated
Stainless Steel", Proceedings of the Microscopy
Society of America, G. W. Bailey and A. J. Garratt-Reed
eds., MSA, pp 676 (1994).
S. N. Basu, D. Nath and J. Tebbets, "Microstructural
Evolution of Multilayered Oxide Scales on Stainless
Steels", Mat. Res. Soc. Sym. Proc. 280, 541 (1993).
Funding
NSF - Processing of Fine-Grained Stainless Steels
for Improved Oxidation Resistance (with T. Ando).
DOE - Corrosion Protection of SiC Based Ceramics
(with V.K. Sarin).
UTC - Study of the ‘Rare Earth Effect’.
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