Journal
CORROSION SCIENCE
Volume 93, Issue -, Pages 126-137Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.01.013
Keywords
Alloy; Metal coatings; Intermetallic; Oxidation
Funding
- National Natural Science Foundation of China [51401166, 51371145, 51431003]
- Research Fund of the State Key Laboratory of Solidification Processing in NWPU [116-QP-2014]
- Natural Science Basic Research Plan in Shaanxi Province of China [2014JQ6215]
- Aeronautical Science Foundation of China [2014ZF53075]
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In this work, we study the oxidation behavior of a B-modified suicide coating at 900-1350 degrees C. The coating was prepared by pack cementation, which mainly consisted of a (Nb,X)Si-2 + (Nb,X)B-2 outer layer, a (Nb,X)Si-2 intermediate layer and an inner layer. At 900 and 1250 degrees C, the evolution of the mass gain versus time showed parabolic-like kinetics; while at 1350 degrees C, the evolution seemed to follow a linear-like kinetic, but could protect the alloy from oxidation for at least 60 h. The good oxidation resistance of the B-modified silicide coating was attributed to the formation of a dense glass-like scale. (C) 2015 Elsevier Ltd. All rights reserved.
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