Journal
CORROSION SCIENCE
Volume 169, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2020.108638
Keywords
Metal coatings; Oxidation; Interfaces; Kinetic parameters
Funding
- National Natural Science Foundation of China [U1435201, 51431003]
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Mo-62Si-5B coating was prepared by spark plasma sintering (SPS) to protect Nb-Si based alloy from oxidation. Oxidation and interdiffusion behavior of Mo-62Si-5B coating on Nb-Si based alloy was investigated in air over the temperature range of 1200-1300 degrees C. With the oxidation temperature increasing, the oxidation rate constant of the specimen increases. The activation energy for oxidation is calculated as 124 +/- 9 kJ/mol. Growth of the interdiffusion zone obeys the parabolic law. The activation energy for the growth of the interdiffusion zone is 187 +/- 2 kJ/mol. The interdiffusion coefficients of Si in the interdiffusion zone at 1200 degrees C, 1250 degrees C and 1300 degrees C are calculated.
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