Abstract
Isothermal oxidation behavior of NbSi2 coating grown on Nb substrate was investigated in air at 1000–1450 °C. Oxidation rate of NbSi2 coating increased with temperature at 1000–1300 °C but opposite trend was observed at 1300–1450 °C. Maximum oxidation rate was obtained at 1300 °C due to the highest porosity of oxide scale. Lowest oxidation rate was observed at 1450 °C due to formation of dense oxide scale by combined effect of volatilization of Nb oxide phase, viscous flow and densification of c-SiO2. Oxidation resistance of NbSi2 coating at these temperatures was governed by some inter-related factors.
Original language | English |
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Pages (from-to) | 102-114 |
Number of pages | 13 |
Journal | Corrosion Science |
Volume | 129 |
DOIs | |
Publication status | Published - 2017 Dec |
Keywords
- A. Intermetallics
- B. SEM
- B. TEM
- B. XRD
- C. Oxidation
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Science(all)