| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469308 | Corrosion Science | 2013 | 7 Pages |
The transient stage during isothermal oxidation of Mo76Si14B10 has been studied at 1150 °C. The maximum mass loss is found to occur by volatilization of MoO3 within the first 480 s of exposure, which is considered to be the transient period. Scanning electron microscopic studies have revealed that a glassy borosilicate layer flows to cover the top surface, and thereby it acts as a protective coating. The thickness of the borosilicate layer increases with exposure time following a parabolic relationship. The mechanism of oxidation during transient period has been discussed with the help of an analytical model.
► MoO3 evaporates during oxidation of Mo76Si14B10 at 1150 °C, thus mass loss occurs. ► The transient period during oxidation is confined within 480 s of exposure. ► The growth of protective borosilicate layer follows a parabolic rate law. ► An analytical model is proposed to explain the mechanism of protection.
