| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1657055 | Surface and Coatings Technology | 2015 | 9 Pages |
•ZrB2–MoSi2 composite coatings were fabricated by low pressure plasma spray (LPPS) technique.•The effect of MoSi2 content on the oxidation behaviors at 1200 °C and 1500 °C was focused.•Corrosion processes and products were characterized and analyzed.•Improved oxidation resistance was observed with increasing MoSi2 content.
In this work, ZrB2-based composite coatings with different contents of MoSi2 were fabricated by low pressure plasma spray (LPPS) technique. The oxidation behavior and microstructure evolution of the ZrB2–MoSi2 composite coatings were characterized at 1200 °C and 1500 °C. The results showed that the ZrB2–MoSi2 coatings exhibited lamellar microstrucuture with uniform MoSi2 distribution in the ZrB2 matrix. Silica, m-ZrO2, zircon and small amount of MoB were formed after the oxidation at 1200 °C. While only silica, m-ZrO2 and zircon were formed at 1500 °C. The increase of MoSi2 is helpful to improve the oxidation resistance of the composite coatings. The thickness of the total oxidized layer of ZrB2–40 vol.% MoSi2 coating was about 17–22 μm after 6 h oxidation at 1200 °C and 264–270 μm after 6 h oxidation at 1500 °C.
