Abstract
To improve the high-temperature stability of carbon/carbon (C/C) composites, a LaB 6 -MoSi 2 -ZrB 2 (LMZ) coating was deposited on SiC-encapsulated C/C composites by supersonic atmospheric plasma spraying. The sprayed LMZ coating showed a significant improvement of oxidation and ablation protective abilities relative to MoSi 2 and ZrB 2 coatings, which could protect C/C composites for more than 80 h at 1773 K in static air and 60 s above 2000 K under oxyacetylene flame. La and Zr acted as the role in accelerating the liquid phase sintering of SiO 2 -based oxides, forming a compact Si-Zr-La-O compound scale to enhance the high-temperature stability of LMZ coating.
Original language | English |
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Pages (from-to) | 57-68 |
Number of pages | 12 |
Journal | Corrosion Science |
Volume | 151 |
DOIs | |
State | Published - 1 May 2019 |
Keywords
- Ablation
- Carbon/carbon composites
- Coating
- Oxidation