Influence of the ZrB2 content on the anti-oxidation ability of ZrB2-SiC coatings in aerobic environments with broad temperature range
| Autor: | Litong Guo, Huilun Shi, Xuanru Ren, Hongao Chu, Wenhao Wang, Ziyu Li, Peng Chen, Peizhong Feng |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Sintering Liquid phase 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology 01 natural sciences Oxygen permeability Chemical engineering 0103 physical sciences Materials Chemistry Ceramics and Composites 0210 nano-technology Dispersion (chemistry) Layer (electronics) |
| Zdroj: | Journal of the European Ceramic Society. 40:203-211 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2019.10.006 |
| Popis: | ZrB2-SiC coatings with different ZrB2 contents were prepared by liquid phase sintering. The oxidation processes of coatings were explained according to TG results of ZrB2-SiC coatings and powders tested from 298 K to 1773 K. Results show that, increasing ZrB2 content made the weight of the samples changed from weight-loss of 10.04% to weight-gain of 0.14%, while the fastest weight-loss regions were narrowed, whose inflection points reduced from 1310℃ to 1050℃. Increasing ZrB2 content made the relative oxygen permeability of the ZrB2-SiC/SiC coatings reduced from 40%–60% to -10%-5%. Increasing ZrB2 content enhanced high-temperature stability of coatings, making final weight of samples changed from weight-loss of 0.16% to weight-gain of 0.11% after oxidation at 1773 K for 200 h. The peeling and dispersion of Zr-oxides formed Zr-B-Si-O compound glass layer, presenting enhanced stability, dispersion strengthening and pinning effect of Zr-oxides, which were responsible for the excellent anti-oxidation protective effect of coatings in a broad temperature region. |
| Databáze: | OpenAIRE |
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