Effects of voltage on microstructure and oxidation resistance of SiB6–MoSi2 coating deposited by pulse arc discharge deposition
| Autor: | Cuiyan Li, Zhang Yongliang, Liyun Cao, Zhang Bo, Wei-Hua Kong, Huang Jianfeng, Lei Zhou, Bo-Ye Zhang, Kongjun Zhu |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Metallurgy General Physics and Astronomy Sintering Surfaces and Interfaces General Chemistry engineering.material Condensed Matter Physics Microstructure Evaporation (deposition) Surfaces Coatings and Films law.invention Electric arc Coating law engineering Crystallization Composite material Deposition (chemistry) Layer (electronics) |
| Zdroj: | Applied Surface Science. 340:43-48 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2015.03.003 |
| Popis: | To protect carbon/carbon (C/C) composites against oxidation, a SiB6–MoSi2 coating was prepared by pulse arc discharge deposition (PADD). The influence of deposition voltage on arc discharge sintering ability, microstructure and oxidation resistance of the SiB6–MoSi2 coatings was investigated. Results show that the oxidation resistance of the coating is improved when the voltage increases from 350 to 450 V. The dense and good crystallization SiB6–MoSi2 coating was obtained with sufficient arc discharge sintering energy when the voltage is 450 V. And the multilayer coatings can protect C/C composites from oxidation in air at 1773 K for 164 h with a weight loss of 2.04%. The evaporation of the molten glass layer and MoO3 is the main reason for the failure of the multilayer coatings. |
| Databáze: | OpenAIRE |
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