Deposition and ablation resistance of HfC-based coatings prepared on SiC-coated C/C composites by supersonic atmospheric plasma spraying
| Autor: | Zhanglong Zhao, Hao Li, Yong Yang, Kun Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science medicine.medical_treatment Oxide chemistry.chemical_element Atmospheric-pressure plasma 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Ablation Microstructure 01 natural sciences Industrial and Manufacturing Engineering chemistry.chemical_compound chemistry Coating 0103 physical sciences Ceramics and Composites medicine engineering Composite material 0210 nano-technology Layer (electronics) Carbon Deposition (law) |
| Zdroj: | Advances in Applied Ceramics. 115:473-482 |
| ISSN: | 1743-6761 1743-6753 |
| DOI: | 10.1080/17436753.2016.1193333 |
| Popis: | In order to improve the ablation properties of C/C composites, HfC-based coatings with different mass ratios of SiC were deposited on the surface of SiC-coated carbon/carbon composites by supersonic atmospheric plasma spraying. The morphologies and microstructures of the HfC-based coatings were characterised. The ablation resistance test was carried out by oxyacetylene torch. The results show that the as-prepared coatings are multiphase coatings consisting of HfC, HfO2, SiC and SiO2. The structure of different coatings is dense. After ablation for 60 s, the ablation centre region of coating is smooth without obvious microcrack and pinhole, and no interlaminar crack can be observed at the cross-section. An Hf–Si–O compound oxide layer is generated on the surface of coating, which is beneficial for protecting the C/C composites from being ablated. Meanwhile, the further generated HfSiO4 can play a pinning effect, which can prevent crack extension. |
| Databáze: | OpenAIRE |
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