Ablation behavior of TaB2SiC coating for carbon/carbon composites under oxyacetylene torch
| Autor: | Peng-Fei Zhang, Jiaping Zhang, Jun-Ling Qu, Qiangang Fu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science medicine.medical_treatment Reinforced carbon–carbon 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Ablation 01 natural sciences Surfaces Coatings and Films Oxyacetylene torch stomatognathic system Coating 0103 physical sciences Oxidizing agent Cementation (metallurgy) engineering medicine Composite material 0210 nano-technology Instrumentation Linear ablation |
| Zdroj: | Vacuum. 131:223-230 |
| ISSN: | 0042-207X |
| DOI: | 10.1016/j.vacuum.2016.06.022 |
| Popis: | To protect carbon/carbon (C/C) composites against ablation, a TaB 2 SiC coating was prepared on their surface by pack cementation. Ablation behavior of the coated C/C composites was investigated under oxyacetylene torch. After ablation for 30 s, the linear ablation rate of the TaB 2 SiC coated C/C composites was 4.2 μm/s. Compared with the SiC coated C/C composites and bare C/C composites, the linear ablation rate was reduced by 40% and 51%, respectively. During ablation, a mosaic-structured Ta Si O glassy layer was formed, playing a positive role in preventing oxidizing species from attacking C/C substrate. Oxidation products of TaB 2 , existing as “pinning phases” in the coating, induced the deflection of the crack formed by the attack of oxyacetylene torch, which was beneficial to enhance the stability of TaB 2 SiC coating and improve the ablation resistance. |
| Databáze: | OpenAIRE |
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