Enhanced bonding strength and thermal cycling performance of MoSi2–CrSi2–SiC–Si coating for carbon/carbon composites by surface modification via blasting treatment
| Autor: | Jiaping Zhang, Jun-Ling Qu, Qiangang Fu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Reinforced carbon–carbon chemistry.chemical_element 02 engineering and technology Substrate (electronics) Temperature cycling engineering.material 021001 nanoscience & nanotechnology Cementation (geology) 01 natural sciences Thermal expansion Surfaces Coatings and Films Electronic Optical and Magnetic Materials Coating chemistry 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Surface modification Composite material 0210 nano-technology Carbon |
| Zdroj: | Ceramics International. 42:14021-14027 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2016.06.008 |
| Popis: | Before the preparation of MoSi 2 –CrSi 2 –SiC–Si coating, blasting treatment of carbon/carbon (C/C) composites, as a surface modification method, was conducted under oxyacetylene torch. MoSi 2 –CrSi 2 –SiC–Si coating was prepared on the treated C/C composites by pack cementation, where an interlock interface was formed between the coating and the C/C substrate. After blasting treatment, the thermal expansion coefficient mismatch between the coating and C/C substrate was alleviated efficiently, and the bonding strength of the coating was increased by 45.6% and reached 26.2 MPa. To simulate the real working condition, thermal cycling test was conducted under oxyacetylene torch from 1600 °C to room temperature to construct an environment of combustion gas erosion. Due to the improvement of bonding strength and the alleviation of thermal expansion coefficient mismatch between the coating and the C/C substrate, thermal cycling performance of MoSi 2 –CrSi 2 –SiC–Si coating was enhanced. After 25 thermal cycles, the mass loss of the coated C/C composites without blasting treatment was up to 2.4%, and the C/C substrate was partially exposed. In contrast, the mass loss of the coated C/C composites with blasting treatment was only 1.1%. |
| Databáze: | OpenAIRE |
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