A novel framework to study the role of ground and fumed silica fillers in suppressing DC erosion of silicone rubber outdoor insulation
| Autor: | Eric David, Refat Atef Ghunem, Alhaytham Y. Alqudsi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Thermogravimetric analysis dry-band arcing Control and Optimization Materials science fumed silica 020209 energy Composite number Energy Engineering and Power Technology 02 engineering and technology Surface finish engineering.material Silicone rubber 01 natural sciences complex mixtures HVDC outdoor insulators chemistry.chemical_compound Thermal conductivity erosion performance Filler (materials) 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Composite material Engineering (miscellaneous) Fumed silica 010302 applied physics silicone rubber Renewable Energy Sustainability and the Environment technology industry and agriculture ground silica chemistry engineering Erosion Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 3449, p 3449 (2021) Energies; Volume 14; Issue 12; Pages: 3449 |
| Popis: | This paper investigates the effect of ground and fumed silica fillers on suppressing DC erosion in silicone rubber. Fumed silica and ground silica fillers are incorporated in silicone rubber at different loading levels and comparatively analyzed in this study. Outcomes of the +DC inclined plane tracking erosion test indicate a better erosion performance for the fumed silica filled composite despite having a lower thermal conductivity compared to the ground silica composite. Results of the simultaneous thermogravimetric and thermal differential analyses are correlated with inclined plane tracking erosion test outcomes suggesting that fumed silica suppresses depolymerization and promotes radical based crosslinking in silicone rubber. This finding is evident as higher residue is obtained with the fumed silica filler despite being filled at a significantly lower loading level compared to ground silica. The surface residue morphology obtained, and the roughness determined for the tested samples of the composites in the dry-arc resistance test indicate the formation of a coherent residue with the fumed silica filled composite. Such coherent residue could act as a barrier to shield the unaffected material underneath the damaged surface during dry-band arcing, thereby preventing progressive erosion. The outcomes of this study suggest a significant role for fumed silica promoting more interactions with silicone rubber to suppress DC erosion compared to ground silica fillers. |
| Databáze: | OpenAIRE |
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