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Investigations of Tracking Phenomena in Silicone Rubber Using Moving Average Current Technique 认领 引用
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作者 R.Sarathi S.Chandrasekar 《Plasma Science and Technology》 SCIE EI CAS 2004年第5期2514-2520,共7页
In the present work, tracking phenomenon in Silicone rubber material has beenstudied under AC and DC voltage, with ammonium chloride as a contaminant. It is observed that thetracking is more severe under the DC voltag... In the present work, tracking phenomenon in Silicone rubber material has beenstudied under AC and DC voltage, with ammonium chloride as a contaminant. It is observed that thetracking is more severe under the DC voltages. The tracking time is less under negative DC comparedto the positive DC voltage. The tracking mechanism is explained in detail. The leakage currentduring the tracking studies was as measured and the moving average technique was adopted tounderstand the trend in current flow. The leakage current magnitude is high with thermally agedspecimens compared to the virgin specimen, irrespective of the type of applied voltage. It isrealized that the tracking time and the leakage current magnitude shows an inverse relationship. 展开更多
关键词 discharges polymers silicone rubber tracking moving average technique leakage current measurement
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Understanding the Mechanism of Nanoparticle Formation in a Wire Explosion Process by Adopting the Optical Emission Technique 认领 引用
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作者 B.DEBALINA M.KAMARAJ +2 位作者 S.R.CHAKRAVARTHI N.J.VASA R.SARATHI 《Plasma Science and Technology》 SCIE EI CAS CSCD 2013年第6期562-569,共8页
In the present study nano-tungsten carbide particles were generated in a wire explosion process.The plasma generated during the wire explosion process was analyzed using optical emission spectroscopy（OES）.The impact... In the present study nano-tungsten carbide particles were generated in a wire explosion process.The plasma generated during the wire explosion process was analyzed using optical emission spectroscopy（OES）.The impact of ambient pressure on the plasma temperature,electron density and plasma lifetime was studied.Lifetime variations of the plasma produced under different experimental conditions were analyzed.The produced nanoparticles were characterized through wide angle X-ray diffraction（WAXD） and transmission electron microscopy（TEM） studies. Particles produced with a negative DC charging voltage had a larger mean size when compared to a positive charging voltage.Polarity dependence on the plasma duration was observed where plasma was sustained for a longer duration with a negative DC charging voltage. 展开更多
关键词 optical emission wire explosion tungsten carbide life time nano particle
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Mineral Oil-Induced Ageing Characteristics of Aluminium Nitride-Doped Silicone Rubber Nanocomposites 认领 引用
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作者 Dhanunjaya Naidu Vangapandu Palash Mishra +4 位作者 Pawel Rozga R.Sarathi Mithun Mondal M.Tariq Nazir Chillu Naresh 《High Voltage》 SCIE EI CSCD 2026年第3期811-822,共12页
Room temperature vulcanised(RTV)silicone rubber,commonly used as an external insulating coating on ceramic bushings of oil-immersed transformers,undergoes significant degradation when exposed to mineral oil under hars... Room temperature vulcanised(RTV)silicone rubber,commonly used as an external insulating coating on ceramic bushings of oil-immersed transformers,undergoes significant degradation when exposed to mineral oil under harsh environmental conditions.Therefore,the present study investigates the ageing characteristics of aluminium nitride(AlN)-doped silicone rubber nanocomposites subjected to mineral oil ageing at 80℃for 200 h.Nanocomposites with 0,1 wt.%,3 wt.%and 5 wt.%AlN were fabricated.Post-ageing,Fourier transform infrared spectroscopy(FTIR)confirmed the scission of side chains and main backbone chains in the silicone rubber matrix.This degradation resulted in decreased surface hydrophobicity and shore hardness,along with increased surface roughness,as evidenced by contact angle measurements,shore hardness testing and 3-D microscopy,respectively.Surface potential measurements indicated reduced surface charge dissipation capability in the aged specimens.Additionally,inclined plane tracking and erosion(IPT-E)tests performed according to IEC 60587 revealed a significant decline in tracking and erosion resistance.Thermogravimetric analysis and IR thermography showed reduced thermal stability and increased heat accumulation in the aged samples.Overall,the 3 wt.%of AlN-doped nanocomposite demonstrated superior resistance to degradation,suggesting its potential for improved performance under mineral oil ageing conditions for transformer bushing applications. 展开更多
关键词 mineral oil silicone rubber nanocomposites silicone rubber ageing characteristics nanocomposites insulating coating ceramic bushings aluminium nitride
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