Investigation of water droplet-initiated discharges on laser textured silicone nano-micro composites using UHF and fluorescent fibre techniques

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Somasundaram Karthikeyan Amizhtan, Parvathy Ganesh, Balaji Srinivasan, Nilesh J. Vasa, Sivanandam Aravindan, Ramanujam Sarathi
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Abstract

Laser texturing has been carried out on the surface of the silicone nano-micro composites to achieve super hydrophobic properties, and water droplet-initiated Corona discharge studies were carried out. The Corona inception voltage (CIV) exhibits considerable enhancement with increase in the nano filler content under DC voltage compared with AC voltage. The corona inception voltage is high with the textured surface and is found to have direct correlation with contact angle of the composite specimen. The Corona inception voltage was measured using Ultra-high frequency (UHF) and fluorescent fibre techniques. It is observed that the fluorescent fibre technique is more sensitive in identifying discharges. Frequency domain analysis of UHF signal shows a dominant frequency at 1 GHz and for fluorescent signal, the spectral content is in the range of DC to 10 MHz. The rise time and pulse width of the UHF signal increases with the increase in the nano filler in composite material. The energy content of UHF/fluorescent signal due to discharges shows similar trend with its increase in energy with variation in its magnitude of the signal formed. The pulse width of fluorescent signal formed due to water droplet-initiated discharges under AC and DC voltage is almost the same, and with the textured specimen it is quite low than the non-textured material.

Abstract Image

利用超高频和荧光纤维技术研究激光织构硅纳米微复合材料的水滴引发放电
在硅纳米微复合材料表面进行激光织构以获得超疏水性,并进行了水滴引发电晕放电的研究。与交流电压相比,随着纳米填料含量的增加,直流电压下的电晕起始电压(CIV)明显增强。电晕起始电压在织构表面较高,且与复合试样的接触角有直接关系。采用超高频(UHF)和荧光光纤技术测量电晕起始电压。观察到荧光纤维技术在识别放电方面更为灵敏。UHF信号的频域分析显示其主导频率为1ghz,荧光信号的频谱含量在DC ~ 10mhz范围内。随着复合材料中纳米填料含量的增加,超高频信号的上升时间和脉宽增加。放电引起的超高频/荧光信号的能量含量也表现出类似的趋势,随信号强度的变化而增加。在交直流电压下,水滴引发放电形成的荧光信号脉宽几乎相同,且织构试样的脉宽比未织构材料的脉宽低得多。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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