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XIE Qing (谢庆), LIU Xiong (刘熊), ZHANG Cheng (章程), WANG Ruixue (王瑞雪), RAO Zhangquan (饶章权), SHAO Tao (邵涛). Aging Characteristics on Epoxy Resin Surface Under Repetitive Microsecond Pulses in Air at Atmospheric Pressure[J]. Plasma Science and Technology, 2016, 18(3): 325-330. DOI: 10.1088/1009-0630/18/3/18
Citation: XIE Qing (谢庆), LIU Xiong (刘熊), ZHANG Cheng (章程), WANG Ruixue (王瑞雪), RAO Zhangquan (饶章权), SHAO Tao (邵涛). Aging Characteristics on Epoxy Resin Surface Under Repetitive Microsecond Pulses in Air at Atmospheric Pressure[J]. Plasma Science and Technology, 2016, 18(3): 325-330. DOI: 10.1088/1009-0630/18/3/18

Aging Characteristics on Epoxy Resin Surface Under Repetitive Microsecond Pulses in Air at Atmospheric Pressure

Funds: supported by the Natural Science Foundation of Hebei Province (No. E2015502081), National Natural Science Foundation of China (Nos. 51222701, 51307060), and the National Basic Research Program of China (No. 2014CB239505-3)
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  • Received Date: September 06, 2015
  • Research on aging characteristics of epoxy resin (EP) under repetitive microsecond pulses is important for the design of insulating materials in high power apparatus. It is because that very fast transient overvoltage always occurs in a power system, which causes flashover and is one of the main factors causing aging effects of EP materials. Therefore, it is essential to obtain a better understanding of the aging effect on an EP surface resulting from flashover. In this work, aging effects on an EP surface were investigated by surface flashover discharge under repetitive microsecond pulses in atmospheric pressure. The investigations of parameters such as the surface micro-morphology and chemical composition of the insulation material under different degrees of aging were conducted with the aid of measurement methods such as atomic force microscopy (AFM), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Results showed that with the accumulation of aging energy on the material surface, the particles formed on the material surface increased both in number and size, leading to the growth of surface roughness and a reduction in the water contact angle; the surface also became more absorbent. Furthermore, in the aging process, the molecular chains of EP on the surface were broken, resulting in oxidation and carbonisation.
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