2018
DOI: 10.1051/epjap/2018180073
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Experimental study of polymethyl methacrylate: damage under corona discharge

Abstract: In high-voltage applications, insulators may be exposed to corona discharges during long periods. In this experimental work, corona discharge tests of different durations are carried out in air at atmospheric pressure on polymethyl methacrylate (PMMA) samples. The resulting surface degradation is studied with several techniques. The surface damages are observed with environmental scanning electron microscope and atomic force microscopy. The results show that electrical trees occur on the surface of material an… Show more

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Cited by 3 publications
(2 citation statements)
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“…The soft plasma is homogenously generated by glow discharge of low‐pressure (<20 Pa) oxygen, because higher pressure could induce filamentous discharging that inhomogeneously damages the underneath materials. [ 22–26 ] It is worth mentioning that the Y‐shape optical fiber, which has a reflection light channel in the fiber center surrounded by six incident light channels, is employed during the in situ experiment, so that the incident angle is 0°. The transmission light is in situ collected by another fiber.…”
Section: Resultsmentioning
confidence: 99%
“…The soft plasma is homogenously generated by glow discharge of low‐pressure (<20 Pa) oxygen, because higher pressure could induce filamentous discharging that inhomogeneously damages the underneath materials. [ 22–26 ] It is worth mentioning that the Y‐shape optical fiber, which has a reflection light channel in the fiber center surrounded by six incident light channels, is employed during the in situ experiment, so that the incident angle is 0°. The transmission light is in situ collected by another fiber.…”
Section: Resultsmentioning
confidence: 99%
“…The experimental arrangement used is described elsewhere. 31 The resistivity results are the average value of three repeated measurements at room temperature. For the surface potential measurement, the procedure described by Belhaj et al 32 was followed, using X-ray and electron spectroscopy under irradiation in a scanning electron microscope (SEM).…”
Section: Electrical Measurementsmentioning
confidence: 99%