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Understanding surface discharge activity with epoxy silicon carbide nanocomposites
Published in John Wiley and Sons Inc.
2017
Volume: 57
   
Issue: 12
Pages: 1349 - 1355
Abstract
Surface discharge inception voltage (SDIV) with epoxy silicon carbide nanocomposite material in LN2 medium is about three times higher than that in air. Under AC voltage that SDIV increases with increase in wt% of silicon carbide (SIC) material in epoxy nanocomposites. Dielectric measurements indicates an increase in temperature of the specimen and the weight percentage of SIC filler in epoxy resin increases the permittivity of the material. Also, irrespective of percentage of SiC in epoxy resin, the tan(δ) reduces with increase in frequency and the converse at room temperature. The UHF signal measured during surface discharge activity in air/LN2 medium has frequency content in the range of 0.5–1.5 GHz. The charge decay characteristics of epoxy SiC nanocomposites indicate the deposited charge is less and the charge decay time reduces with increase in wt% of SiC in epoxy resin. The surface roughness caused due to surface discharge activity is high under negative DC voltage compared with positive DC/AC voltage. The phase resolved partial discharge (PRPD) analysis indicates discharges occur at the near peak of the AC voltage on inception of surface discharge and at higher stress it appears at the rising portion of AC voltage. POLYM. ENG. SCI., 57:1349–1355, 2017. © 2017 Society of Plastics Engineers. © 2017 Society of Plastics Engineers
About the journal
JournalData powered by TypesetPolymer Engineering and Science
PublisherData powered by TypesetJohn Wiley and Sons Inc.
ISSN00323888
Open AccessNo
Concepts (16)
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    Epoxy resins
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    Nanocomposites
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    Partial discharges
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    Permittivity
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    Silicon
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    Silicon carbide
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    Surface roughness
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    Dielectric measurements
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    DISCHARGE ACTIVITIES
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    DISCHARGE INCEPTION VOLTAGES
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    Epoxy nanocomposites
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    Frequency contents
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    PHASE RESOLVED PARTIAL DISCHARGES
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    SILICON CARBIDES (SIC)
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    Weight percentages
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    SURFACE DISCHARGES