High frequency capacitively coupled RF plasma discharge effects on the order/disorder structure of PAN-based carbon fiber
Publish place: Journal of Theoretical and Applied Physics، Vol: 8، Issue: 2
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JTAP-8-2_005
تاریخ نمایه سازی: 27 مرداد 1397
Abstract:
High-resolution confocal Raman microscopywas used to investigate the effects of nitrogen plasma onunsized high strength (HS) PAN-based carbon fiber surfaces.The fibers were treated by a high frequency (40.68MHz) capacitively coupled single RF-PECVD reactorunder different processing conditions (exposure times, RFpowers and gas pressures). It was found that the order/disorder structure of the treated carbon fiber changed withdifferent processing conditions. At low pressures, thedegree of disordered structure increased with HF–RFpower and process time. However, at high pressures, highorderstructure (IG=IT ¼ 84:51%) was observed andalmost no observable structural effects appeared at longtreatment time. Also, the first-order Raman-band peaks (Dand G) of the treated carbon fibers shifted. And, FWHM(wD=wG), intensity (ID=IG) and D-band relative integratedintensity (ID=IT) ratios increased with orderingwhereas they decreased with disordering.
Authors
U¨mmugu¨l E. Gu¨ngo¨r
Department of Physics, Middle East Technical University, ۰۶۸۰۰ Ankara, Turkey
Sinan Bilikmen
Department of Physics, Middle East Technical University, ۰۶۸۰۰ Ankara, Turkey
Demiral Akbar
Advance Technology Research Center, Hacettepe University, Beytepe Campus, Beytepe, ۰۶۸۰۰ Ankara, Turkey