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Fig. 4. SEM images of the carbon whiskers for varied CH4 concentrations: (a) CH4 = 1% (b) CH4 = 5% at Ib = – 300 mA, (c) in the form of cauliflower at Ib = – 600 mA and CH4 = 1% under the following conditions:Tf = 1920 °C, Ts = 850 °C, P = 20 torr, Vb = – 270 V, Ib = – 300 mA, CH4 = 1%), and at substrate temperatures (d) Ts = 850 °C and (e) Ts = 950 °C under the following conditions (Tf = 1920 °C, P = 20 torr, Vb = – 270 V, Ib = – 300 mA, CH4 = 5%).
New Phys.: Sae Mulli 2021;71:457~463 https://doi.org/10.3938/NPSM.71.457
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