Pressure Dependence of Phases in Carbon Nanosized Powders for Investigating Cooling Rate of Pulsed Wire Discharge Plasma

Ryota Kobayashi; Seigo Nishimura; Tsuneo Suzuki; Tadachika Nakayama; Hisayuki Suematsu; Wei Hua Jiang; Koichi Niihara

doi:10.4028/www.scientific.net/AMR.11-12.307

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 11-12Pressure Dependence of Phases in Carbon Nanosized...

Pressure Dependence of Phases in Carbon Nanosized Powders for Investigating Cooling Rate of Pulsed Wire Discharge Plasma

Abstract:

We have attempted phase identification of carbon nanosized powders prepared by pulsed wire discharge (PWD) to clarify the cooling process of PWD plasma. To prepare the carbon nanosized powders, carbon fibers were discharged in nitrogen gas at 26 – 101 kPa by PWD. Volume fractions of phases in the carbon nanosized powders were analyzed by thermogravimetric analysis and powder X-ray diffraction. The volume fraction of amorphous carbon, which must be formed by quenching of carbon plasma, was increased with increasing nitrogen gas pressure. This result suggested that the cooling rate of PWD plasma increased with increasing ambient gas pressure.

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Periodical:

Advanced Materials Research (Volumes 11-12)

Pages:

307-310

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.11-12.307

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Online since:

February 2006

Authors:

Ryota Kobayashi, Seigo Nishimura, Tsuneo Suzuki, Tadachika Nakayama, Hisayuki Suematsu, Wei Hua Jiang, Koichi Niihara

Keywords:

Carbon, Nanosized Powder, Plasma, Pulsed Wire Discharge

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