Understanding the Mechanism of Nanoparticle Formation in a Wire Explosion Process by Adopting the Optical Emission Technique

B. DEBALINA; M. KAMARAJ; S. R. CHAKRAVARTHI; N. J. VASA; R. SARATHI

doi:10.1088/1009-0630/15/6/14

Plasma Science and Technology > 2013 > 15(6): 562-569. > DOI: 10.1088/1009-0630/15/6/14

B. DEBALINA, M. KAMARAJ, S. R. CHAKRAVARTHI, N. J. VASA, R. SARATHI. Understanding the Mechanism of Nanoparticle Formation in a Wire Explosion Process by Adopting the Optical Emission Technique[J]. Plasma Science and Technology, 2013, 15(6): 562-569. DOI: 10.1088/1009-0630/15/6/14

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Understanding the Mechanism of Nanoparticle Formation in a Wire Explosion Process by Adopting the Optical Emission Technique

1 Dept. of Metallurgical and Materials Engg., IIT Madras, Chennai 600036, India 2 Dept. of Aerospace Engg., IIT Madras, Chennai 600036, India 3 Dept. of Engineering Design, IIT Madras, Chennai 600036, India 4 Dept. of Electrical Engg., IIT Madras, Chennai 600036, India

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Received Date: November 06, 2011

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Abstract

Abstract

In the present study nano-tungsten carbide particles were generated in a wire explo- sion process. The plasma generated during the wire explosion process was analyzed using optical emission spectroscopy (OES). The impact of ambient pressure on the plasma temperature, elec- tron density and plasma lifetime was studied. Lifetime variations of the plasma produced under different experimental conditions were analyzed. The produced nanoparticles were characterized through wide angle X-ray diffraction (WAXD) and transmission electron microscopy (TEM) stud- ies. Particles produced with a negative DC charging voltage had a larger mean size when compared to a positive charging voltage. Polarity dependence on the plasma duration was observed where plasma was sustained for a longer duration with a negative DC charging voltage.
- optical emission,
- wire explosion,
- tungsten carbide,
- life time,
- nano particle

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