Abstract
Runaway electrons preionized diffuse discharge (REP DD) could generate volume non-thermal plasmas at atmospheric pressure, thus is widely used for surface modification. In this paper, two pulsed generators are used to produce REP DD for modifying copper (Cu) foil in atmospheric air. One generator produces repetitive pulses with a peak voltage of 40 kV and a rise time of 150 ns. The other generator produces single pulse with a peak voltage of 280 kV and a rise time of 0.5 ns. After the treatment, the modification results for including the macro topography, chemical composition and microhardness in different depths of the Cu surface are analyzed. In order to estimate the modification results in different areas of the Cu foil, several points from the center to the edge of the Cu sample are selected. It could be observed that the maximal modification effect usually appears in the area where the density of the diffuse discharge plasma is highest. The experimental results show REP DD treatment could significantly decrease the water contact angle and increase surface energy of the Cu foil. Meanwhile, it could decrease the carbon concentration and increase oxygen concentration in the near-surface layer of the Cu sample, and enhance the microhardness in different depths of the Cu foil.
| Original language | English |
|---|---|
| Pages (from-to) | 202-209 |
| Number of pages | 8 |
| Journal | Laser and Particle Beams |
| Volume | 34 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jun 2016 |
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Keywords
- Atmospheric pressure
- nanosecond pulse discharge
- plasma treatment
- runaway electrons preionized diffuse discharge
- surface microhardness enhancement
- surface modification of copper
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Modification of copper surface by runaway electrons preionized diffuse discharges at atmospheric pressure. / Zhang, Cheng; Erofeev, Mikhail V.; Fang, Zhi; Shulepov, Mikhail A.; Zhou, Zhongsheng; Tarasenko, Victor Fedotovich; Shao, Tao.
In: Laser and Particle Beams, Vol. 34, No. 2, 01.06.2016, p. 202-209.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Modification of copper surface by runaway electrons preionized diffuse discharges at atmospheric pressure
AU - Zhang, Cheng
AU - Erofeev, Mikhail V.
AU - Fang, Zhi
AU - Shulepov, Mikhail A.
AU - Zhou, Zhongsheng
AU - Tarasenko, Victor Fedotovich
AU - Shao, Tao
PY - 2016/6/1
Y1 - 2016/6/1
N2 - Runaway electrons preionized diffuse discharge (REP DD) could generate volume non-thermal plasmas at atmospheric pressure, thus is widely used for surface modification. In this paper, two pulsed generators are used to produce REP DD for modifying copper (Cu) foil in atmospheric air. One generator produces repetitive pulses with a peak voltage of 40 kV and a rise time of 150 ns. The other generator produces single pulse with a peak voltage of 280 kV and a rise time of 0.5 ns. After the treatment, the modification results for including the macro topography, chemical composition and microhardness in different depths of the Cu surface are analyzed. In order to estimate the modification results in different areas of the Cu foil, several points from the center to the edge of the Cu sample are selected. It could be observed that the maximal modification effect usually appears in the area where the density of the diffuse discharge plasma is highest. The experimental results show REP DD treatment could significantly decrease the water contact angle and increase surface energy of the Cu foil. Meanwhile, it could decrease the carbon concentration and increase oxygen concentration in the near-surface layer of the Cu sample, and enhance the microhardness in different depths of the Cu foil.
AB - Runaway electrons preionized diffuse discharge (REP DD) could generate volume non-thermal plasmas at atmospheric pressure, thus is widely used for surface modification. In this paper, two pulsed generators are used to produce REP DD for modifying copper (Cu) foil in atmospheric air. One generator produces repetitive pulses with a peak voltage of 40 kV and a rise time of 150 ns. The other generator produces single pulse with a peak voltage of 280 kV and a rise time of 0.5 ns. After the treatment, the modification results for including the macro topography, chemical composition and microhardness in different depths of the Cu surface are analyzed. In order to estimate the modification results in different areas of the Cu foil, several points from the center to the edge of the Cu sample are selected. It could be observed that the maximal modification effect usually appears in the area where the density of the diffuse discharge plasma is highest. The experimental results show REP DD treatment could significantly decrease the water contact angle and increase surface energy of the Cu foil. Meanwhile, it could decrease the carbon concentration and increase oxygen concentration in the near-surface layer of the Cu sample, and enhance the microhardness in different depths of the Cu foil.
KW - Atmospheric pressure
KW - nanosecond pulse discharge
KW - plasma treatment
KW - runaway electrons preionized diffuse discharge
KW - surface microhardness enhancement
KW - surface modification of copper
UR - http://www.scopus.com/inward/record.url?scp=84957796351&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957796351&partnerID=8YFLogxK
U2 - 10.1017/S0263034616000033
DO - 10.1017/S0263034616000033
M3 - Article
VL - 34
SP - 202
EP - 209
JO - Laser and Particle Beams
JF - Laser and Particle Beams
SN - 0263-0346
IS - 2
ER -