Aluminum Surface Treatment Using Three Different Plasma-Assisted Dry Chemical Processes

Yamamoto, Toshiaki; Yoshizaki, A.; Kuroki, Tetsuo; Okubo, Masaaki

doi:10.1109/tia.2004.834127

Cited by 25 publications

(10 citation statements)

References 11 publications

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“…The existence of N B Π excited molecules is linked, besides metastable pooling, to the threebody recombination for the nitrogen atoms (11) N + N + Ar → N B Π + Ar (11) The Second Positive System (SPS), whose signal is due to the existence of N 2 C 3 Π u excited molecules could either be generated by Penning excitation (1) with Ar metastable atoms or by nitrogen metastable pooling (10). Both formation channels are possible since the existence of both Ar metastable atoms and nitrogen N 2 A 3 Σ + u metastable molecules in the postdischarge region is demonstrated by the emission of Ar lines and the FPS, respectively.…”

Section: N (A σ ) + N (A σ ) → N B π C π + N X σmentioning

confidence: 99%

“…The existence of N 2 B 3 Π g excited molecules is linked, besides metastable pooling, to the three-body recombination for the nitrogen atoms (11) N + N + Ar 0 → N 2 B 3 Π g + Ar 0 (11) and followed by deexcitation by reaction (3) gives place to the FPS, whose presence indicates the existence of metastable N 2 A 3 Σ + u molecules in the postdischarge. Finally, given that no additional energy is supplied to the postdischarge, very few electrons can be created and most of the electrons coming from the discharge are readily lost by recombination.…”

Section: N (A σ ) + N (A σ ) → N B π C π + N X σmentioning

confidence: 99%

“…Dielectric Barrier Discharges (DBDs) have been used for the activation of surfaces of steel [6], chromium [7], and aluminum [8][9][10] because their geometry is more suitable for treating flat surfaces in continuous mode. However, some studies have explored the possibility of using other plasma sources for this purpose, such as radiofrequency or microwave plasmas [11][12][13][14], more suitable for the treatment of small and/or irregular surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Spatial Distribution of Wettability in Aluminum Surfaces Treated with an Atmospheric-Pressure Remote-Plasma

Muñoz

Rincón

Calzada

2019

Metals

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The use of atmospheric-pressure remote plasmas (postdischarge) sustained in argon and argon–nitrogen for the treatment of aluminum surfaces has been studied to better understand the underlying mechanisms responsible for cleaning and activating the surfaces. The effect of the gas composition, treatment distance, and speed on the hydrophilicity of commercial aluminum samples has been studied using the sessile drop method to build spatial profiles of the treated zones. In the case of argon–nitrogen postdischarges, neither the distance to the plasma end (2 < z < 6 cm) nor the treatment speed (2500 < v < 7500 m/s) had a significant impact in the spot radius of the treatment, remaining approximately constant around 6–7 mm. This result seems to indicate that the postdischarge experiments a little expansion at the exit of the tube in which the discharge was created but its action can be considered highly-directional. This fact is essential for the possible industrial implementation of the procedure described in this research. These results have been analyzed together with the composition of active species in the postdischarge by using optical emission spectroscopy, revealing that long lived nitrogen species are required to significantly increase the wettability of the aluminum surfaces.

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Section: N (A σ ) + N (A σ ) → N B π C π + N X σmentioning

confidence: 99%

Section: N (A σ ) + N (A σ ) → N B π C π + N X σmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial Distribution of Wettability in Aluminum Surfaces Treated with an Atmospheric-Pressure Remote-Plasma

Muñoz

Rincón

Calzada

2019

Metals

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show abstract

“…Research on surface modification using atmosphericpressure plasma has been carried out using various materials, such as metals [1][2][3], semiconductors [4,5], glass [6][7][8][9], and polymer resins [10][11][12]. Surface modification of metals has been carried out to improve the hydrophilicity (wettability), the bondability between metals, the adhesion between a metal and a polymer, and the adhesion between a coating material and an adhesive.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophilization of Surface of Aluminum Thin Film by Atmospheric-Pressure Plasma Jet Irradiation

Kuwahata

Murata

Hashimoto

et al. 2018

e-J. Surf. Sci. Nanotech.

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An atmospheric-pressure argon (Ar) plasma jet was generated with a frequency of 10 kHz, an applied voltage of 4 kV, and an Ar gas flow rate of 10 L/min. When an aluminum (Al) thin film that was vacuum-deposited on a glass substrate was irradiated with the atmospheric-pressure Ar plasma jet in air for 60 s at an irradiation distance of 2 mm, the surface of the Al thin film was hydrophilized in a circular area with a diameter of 23 mm, which was larger than that of the plasma (6 mm). It was found that the superhydrophilization first occurred at the periphery of the irradiated area (∼5-10 mm from the center of the irradiated area) and then in the area irradiated directly by the plasma (≤∼5 mm from the center of the irradiated area) on the Al thin film. In the previous research on the atmospheric-pressure plasma jet irradiation of Al, the plasma reached Al, and it was reported that the hydrophilicity only improved in the area irradiated directly by the plasma. On the other hand, our plasma in this study did not reach Al. In spite of this, the hydrophilicity improved in the area irradiated directly by the plasma and in the periphery of the irradiated area. On the basis of the results of X-ray photoelectron spectroscopy (XPS), the hydrophobic organic compounds that adsorbed on the surface of the Al thin film are considered to have been removed by the ozone (O3) generated by the interaction between the plasma and oxygen (O2) molecules in air. From the O3 concentration distribution obtained using O3 test strips, the reason for the faster superhydrophilization in the peripheral area than in the irradiated area was found to be that the peripheral area had the higher concentration of O3.

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“…Plasma treatment, in particular, has been studied as an efficient way to increase surface wettability and hydrophilicity of the Al adherend by providing specified chemical functionalization, as high-speed processing can be realized with blown-ion air plasma surface treatment technology. Plasma treatment has consequently been applied in various fields [16][17][18][19]. Bouchet and Hamelin [20] reported that the influence of surface treatment prior to bonding to improve interfacial adhesion strength in hybrid structures did not provide a significant contribution to SEA values of an Al/CFRP circular tube under dynamic compression.…”

Section: Introductionmentioning

confidence: 99%

The effects of interfacial adhesion strength on the characteristics of an aluminum/CFRP hybrid beam under transverse quasi-static loading

Kim

Lee

2014

Composites Part B: Engineering

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Aluminum Surface Treatment Using Three Different Plasma-Assisted Dry Chemical Processes

Cited by 25 publications

References 11 publications

Spatial Distribution of Wettability in Aluminum Surfaces Treated with an Atmospheric-Pressure Remote-Plasma

Spatial Distribution of Wettability in Aluminum Surfaces Treated with an Atmospheric-Pressure Remote-Plasma

Superhydrophilization of Surface of Aluminum Thin Film by Atmospheric-Pressure Plasma Jet Irradiation

The effects of interfacial adhesion strength on the characteristics of an aluminum/CFRP hybrid beam under transverse quasi-static loading

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