Atmospheric Plasma Treatment of Metals is a wide field of research. The following are just a few of the articles, papers and publications on atmospheric plasma treatment of metals address key topics such as plasma materials processing, metal surface treatments, metal surface cleaning, metal oxidation, oxidation removal, surface preparation prior to bonding, coating, printing and marking, atmospheric pressure plasmas, plasma density, breakdown voltage, non-equilibrium plasmas, thermal plasmas and gas temperature.
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- Edington, J., Padwal, A., Williams, A., O’Keefe, J., and O’Keefe, T, J., “Metal surface preparation tips: a study on the effect of an atmospheric cold plasma pre-treatment on the surface of aircraft aluminum alloys and in cerium conversion coating deposition processes,” Met. Finish. 103, 38 (2005). Abstract: This material is presented to ensure timely dissemination of scholarly and technical work.
- Kim, M. C., Song, D. K., Shin, H. S., Baeg, S. H., Kim, G. S., Boo, J. H., Han, J. G., and Yang, S. H., “Surface modification for hydrophilic property of stainless steel treated by atmospheric-pressure plasma jet,” Surf. Coat. Technol. 171, 312 (2003). Abstract: Surface of a stainless steel has been modified by atmospheric-pressure plasma jet method at room temperature. The impulse voltage is applied to ignite a plasma discharge using high purity (99.999%) reactive gases: N2 and O2. The treated stainless steel is characterized by the activation property of the surface using a contact angle analyzer. Surface energy for the treated stainless steel is increased remarkably when compared to the untreated surface. From the results of X-ray photoelectron spectroscopy and atomic force microscopy, we could confirm that the main functional groups, causing the change in hydrophilic surface were generated under the surface reactions caused by reactive etching and oxidation of ions and activated species in the plasma. In addition, the aging effect during the duration of the hydrophilic property is also studied to investigate the production cost for the industrial applications.
- Kim, M. C., Yang, S. H., Boo, J. H., and Han, J. G., “Surface treatment of metals using an atmospheric pressure plasma jet and their surface characteristics,” Surf. Coat. Technol. 174, 839 (2003). Abstract: We have treated the surfaces of Al, SUS and Cu metals using an atmospheric-pressure plasma jet generated by nitrogen and oxygen gases under the atmospheric pressure at room temperature. The plasma ignition occurred by flowing mixed gases between two coaxial metal electrodes, and the voltage was applied with impulse type and 16–20 kHz frequencies. The treated surfaces were basically characterized by means of a contact angle analyzer for the activation property on their surfaces. From the results of XPS, FE-SEM, OES and AFM, we could confirm that the main phenomena such as the reactive etching and oxidation were observed on their surfaces as well as even the aggregation of particles by the activated atoms, radicals and metastable species in the plasma space. However, all treated surfaces contained only oxygen and carbon without nitrogen, even though the excited nitrogen species were generated in the plasma due to its higher reactivity than oxygen ones observed in the OES data. The aging effect on the duration time of the surface energy, moreover, was also studied because of the production cost on the industrial applications in addition.
- Chan, I. M., Cheng, W. C., and Hong, F. C., “Enhanced performance of organic light-emitting devices by atmospheric plasma treatment of indium tin oxide surfaces,” Appl. Phys. Lett.,b>80, 13 (2002). Abstract: Atmospheric plasma treatment of indium tin oxide ~ITO! surfaces has been studied and demonstrated to be the most efficient method in improving the performance of vacuum-deposited double-layer organic light-emitting diode devices, among various plasma treatment methods including low-pressure Ar plasma and low-pressure O2 plasma treatment. Although with a current–voltage characteristic close to low-pressure O2 plasma treatment, the atmospheric plasma treatment exhibits a 40% increase of electroluminescence efficiency. X-ray photoelectron spectroscopy results show that the atmospheric plasma treatment increases the work function and reduces the carbon contamination of ITO surfaces. Our results suggest that atmospheric plasma treatment is a cheaper, more convenient, and more efficient method than low-pressure O2 plasma treatment for improving device performance.