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4 results for “deoxidation”
Raw and analyzed data for manuscript "Non-thermal plasma deoxidation of copper, chromium and iron surfaces"
<p><strong>Abstract:</strong> Oxide layers on metal surfaces adversely affect processability and material properties in many industrial applications. While several plasma-based approaches for deoxidation were investigated in the past, oftentimes they either work under conditions expensive to create or need a long time for deoxidation. The deoxidation effect of a non-thermal dielectric barrier discharge (DBD) plasma in an Ar/H<sub>2</sub> gas mixture at 100 hPa and 400 °C was investigated on oxidized copper, iron and chromium surfaces. The chemical structure of surfaces before and after the deoxidation procedure was analyzed by X-ray photoelectron spectroscopy (XPS). The results revealed that the metal oxide layers on copper and iron surfaces were almost completely reduced after 10 minutes of plasma treatment, thereby exposing bare metallic surface states. Chromium surface oxides were only partly removed after deoxidation process without notable reduction in oxide layer thickness, whereas the surface compounds changed from Cr(OH)<sub>3</sub> and CrO<sub>3</sub> to mostly Cr<sub>2</sub>O<sub>3</sub>.</p>
Raw and analysed data for contribution paper "Low temperature plasma deoxidation of copper surfaces"
<p><strong>Abstract</strong>: In this study, the application of a DBD plasma for metal deoxidation was shown on differently oxidized copper surfaces in an Ar/H<sub>2</sub> atmosphere at 100 hPa and room temperature. Plasma treatments with a discharge voltage of 11 kV and a frequency of 8.8 kHz yielded an almost complete deoxidation of samples with native Cu<sub>2</sub>O layers and samples with pre-oxidized CuO layers, both within minutes of the Ar/H<sub>2</sub> plasma treatment. The chemical state of the samples was characterized via X-ray photoelectron spectroscopy (XPS). The plasma was analysed by optical emission spectroscopy (OES). Additionally, confocal laser scanning microscopy (CLSM) images show that the employed deoxidation method did not change the morphology of the copper surfaces.</p>
Raw and analysed data for contribution paper "Investigation of deoxidation mechanisms on Cu surfaces in a dielectric barrier discharge plasma"
<p><strong>Abstract</strong><br> In this study, we present a laboratory setup for the deoxidation of 10 × 10 mm2 samples via dielectric barrier discharge (DBD) plasma and we show results for the deoxidation of copper in an Ar/H2 atmosphere at 1000 hPa. The effect of combined heat and DBD plasma treatment was investigated by heating surfaces up to 250 °C during plasma operation. All results were compared for surfaces before and after plasma treatment. The chemical structure of surfaces was studied using X-ray Photoelectron Spectroscopy (XPS) and the morphology was measured via Confocal Laser Scanning Microscopy (CLSM). Additionally, the properties of the plasma during the reduction of copper oxides were investigated via Optical Emission Spectroscopy (OES).</p>
Analysed data for poster presentation "Dielectric barrier discharge plasma deoxidation of copper and iron surfaces"
<p>Removal of oxygen contaminations from metal surfaces during industrial fabrication processes is an important cleaning step mitigating the negative impact of native oxide layers on the performance of compounds. Different plasma deoxidation techniques were developed to remove such oxide layers. Although a large number of studies were focused on of low-pressure plasma techniques, there is the lack of information on the deoxidation effect of plasmas that operate in the atmospheric pressure range.</p>
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