Blar i NTNU Open på forfatter "Raaen, Steinar"
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Partial Discharges on an Epoxy Surface due to Water Droplets
Grieg, Bernt Milne (Master thesis, 2011)Offshore wind turbines are exposed to a very harsh environment and can sustain significant damage during operation. In this thesis work, the possibilities of partial discharges in an insulation system of an offshore wind ... -
Phosphate Coatings Enriched with Copper on Titanium Substrate Fabricated Via DC-PEO Process
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Kacalak, Wojciech; Tandecka, Katarzyna; Raaen, Steinar; Gaiaschi, Sofia; Chapon, Patrick; Malorny, Winfried; Matysek, Dalibor; Pietrzak, Kornel; Dudek, Lukasz (Peer reviewed; Journal article, 2020)The present paper covers the possible ways to fabricate advanced porous coatings that are enriched in copper on a titanium substrate through Direct Current Plasma Electrolytic Oxidation (DC-PEO) with voltage control, in ... -
Porous Coatings Containing Copper and Phosphorus Obtained by Plasma Electrolytic Oxidation of Titanium
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Kacalak, Wojciech; Tandecka, Katarzyna; Raaen, Steinar; Gaiaschi, Sofia; Chapon, Patrick; malorny, winfried; Matysek, Dalibor; Pietrzak, Kornel; Czerwinska, Ewa; Iwanek, Anna; Dudek, Lukasz (Journal article; Peer reviewed, 2020)To fabricate porous copper coatings on titanium, we used the process of plasma electrolyticoxidation (PEO) with voltage control. For all experiments, the three-phase step-up transformer withsix-diode Graetz bridge was used. ... -
SEM, EDS and XPS Analysis of the Coatings Obtained on Titanium after Plasma Electrolytic Oxidation in Electrolytes Containing Copper Nitrate
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Matysek, Dalibor; Raaen, Steinar; Valicek, Jan; Dudek, Lukasz; Harnicarova, Marta (Journal article; Peer reviewed, 2016)In the paper, the Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS) results of the surface layer formed on pure titanium after plasma electrolytic ... -
SEM, EDS and XPS studies of AC & DC PEO coatings obtained on titanium substrate
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Dudek, Lukasz; Pietrzak, Kornel; Raaen, Steinar; Malorny, Winfried; Ciuperca, Radion (Journal article; Peer reviewed, 2019)The porous coatings may be fabricated on titanium substrate by Plasma Electrolytic Oxidation (PEO), known also as Micro Arc Oxidation (MAO), under AC or DC regimes. The obtained surfaces were characterized by Scanning ... -
SEM, EDS, and XPS characterization of coatings obtained on titanium during AC plasma electrolytic process enriched in magnesium
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Raaen, Steinar; Matysek, Dalibor; Dudek, Lukasz; Pietrzak, Kornel (Journal article; Peer reviewed, 2018)Plasma Electrolytic Oxidation (PEO) known also as Micro Arc Oxidation (MAO) process is widely used to fabricate porous coatings on titanium and its alloys mainly in water- and acid-based solutions to different applications, ... -
SEM/EDX, XPS, corrosion and surface roughness characterization of AISI 316L SS after electrochemical treatment in concentrated HNO3
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Raaen, Steinar; Valicek, Jan (Journal article; Peer reviewed, 2015)In the paper there is described the AISI 316L stainless steel surface obtained after electrochemical treatment in concentrated HNO3. It was characterized by roughness parameters, corrosion protection behaviour and chemical ... -
XPS and GDOES characterization of porous coating enriched with copper and calcium obtained on tantalum via plasma electrolytic oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Chapon, Patrick; Raaen, Steinar; Sandim, Hugo Ricardo Zschommler (Peer reviewed; Journal article, 2016)XPS and GDOES characterizations of porous coatings on tantalum after Plasma Electrolytic Oxidation (PEO) at 450 V for 3 minutes in electrolyte containing concentrated (85%) phosphoric acid with calcium nitrate and copper ...