Browsing NTNU Open by Author "Hryniewicz, Tadeusz"
Now showing items 1-18 of 18
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Characterisation of Calcium- and Phosphorus-Enriched Porous Coatings on CP Titanium Grade 2 Fabricated by Plasma Electrolytic Oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; Pietrzak, Kornel; Malorny, Winfried (Journal article; Peer reviewed, 2017)In the paper, Scanning Electron Microscopy (SEM), Energy-dispersive X-ray Spectroscopy (EDS), X-ray Photoelectron Spectroscopy (XPS), and Glow Discharge Optical Emission Spectroscopy (GDOES) analyses of calcium- and ... -
Characterisation of porous coatings formed on titanium under AC plasma electrolytic oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; Dudek, Lukasz; Pietrzak, Kornel; malorny, winfried; Ciuperca, Radion (Journal article; Peer reviewed, 2018)The Plasma Electrolytic Oxidation (PEO) process may be used to fabricate porous coatings on titanium. The ranges of voltages used in case of these plasma treatments are different. It has been found that for DC PEO processing ... -
Characterisation of porous coatings formed on titanium under DC plasma electrolytic oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; Dudek, Lukasz; Pietrzak, Kornel; malorny, winfried; Ciuperca, Radion (Journal article; Peer reviewed, 2018)Porous coatings on titanium may be obtained by AC or DC Plasma Electrolytic Oxidation (PEO) process. One has to point out that depending on the plasma treatment the ranges of voltages used are different. It has been found ... -
Characterization of Porous Phosphate Coatings Enriched with Calcium, Magnesium, Zinc and Copper Created on CP Titanium Grade 2 by Plasma Electrolytic Oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Kacalak, Wojciech; Tandecka, Katarzyna; Raaen, Steinar; Gaiaschi, Sofia; Chapon, Patrick; malorny, winfried; Matysek, Dalibor; Dudek, Lukasz; Pietrzak, Kornel (Journal article; Peer reviewed, 2018)In the paper, the effect of voltage increase (from 500 VDC up to 650 VDC) on the structure and chemical composition of the porous coating on titanium made by Plasma Electrolytic Oxidation is presented. Phosphates-based ... -
Characterization of Porous Phosphate Coatings Enriched with Magnesium or Zinc on CP Titanium Grade 2 under DC Plasma Electrolytic Oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; Pietrzak, Kornel; malorny, winfried; Fernandes, Joao Salvador (Journal article; Peer reviewed, 2018)The aim of the paper is to study and determine the effect of voltage increasing from 500 up to 650 VDC on chemical and electrochemical properties of the obtained porous coatings with plasma electrolytic oxidation (PEO) ... -
Cr/Fe ratio by XPS spectra of magnetoelectropolished AISI 316L SS fitted by Gaussian-Lorentzian shape lines
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Raaen, Steinar (Journal article; Peer reviewed, 2014)In the paper, the analyses of Fe2p3/2 and chromium Cr2p3/2 XPS spectra with fitting by symmetrical and asymmetrical line shapes, are presented. The calculations are performed on AISI 316L SS biomaterial after magnetoelec ... -
Development of Porous Coatings Enriched with Magnesium and Zinc Obtained by DC Plasma Electrolytic Oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; malorny, winfried; Matysek, Dalibor; Pietrzak, Kornel (Journal article; Peer reviewed, 2018)Coatings with developed surface stereometry, being based on a porous system, may be obtained by plasma electrolytic oxidation, PEO (micro arc oxidation, MAO). In this paper, we present novel porous coatings, which may be ... -
Fabrication and Characterisation of Porous Coatings Enriched with Copper on CP Titanium Grade 2 under Plasma Electrolytic Oxidation
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; Dudek, Lukasz; malorny, winfried (Journal article; Peer reviewed, 2019)In the present paper, coatings obtained on CP Titanium Grade 2 samples by Plasma Electrolytic Oxidation (PEO) in electrolyte containing concentrated phosphoric acid H3PO4 with copper nitrate Cu(NO3)2∙3H2O, are studied with ... -
High-current-density electropolishing (HDEP) of AISI 316L (EN 1.4404) stainless steel
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Rzadkiewicz, Slawomir; Raaen, Steinar (Journal article; Peer reviewed, 2015)The paper presents new XPS results of surface layers formed after electrochemical polishing of AISI 316L stainless steel at high current density (HDEP) of 1000 A/dm2 (EP1000) versus a standard electropolishing (EP50) process ... -
Metal Ions Supported Porous Coatings by Using AC Plasma Electrolytic Oxidation Processing
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Raaen, Steinar; Gaiaschi, Sofia; Chapon, Patrick; Matysek, Dalibor; Pietrzak, Kornel; Szymanska, Monika; Dudek, Łukasz (Peer reviewed; Journal article, 2020)Coatings enriched with zinc and copper as well as calcium or magnesium, fabricated on titanium substrate by Plasma Electrolytic Oxidation (PEO) under AC conditions (two cathodic voltages, i.e., −35 or −135 V, and anodic ... -
Novel Porous Phosphorus–Calcium–Magnesium Coatings on Titanium with Copper or Zinc Obtained by DC Plasma Electrolytic Oxidation: Fabrication and Characterization
Rokosz, Krzysztof; Hryniewicz, Tadeusz; Gaiaschi, Sofia; Chapon, Patrick; Raaen, Steinar; Matysek, Dalibor; Dudek, Lukasz; Pietrzak, Kornel (Journal article; Peer reviewed, 2018)In this paper, the characteristics of new porous coatings fabricated at three voltages in electrolytes based on H3PO4 with calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, and copper(II) nitrate trihydrate are ... -
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 ...