PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 8

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Study on Synthesis and Modification of Conical Ni Structures by One-Step Method
Skibińska K., Semeniuk S., Kutyła D., Kołczyk-Siedlecka K., Jędraczka A., Żabiński P.
Archives of Metallurgy and Materials
|
2021
|
Vol. 66, iss. 3
861--869
EN
In this work the conical Ni structures were obtained from an electrolyte containing NH4Cl as a crystal modifier. This process is called one-step method and allows to cover large areas with micro- and nanostructures during a single electrodeposition. Presence of NH4Cl promotes a vertical direction of structure growth in order to block a horizontal one. Additionally, this method does not require using chromic acid solution, which is dangerous for the environment. Due to the ferromagnetic properties of Ni, obtained coatings could be applied as magnetic devices. The influence of the parameters such as a preparation of copper substrate, a composition of electrolyte and electrodeposition conditions (time, the electrolyte temperature and current density) was investigated in this work.
2
Content available Influence of Magnetic Field on Electroless Metallization of 3D Prints by Copper and Nickel
Kołczyk-Siedlecka K., Skibińska K., Kutyła D., Kwiecińska A., Kowalik R., Żabiński P.
Archives of Metallurgy and Materials
|
2019
|
Vol. 64, iss. 1
17--22
EN
3D printing is a technology with possibilities related to the production of elements of any geometry, directly from a digital project. Elements made of plastic are metalized to give new properties such as conductivity or corrosion resistance. In this work, experimental work related to the electroless deposition of metallic coatings on plastics was carried out. For this purpose, the copper and nickel coatings were catalytically deposited on elements printed using hard-lightened resin. The effect of the metallization time on the properties of copper and nickel coatings was determined. In addition, the process of deposition metals in the magnetic field was analyzed with different direction of magnetic field to the surface of the samples. The coatings were analyzed by XRF, XRD method and morphology of surface was observed by scanning electron microscopy (SEM).
3
Content available Investigation of Two-Step Metallization Process of Plastic 3D Prints Fabricated by SLA Method
Kołczyk K., Zborowski W., Kutyła D., Kwiecińska A., Kowalik R., Żabiński P.
Archives of Metallurgy and Materials
|
2018
|
Vol. 63, iss. 2
1031--1036
EN
This paper presents the results of experiments on metallization of plastic elements produced using 3D printing technology from the light-hardened resins. The obtained coatings were bimetallic (Cu/Ni). The first step of metallization was the electroless deposition of copper. The second one was electrodeposition of nickel on the previously prepared copper substrate. The parameters of 3D prints preparation and metallization processes were deeply investigated. The etching of plastics substrates and duration of electroless metallization of 3D prints by copper were analyzed. In the next step the influence of nickel electrodeposition time was investigated. The coating were analyzed by XRD method and morphology of surface was analyzed by scanning electron microscopy (SEM). The thickness of coatings was calculated based on mass differences and measured by using optical microscopy method. The optimal parameters for both processes were specified.
4
Content available Electrocatalytical Properties of Palladium-Decorated Cobalt Coatings Obtained by Electrodeposition and Galvanic Displacment
Skibińska K., Kutyła D., Kołczyk K., Kwiecińska A., Kowalik R., Żabiński P.
Archives of Metallurgy and Materials
|
2018
|
Vol. 63, iss. 3
1517--1521
EN
This work presents the studies on the electrochemical process of thin palladium layers formation onto electrodeposited cobalt coatings. The suggested methodology consists of the preparation of thick and smooth cobalt substrate via galvanostatic electrodeposition. Cobalt coatings were prepared under different cathodic current density conditions from acidic bath containing cobalt sulphate and addition of boric acid. Obtained cobalt layers were analyzed by x-ray diffraction to determine their phase composition. Freshly prepared cobalt coatings were modificated by the galvanic displacement method in PdCl2 solution, to obtain smooth and compact Pd layer. The comparison of electrocatalytic properties of Co coatings with Co/Pd ones enabled to determine the influence of Palladium presence in cathodic deposits on the hydrogen evolution process.
5
Content available Separation of Ho3+ in Static Magnetic Field
Kołczyk K., Wojnicki M., Kutyła D., Kowalik R., Żabiński P., Cristofolini A.
Archives of Metallurgy and Materials
|
2016
|
Vol. 61, iss. 4
1919--1924
EN
The rare earths elements (REE) belong to the group of critical metals and they are achieving more and more interest due to their special properties. However, there occur some problems connected with their production. The most difficult phase is separation of REE. It includes a necessity to intensify currently applied processes and looking for new solutions. The present work introduces an idea to use differences in physical properties of the REE ions to get them separated. In the experimental part of the work some efforts were undertaken to analyse results presenting changes of holmium ions concentration under an influence of the magnetic field gradient. There was determined the gradient of magnetic field and concentration of Ho3+ ions depending on initial concentration of the solution and time. A simulation of changing the concentration of holmium ions in the solution under an influence of the magnetic field gradient was performed to compare the mathematical model with the obtained results.
6
Content available Electrochemical Deposition of Ruthenium and Cobalt-Ruthenium Alloys From Acidic Chloride Ions Containing Baths
Kutyła D., Kołczyk K., Kowalik R., Żabiński P.
Archives of Metallurgy and Materials
|
2016
|
Vol. 61, iss. 3
1567--1574
EN
The article presents results of tests on potentiostatic electrodeposition of ruthenium and Co-Ru alloys. The tests applying the method of cyclic voltammetry with the use of gold disk electrode (RDE) allowed to define a potentials range in which it is possible to obtain ruthenium and its alloys with cobalt from acid chloride electrolytes. The influence of electrodeposition parameters and the electrolyte composition on the composition, morphology and structure of the obtained deposits was determined. Co-Ru alloys underwent XRD tests, an analysis with the XRF method and observations using scanning electron microscopy (SEM).
7
Content available Electrochemical codeposition of molybdenum and selenium
Kowalik R., Kutyła D., Mech K., Wróbel M., Tokarski T., Żabiński P.
Metallurgy and Foundry Engineering
|
2015
|
Vol. 41, no. 1
7--16
EN
The electrodeposition of Mo-Se thin films from a sulfate solution containing Na2MoO4 and H2SeO3 was studied. The process of deposition was conducted under potentiostatic conditions on a copper electrode. The effect of potential value, pH, and time of deposition were examined. The deposits were characterized by X-ray diffraction, X-ray fluorescence, and scanning electron microscopy. The obtained results have shown the possibility of co-deposition of molybdenum and selenium with different stoichiometric ratios.
PL
Przeprowadzono badania dotyczące procesu elektrochemicznego osadzania molibdenu z selenem z roztworów siarczanowych zawierających Na2Mo4 i H2SeO3. Proces osadzania przeprowadzono w warunkach potencjostatycznych na elektrodach miedzianych. Zbadano wpływ potencjału, pH elektrolitu oraz długości czasu osadzania na jakość otrzymanych powłok. Otrzymane warstwy były badane z wykorzystaniem dyfrakcji rentgenowskiej, spektrofluorymetrii rentgenowskiej oraz skaningowego mikroskopu elektronowego. Wykazano możliwość otrzymania powłok o różnym stosunku molibdenu do selenu
8
Content available Electrowinning Of Tellurium From Acidic Solutions
Kowalik R., Kutyła D., Mech K., Tokarski T., Żabiński P.
Archives of Metallurgy and Materials
|
2015
|
Vol. 60, iss. 2A
591--596
EN
The process of electrochemical deposition of tellurium was studied. Preliminary researches embrace the voltammetry and microgravimetric measurements. According to the results the electrolysis of tellurium was conducted under potentiostatic conditions. There was no deposition of tellurium above potential −0.1 vs. Ag/AgCl electrode in 25°C. The process of deposition is observed in the range of potentials −0.1 to −0.3 V vs. Ag/AgCl. The presence of tellurium was confirmed by XRF and XRD. The obtained deposits were homogenous and compact. Below potential −0.3 V vs. Ag/AgCl the Faradaic efficiency of the tellurium deposition decreased due to reduction of Te to H2Te and hydrogen evolution.
PL
Przeprowadzono badania obejmujące możliwość otrzymywania telluru z roztworów kwaśnych metodą elektrochemiczną. Badania wstępne obejmowały analizę mechanizmu osadzania telluru z wykorzystaniem cyklicznej woltamperometrii oraz elektrochemicznej mikrowagi kwarcowej. Na podstawie otrzymanych wyników przeprowadzono proces elektrolizy w warunkach potencjostatycznych. W temperaturze 25°C powyżej potencjału −0.1 V względem elektrody chlorosrebrowej nie zachodzi proces osadzania telluru. W zakresie potencjałów od −0.1 do −0.3 V względem elektrody chlorosrebrowej następuje jego osadzanie na katodzie. Obecność tellury była potwierdzona metodami XRD i XRF. Osady otrzymane w omawianym zakresie parametrów charakteryzowały się zwartą i jednorodną budową. Poniżej potencjału −0.3 V względem elektrody chlorosrebrowej wydajność oraz szybkość procesu osadzania telluru ulegają obniżeniu w wyniku występowania reakcji konkurencyjnych: redukcji Te do H2Te oraz wydzielania wodoru.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.