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    Wyświetlanie 1-9 z 9
    Tytuł:
    The Analysis of Filler Material Effect on Properties of Excavator Crawler Track Shoe after Welding Regeneration
    Autorzy:
    Gucwa, M.
    Winczek, J.
    Wieczorek, P.
    Mičian, M.
    Koňár, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049557.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardfacing
    carbides
    hardness
    wear
    covered electrode
    Opis:
    The application of hardfacing is one of the ways to restore the functional properties of worn elements. The possibility of using filler materials rich in chrome allows for better wear resistance than base materials used so far. The paper presents the results of research on the use of 3 different grades of covered electrodes for the regeneration of worn track staves. The content of the carbon in the covered electrodes was from 0,5% to 7% and the chromium from 5% to 33%. The microscopic and hardness tests revealed large differences in the structure and properties of the welds. The differences in the hardness of the welds between the materials used were up to 150 HV units. The difference in wear resistance, in the ASTM G65 test, between the best and worst materials was almost 12 times big.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 31-36
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrochemical Method of Copper Powder Synthesis on Rotating Electrode in the Presence of Surfactants
    Autorzy:
    Wojtaszek, K.
    Cebula, F.
    Partyka, B.
    Deszcz, P.
    Włoch, G.
    Socha, R. P.
    Woźny, K.
    Żabiński, Piotr
    Wojnicki, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2203711.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper powder
    electrochemical synthesis
    rotating electrode
    ethylene glycol
    Opis:
    This paper presents a method of synthesizing copper powders by electrochemical method with the use of a rotating working electrode. The influence of the rotation speed of the working electrode, the current density, the concentration of copper ions, and the addition of ethylene glycol on the shape, size, and size distribution of the obtained powders were investigated. Properties of the synthesized powders were characterized by scanning electron microscopy (SEM) and X-ray powder diffractometry (XRD). It has been shown that it is possible to obtain copper powders with a size of 1 µm by an electrochemical method using the rotary cathode, in sulphate bath with addition of ethylene glycol as a surfactant. Increasing current density causes a decrease in the average size of the obtained powder particles. The addition of 2.5% of ethylene glycol prevents the formation of dendritic powders. The change in the concentration of copper ions in the range from 0.01 to 0.15 mol/dm3 in the electrolyte did not show any significant effect on the size of obtained particles. However, higher concentrations of copper limiting the presence of dendritic-shape particles. Changing the speed of rotation of the electrode affects both the size and the shape of synthesized copper powder. For the rotational speed of the electrode of 115 rpm, the obtained powders have a size distribution in the range of 0-3 µm and an average particle size of 1 µm. The particles had a polygonal shape with an agglomeration tendency.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 375--386
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon Nanotubes Counter Electrode for Dye-Sensitized Solar Cells Application
    Autorzy:
    Drygała, A.
    Dobrzański, L. A.
    Szindler, M.
    Prokopiuk vel Prokopowicz, M.
    Pawlyta, M.
    Lukaszowicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/352593.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dye-sensitized solar cells
    counter electrode
    carbon nanotubes
    TEM
    Opis:
    The influence of the carbon nanotubes counter electrode deposited on the FTO glass substrates on the structure and optoelectrical properties of dye-sensitized solar cells counter electrode (CE) was analysed. Carbon materials have been applied in DSSC s in order to produce low-cost solar cells with reasonable efficiency. Platinum is a preferred material for the counter electrode because of its high conductivity and catalytic activity. However, the costs of manufacturing of the platinum counter electrode limit its use to large-scale applications in solar cells. This paper presents the results of examining the structure and properties of the studied layers, defining optical properties of conductive layers and electrical properties of dye-sensitized solar cells manufactured with the use of carbon nanotubes. Such counter electrodes are promising for the future fabrication of stable, low-cost and effective dye-sensitized solar cells.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 803-806
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study on the Durability of Dimensionally Stable Electrode in High-Rate Electroplating Process Condition Using Accelerated Life Test
    Autorzy:
    Park, Sung Cheol
    Jung, Yeon Jae
    Koo, Seokbon
    Lee, Kee-Ahn
    Son, Seong Ho
    Powiązania:
    https://bibliotekanauki.pl/articles/2049186.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    durability
    prediction
    dimensionally stable electrode
    accelerated life test
    failure mechanism
    Opis:
    In order to the long-term stability of DSE for electroplating process, the lifetime equations were calculated from the results of the accelerated life testing, and the lifetime of DSE was predicted. The nano-embossing pre-treatment led to 2.65 times in the lifetime of DSE. The degradation mechanism of DSE with a thick metal oxide layer for applied highly current density process condition was identified. The improvement of durability of DSE seems to be closely related to adhesion between titanium plate and mixed metal oxide layer.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 675-678
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Carbon Nanomaterials Application as a Counter Electrode for Dye-Sensitized Solar Cells
    Autorzy:
    Dobrzański, A.
    Prokopiuk vel Prokopowicz, M.
    Drygała, A.
    Wierzbicka, A.
    Lukaszkowicz, K.
    Szindler, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/352043.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dye-sensitized solar cell
    carbon nanomaterials
    counter electrode
    nanocrystalline photovoltaic cells
    Opis:
    The paper presents the results of the structure investigation of a counter electrode in dye-sensitized solar cells using the carbon nanomaterials. Solar cells were fabricated on the glass with transparent conductive oxide TCO (10Ω/sq). Nanocrystalline titania based photoanode was prepared by spreading TiO2 paste onto TCO glass and subsequently annealed at 450°C for at least 30 min to convert anatase phase and make an interparticle network. After then the nanostructured titania films was immersed into an ethanolic solution of the ruthenium-based dye. As a counter electrodes of dye-sensitized solar cells composite films of carbon nanomaterials and polystyrene sulfonate doped poly (3,4-ethylenedioxythiophene) PEDOT-PSS (Sigma-Aldrich) were deposited onto TCO substrates. Because carbon nanoelements and titanium oxide consist of nano-metric structural units to determine the properties of the cells and their parameters several surface sensitive techniques and methods, i.e. Raman spectroscopy, Scanning Electron Microscopy (SEM), High-Resolution Transmission Electron Microscopy (HRTEM), and electric properties of conductive layers were used.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 27-32
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Direct Energy Deposition of Mo Powder Prepared by Electrode Induction Melting Gas Atomization
    Autorzy:
    Roh, Goo-Won
    Park, Eun-Soo
    Moon, Jaeyun
    Lee, Hojun
    Byun, Jongmin
    Powiązania:
    https://bibliotekanauki.pl/articles/2049331.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    molybdenum powder
    electrode induction melting gas atomization
    direct energy deposition
    porosity
    hardness
    Opis:
    Molybdenum (Mo) is used to form a barrier layer for metal wiring in displays or semiconductor devices. Recently, researches have been continuously attempted to fabricate Mo sputtering targets through additive manufacturing. In this study, spherical Mo powders with an average particle size of about 37 um were manufactured by electrode induction melting gas atomization. Subsequently, Mo layer with a thickness of 0.25 mm was formed by direct energy deposition in which the scan speed was set as a variable. According to the change of the scan speed, pores or cracks were found in the Mo deposition layer. Mo layer deposited with scan speed of 600 mm/min has the hardness value of 324 Hv with a porosity of approximately 2%. We demonstrated that Mo layers with higher relative density and hardness can be formed with less effort through direct energy deposition compared to the conventional powder metallurgy.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 795-798
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic Mode of Copper Recovery from the Post-Processing Slags
    Autorzy:
    Wołczyński, W.
    Bydałek, A. W.
    Migas, P.
    Tarasek, A.
    Najman, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/352769.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    post-processing slag
    complex reagent
    copper recovery
    arc furnace
    rotating tilted electrode
    Opis:
    The post-processing slags containing about 0.8 wt.% of copper were subjected to the treatment of a complex reagent. The chemical composition of the complex reagent has been elaborated and patented in frame of the Grant No. PBS3/A5/45/2015. The slags had an industrial origin and were delivered by the Smelter and Refinery Plant, Głogów, as a product of the direct-to-blister technology performed in the flash furnace assisted by the arc furnace. An agglomeration of copper droplets suspended in the liquid slag, their coagulation, and deposition on the bottom of furnace were observed after the treatment this post-processing slag by the mentioned reagent. The treatment of the post-processing slags by the complex reagent was performed in the arc furnace equipped with some additional electrodes situated at the furnace bottom (additional, in comparison with the arc furnace usually applied in the Smelter and Refinery Plant, Głogów). The behaviour of the copper droplets in the liquid slag within the competition between buoyancy force and gravity was studied from the viewpoint of the required deposition of coagulated copper droplets. The applied complex reagent improves sufficiently the surface free energy of the copper droplets. In the result, the mechanical equilibrium between coagulated copper droplets and surrounding liquid slag is properly modified. Eventually, sufficiently large copper droplets are subjected to a settlement on the furnace bottom according to the requirements. The agglomeration and coagulation of the copper droplets were significantly improved by an optimized tilting of the upper electrodes and even by their rotation. Moreover, the settlement was substantially facilitated and improved by the employment of both upper and lower system of electrodes with the simultaneous substitution of the variable current by the direct current.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1923-1930
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrochemical Properties of Flexible Anode with SnO2 Nanopowder for Sodium-Ion Batteries
    Autorzy:
    Kim, Huihun
    Sadan, Milan K.
    Kim, Changhyeon
    Choi, Ga-In
    Seong, Minjun
    Cho, Kwon-Koo
    Kim, Ki-Won
    Ahn, Jou-Hyeon
    Ahn, Hyo-Jun
    Powiązania:
    https://bibliotekanauki.pl/articles/2049149.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    word
    sodium-ion batteries
    SnO2 anode
    flexible electrode
    nano SnO2 particles
    ether based electrolyte
    Opis:
    Sodium-ion batteries (SiBs) have attracted substantial interest as an alternative to lithium-ion batteries because of the low cost. There have been many studies on the development of new anode materials that could react with sodium by conversion mechanism. SnO2 is a promising candidate due to its low cost and high theoretical capacity. However, SnO2 has the same problem as other anodes during the conversion reaction, i.e., the volume of the anode repeatedly expands and contracts by cycling. Herein, anode is composed of carbon nanofiber embedded with SnO2 nanopowder. The resultant electrode showed improvement of cyclability. The optimized SnO2 electrode showed high capacity of 1275 mAh g-1 at a current density of 50 mA g-1. The high conductivity of the optimized electrode resulted in superior electrochemical performance.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 4; 931-934
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the Underpotential Deposition of Cadmium on Copper
    Analiza procesu podpotencjałowego osadzania kadmu na miedzi
    Autorzy:
    Kowalik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/353798.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    study
    process of deposition of cadmium on polycrystalline copper electrode
    badania
    proces podpotencjałowego osadzania kadmu na polikrystalicznej elektrodzie miedzianej
    Opis:
    In this study the process of deposition of cadmium on polycrystalline copper electrode in sulfate solution was investigated. The process of underpotential and bulk deposition was analyzed by classical electrochemical method: cyclic voltammetry(CV), anodic stripping voltammetry(ASV) and electrochemical quartz crystal microbalance(EQCM). The obtained results were compared with electrochemical impedance spectroscopy(EIS) measurements. CV, EQCM and EIS results suggest that the UPD of cadmium starts below potential −0.4 V vs Ag/AgCl. Additionally the stripping analysis indicates the formation of cadmium monolayer with different density of deposited atoms depending on the applied potential. The transition from UPD to bulk deposition occurs below potential −0,7 V.
    Przeprowadzono badania dotyczące procesu podpotencjałowego osadzania kadmu na polikrystalicznej elektrodzie miedzianej w roztworach siarczanowych. Zjawiska podpotencjałowego oraz nadpotencjałowego osadzania były badane z wykorzystaniem klasycznych metod elektrochemicznych: cyklicznej woltamperometrii, anodowej woltamperometrii inwersyjnej i elektrochemicznej mikrowagi kwarcowej. Otrzymane rezultaty były porównane z wynikami otrzymanymi podczas badań za pomocą elektrochemicznej impedancji spektroskopowej. Na podstawie wyników zauważono, że proces podpotencjałowego osadzania kadmu na miedzi zaczyna się od potencjału −0.4 V względem elektrody Ag/AgCl. Ponadto anodowa woltamperometria inwersyjna wskazuje, że w zależności od stosowanego potencjału zmienia się gęstość upakowania atomów kadmu na miedzi w zakresie od −0.4 do −0.7 V względem elektrody Ag/AgCl. Proces nadpotencjałowego osadzania kadmu rozpoczyna się poniżej potencjału −0.7 V względem elektrody Ag/AgCl
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3A; 1629-1632
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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