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    Wyświetlanie 1-3 z 3
    Tytuł:
    Correlation between Microstructure and Electrochemical Properties of Al-Si Alloys
    Autorzy:
    Minciuna, Mirabela G.
    Vizureanu, Petrica
    Jeż, Bartłomiej
    Sandu, Andrei Victor
    Nabiałek, Marcin
    Achitei, Dragos C.
    Powiązania:
    https://bibliotekanauki.pl/articles/2134104.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium alloys
    microstructure
    X-ray diffraction
    corrosion
    Evans diagrams
    Opis:
    The composition and structural modification of aluminium alloys influence their strength, tribological properties and structural stability. The phase composition of the structure as well as the characteristics of the elementary cell of each identified phase was established by X-ray diffraction, and the main objective was to determine the compositional phases, microstructure and microcomposition of the alloy. Based on the cyclic voltammograms it can be said that on the OCP interval (+1.5 V… -1.1 V), after the breakthrough potential is an intensification of the anodic process by the pronounced increase of the current density, in these conditions the Al-Si alloy has low values which means that it has a better corrosion resistance.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 1067--1070
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Aspects Concerning Titanium Coverage with Hydroxyapatite
    Autorzy:
    Perju, Manuela-Cristina
    Nejneru, Carmen
    Vizureanu, Petrica
    Aelenei, Andra-Adorata
    Sandu, Andrei Victor
    Sachelarie, Liliana
    Nabiałek, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/2106580.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hydroxyapatite
    monetite
    electrochemical deposition
    biomimetic deposition
    FTIR
    SEM
    Opis:
    Generally, the metallic implants do not exhibit any bio-integration properties in contact with bone tissues. To improve the interfacial properties of metallic implants in contact with bone, the coatings with thin biocompatible films are used. Two methods to coating titanium implants with hydroxyapatite are described. The first is a two phase method, where by cathodic polarization is deposed a monetite film followed by an alkaline treatment when the monetite is converted to hydroxyapatite. The second method is a biomimetic deposition on an alkaline activate titanium surface, using a five time more concentrated simulated body fluid (5xSBF). After deposition this samples was drying at 120℃ and was sintered at 700℃ for three hours. Optical microscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray (EDX) were used to characterize structure, morphology and compositions of the deposed films. In this study, electrochemical deposition and biomimetic deposition of hydroxyapatite are compared.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 2; 521--527
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Naoh Molar Concentration on Microstructure and Compressive Strength of Dolomite/Fly Ash-Based Geopolymers
    Autorzy:
    Azimi, Emy Aizat
    Salleh, Mohd M. A. A.
    Abdullah, Mohd Mustafa Al Bakri
    Aziz, Ikmal Hakem A.
    Hussin, Kamarudin
    Chaiprapa, Jitrin
    Vizureanu, Petrica
    Yoriya, Sorachon
    Nabiałek, Marcin
    Wyslocki, Jerzy J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2125545.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dolomite/fly ash
    geopolymer
    NaOH concentration
    synchrotron
    micro-XRF
    Opis:
    Dolomite can be used as a source of aluminosilicate to produce geopolymers; however, this approach is limited by its low reactivity. This study analyzes the viability of producing geopolymers using dolomite/fly-ash with sodium silicate and NaOH solutions (at multiple concentrations) by determining the resultant geopolymers’ compressive strengths. The dolomite/fly-ash-based geopolymers at a NaOH concentration of ~22 M resulted in an optimum compressive strength of 46.38 MPa after being cured for 28 days, and the SEM and FTIR analyses confirmed the denser surface of the geopolymer matrix. The synchrotron micro-XRF analyses confirmed that the Ca concentration exceeded that of Si and Mg, leading to the formation of calcium silicate hydrate, which strengthens the resulting geopolymers.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 3; 993--998
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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