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    Wyświetlanie 1-3 z 3
    Tytuł:
    Influence of Semisolid and Strontium Addition on Dry Sliding Wear Behavior of Hypoeutectic Al-Si Alloy
    Autorzy:
    Anas, Noraz Man
    Zakaria, S. A.
    Anasyida, A. S.
    Mohamad, Hasmaliza
    Dhindaw, Brij Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/2203750.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypoeutectic Al-Si alloy
    semisolid
    cooling slope
    Sr
    wear resistance
    Opis:
    The study aims to investigate the effect of semisolid structure and strontium (Sr) addition on the wear behavior of hypoeutectic Al-Si alloy. Semisolid hypoeutectic Al-Si alloy was prepared using cooling slope casting with addition of 0 to 0.93 wt.% Sr. Microstructural study was done using an optical microscope. Vicker microhardness and pin on disc tribometer were used for microhardness and wear testing. When compared to conventional casting, the microhardness of the semisolid hypoeutectic Al-Si alloy improved by 9.8%. Sr addition at 0.43 wt.% resulted in a refined eutectic structure with a 17% increase in hardness over conventional casting. The globular structure α-Al formed during semisolid casting reduced porosity, and the addition of Sr refined the eutectic silicon into a fine fibrous structure that is tightly bound with the Al matrix. These are the primary factors that contribute to the high wear resistance in modified-Sr semisolid alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 307--317
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on stability of emulsions containing carotenoids
    Autorzy:
    Igielska-Kalwat, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/1038379.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    carotenoids
    particle size
    semisolid formulations
    stability studies
    Opis:
    Emulsions are commonly used to improve aesthetics but they may also be applied to deliver active ingredients. Recently, a group of pigments known as carotenoids has been added to emulsions as an active compound mainly due to their antioxidant properties. The stability of these formulations is a critical parameter for both, pharmaceutical and cosmetics industry. Therefore, in this study two analytical methods, multiple light scattering and laser diffraction, were tested to determine the stability of various emulsions containing carotenoids (β-carotene, lycopene, astaxanthin). Even small changes in stability of emulsions were determined very early. The results of both methods proved that the type of carotenoid used did not influence the emulsions' stability. The stability of emulsions depends mainly on the preparation methods and on the type of emulsifier applied.
    Źródło:
    Acta Biochimica Polonica; 2018, 65, 3; 455-463
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Modification of Al-6%Si By Semisolid Process
    Autorzy:
    Sarajan, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/353078.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties
    Al-6%Si Alloy
    stirring
    morphology
    semisolid process
    Opis:
    In this study by semisolid processing of Al-6%Si alloy, it has been found that small additions of Ti-6Al-4V shift the liquidus temperature up and the recalescence decreases. The nucleation event takes place at higher temperatures. Furthermore, the rate at which growth temperature increases is less than that of nucleation temperature and therefore more nuclei form with less potential for growth. In this processing refiner increases the α-Al percentage and reduces globule size. Improvement of mechanical property and microstructure characterization are the main advantages of this study.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1689-1696
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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