Now showing items 1-13 of 13

    • Comparison of the Efficiency of Three Types of Solar Collectors 

      Mocanu, Cătălin Bogdan; Panait, Tănase; Teodoru, Alexandrina; Tasma, Daniela (Universitatea "Dunărea de Jos" din Galați, 2012)
      Solar energy is one of the most abundant resources energy available in the world. Solar collectors have evolved in the last decades, but still they haven’t reached very high efficiencies. The collector efficiency is ...
    • Research Regarding the Possibility of Obtaining Nitinol by Powder Metallurgy 

      Potecaşu, Octavian; Potecaşu, Florentina; Alexandru, Petrică; Braz Fernandes, Francesco Manuel; Cordeiro Silva, Rui Jorge; Figueiredo Pereira Das Neves, Filipe Carlos (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      In the paper the obtaining of nitinol by pressing and sintering of a mixture of nickel and titanium powders is presented. The fabrication of NiTi alloys by powder metallurgy allows avoiding the usual problems related to ...
    • Influence of Niobium as Microalloying element in 3%Si Steel grade for Electrical Industry 

      Doniga, Ana (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The paper presents the results of the laboratory research on the chemical composition and crystallographic texture in 3% Si steels and their influence on the level of magnetic losses in the final sheet. The magnetic ...
    • Energetic and Exergetic Efficiencies of Biomass Gasification Processes 

      Tasma, Daniela; Panait, Tănase; Teodoru, Alexandrina; Rolea, Georgiana G. (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      A promising way to use biomass for the production of heat, electricity and other biofuels is through biomass gasification. In the gasification process, the chemical energy of the solid fuel is converted into the chemical ...
    • Evaluation of the Sonic System Efficiency for Raw Water Treatment 

      Cîrnu, Carmen; Bordei, Marian; Ciurea, Aurel (Universitatea "Dunărea de Jos' din Galaţi, 2012)
      Water pollution is defined as the change in the water composition that is harmful to human health, unsuitable for economic use or reactive and that can cause damage to the aquatic flora and fauna. In the appreciation of ...
    • Nanocomposite Coatings Obtained by Electro-Co-Deposition of Inert Particles with Cobalt-a Review 

      Şorcaru, Florentina Simona; Benea, Lidia (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The paper focuses on review investigations of electrodeposition processes of metallic coatings containing dispersed nanosized particles. The nanosized particles, suspended in the electrolyte by agitation and/or use of ...
    • Thermal Decomposition of Hafnium Ethoxide-Mollecular Precursor for Hafnia Dielectric Thin Films 

      Vâlcu (Herbei), Elena Emanuela; Mușat, Viorica; Leedham, Timothy (Universitatea "Dunărea de Jos" din Galați, 2012)
      The HfO2 thin-film is a very promising gate dielectric material for last generation transistors. The paper presents the thermal decomposition of hafnium ethoxide used as molecular precursor for obtaining hafnia thin ...
    • Modification of Surface Properties by Laser Cladding with Ni-Cr-B-Fe-Al Alloy 

      Boiciuc, Simona; Spânu, Constantin (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The paper is focused on modification of surfaces properties by laser cladding. To follow the corrosion behavior in different media of laser cladding layers made of nickel based alloy Ni - Cr - B - Fe - Al. It was studied ...
    • Evolution of Copper Microstructure Subjected to Equal Channel Angular Pressing 

      Gurău, Carmela; Gurau, Gheorghe (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      This paper aims to study bulk severe plastic deformation processes capable to produce ultrafine grain and also nanostructured 3D materials, interesting for processing in current industry. Samples of copper alloy were ...
    • Increase of Converter Life by Own Slag Coating 

      Munteanu, Viorel; Drăgan, Viorel; Zorlescu, Dan (Universitatea "Dunărea de Jos" din Galați, 2012)
      This paper presents a method for the improvement of the lining life of the BOF converter by slag coating, under nitrogen pressure. Own slag coating of converter lining is put in practice after steel tapping. Dolomite ...
    • Electrochemical Behavior of Zinc Layers Passivated in Phosphate Solutions 

      Radu, Tamara; Ciocan, Anişoara (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Phosphate conversion coatings are used on the galvanized steel. By forming a thin protective film on the surface of the steels this treatment enhances corrosion resistance. This paper presents studies on phosphate ...
    • The Consequence of Heavy Metals Impact on Primary Teeth 

      Zmarandache, Diana Daniela Daciana; Stanciu, Ioana-Andreea; Luca, Rodica; Farcaşiu, Cătălina (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Since the metals deposited in the teeth during formation and mineralization processes are to a large extent retained, human teeth receive a considerable attention as indicators of heavy metal exposure. The objective of ...
    • Corrosion of Composite Ferro-Niobium Layers in Cobalt Matrix 

      Balint, Lucica; Radu, Tamara; Balint, Simion Ioan (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      The ferro-niobium composite layers in cobalt matrix were obtained by cathode depositing from electrolyte solutions on steel base. The electrolyte included in its composition cobalt sulphate and cobalt chloride, boric ...