Căutare 1993 -2018 după Data publicării
Afișează articolele 301-320 of 552
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Evaluation of the Sonic System Efficiency for Raw Water Treatment
(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 ... -
Evolution of Copper Microstructure Subjected to Equal Channel Angular Pressing
(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 ... -
Electrochemical Behavior of Zinc Layers Passivated in Phosphate Solutions
(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 ... -
Energetic and Exergetic Efficiencies of Biomass Gasification Processes
(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 ... -
Comparison of the Efficiency of Three Types of Solar Collectors
(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 ... -
Influence of Niobium as Microalloying element in 3%Si Steel grade for Electrical Industry
(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 ... -
Research Regarding the Possibility of Obtaining Nitinol by Powder Metallurgy
(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 ... -
Corrosion of Composite Ferro-Niobium Layers in Cobalt Matrix
(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 ... -
Assessment of Blast Furnace slag Transformation Into value Added by-Products on Basis on Knowledge of Slag Characteristics
(Universitatea "Dunărea de Jos" din Galați, 2012)Slags are the main by-products generated during iron and crude steel production and the steel industry is committed to increasing and improving their recycling. Today the quantity of slag produced and its utilization are ... -
Synthesis and Characterisation of Ag/SnO2/Clay Nanocomposites with Potential Application as Photocatalysts
(Universitatea "Dunărea de Jos" din Galați, 2012)This work reported a novel synthesis and characterization of Ag/SnO2/clay nanocomposites. The obtained materials were characterized using techniques such as X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy, ... -
Some Aspects Regarding the Influence of Tribologycal Factors on the Superficial Layers of Steels Treated with Plasma Nitriding
(Universitatea "Dunărea de Jos" din Galați, 2012)Some 38MoCrAl09 (SAE 4038) steel grade samples were subjected to plasma nitriding treatment regimes. The structural and diffractometric aspects of the superficial layers of the steel are studied after the wear tests by ... -
Choosing and Using Rationally the Thermic Processed Steels
(Universitatea "Dunărea de Jos" din Galați, 2012)On a global scale one can notice a constant preoccupation for a rational choosing and using of the materials on the whole and, especially of the steels with the main objective the increase of the machines’, equipment’ ... -
Asphalt Pavement and Energy Collection
(Universitatea "Dunărea de Jos' din Galați, 2012)Romania, as an EU member state is bind to appraise and disseminate accurate and updated information about quantities, types, sources, production, transformation and consumption of energy in order to monitor the impact ... -
Augmented Reality-Applid Informatics Technology to products Maintenance, Repair and Servicing
(Universitatea "Dunărea de Jos" din Galați, 2012)Augmented Reality (AR) enhances a user's perception of the real world by enhancing it with specific objects that are over-imposed to the real objects. The virtual objects display information that the user may use. The ... -
Mathematical Modeling of the Heat Treatment Process Applied to Alloy Al-Zn-Mg-Cu-4.5% Zn, Used in Aeronautics
(Universitatea "Dunărea de Jos" din Galați, 2012)This paper presents mathematical modeling based on the regression analysis method by active experiment of a thermal treatment process applied to an alloy belonging to Al-Zn system, which finds application in aeronautics. Using ... -
Low Potential Heat Recovery Using Heat Pumps
(Universitatea "Dunărea de Jos" din Galați, 2012)This paper presents a study on the possibility of recovering low thermal potential heat from the cooling technological water of industrial processes. The analysed solution consists in the use of a heat pump which would ... -
Copper Plating Corrosion Study in Certain Environments
(Universitatea "Dunărea de Jos" din Galați, 2013)Copper plating was performed on nickel substrate by means of the potentiostatic electrodeposition method from a sulphate electrolyte solution. The copper coatings morphology was studied by means of the optical and ... -
Reducing the Zinc Emissions by Upgrading of Steel Scraps Quality
(Universitatea 'Dunărea de jos" din Galați, 2013)The steel production is one of the major sources of heavy metals emissions to the environment. There are several possibilities for prevention and minimization of these pollutants. Emission reduction measures focus on ... -
Setting the Optimum Angle of Solar Collectors Settlement
(Universitatea "Dunărea de Jos" din Galați, 2013)The performance of any solar energy system depends very much on the availability of solar radiation and the orientation of solar collectors. Solar collectors need to be inclined at the optimum angle to maximize the ... -
Improvement of Properties of Heavy Plates by Secondary Steelmaking Technologies and Rolling Conditions
(Universitatea "Dunărea de Jos" din Galați, 2013)In order to obtain the mechanical and technological characteristics required for controlled rolled plates it is necessary to realize a very low content of sulphur by desulphurized mixtures using CaO-Al2O3-CaF2 and injection ...
