Căutare 1993 -2018 după Titlu

Afișează articolele 171-190 of 552

    • Fabrication and Characterization of Cobalt/Iron Composite Coatings 

      Gheorghieș, Livia (Universitatea "Dunărea de Jos" din Galați, 2013)
      Cobalt/iron composite coatings are used in micro-equipments due to their high magnetic saturation values and Curie temperatures, as magnetic nanoparticles capable of killing cancer cells, for magnetic data storage and ...

    • Fabrication of Ultrafine Low Carbon Metallic Multilayer by Accumulative Roll Bonding 

      Gurău, Carmela; Gurău, Gheorghe; Gurău, Lidia; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The effect of grain refinements by Accumulative Roll Bonding (ARB) was investigated on low carbon steel. Optical microscopy (OM) and microhardness tests were used to check the phase changes and hardness before and after ...

    • Fatigue Degradation of Materials as a Tool for Damage Assessment 

      Silva, Filipe (Universitatea "Dunărea de Jos" din Galați, 2008)
      Damage assessment of components or systems is strongly related to the way components fail. Thus, an appropriate understanding of failure degradation of components is necessary. Furthermore, most of the failures are related ...

    • Fem Analysis of the Spur Gears Press-Rolling Proces 

      Marian, Ionuț; Sas-Boca, Monica; Rus, Luciana; Suciu, Ramona-Crina; Tintelecan, Marius; Noveanu, Dan; Nistor, Liviu (Universitatea "Dunărea de Jos" din Galați, 2013)
      This paper presents the FEM (finite element method) analysis of the pressingrolling process, a new method for obtaining spur gears. Using symmetries, the 3D geometrical model was created for tools and for the initial ...

    • Fuel Consumption Study for Auxiliary Engines that Equip an Oil Tanker 

      Lupchian, Mariana (Universitatea "Dunarea de Jos' din Galați, 2017)
      The paper deals with an oil tanker whose propulsion system with internal combustion engine during navigation was investigated. For a power plant with internal combustion engines we distinguish the subsystems: the internal ...

    • Fuel Economy at the Heat Treatment Furnaces of Steel Cast Pieces 

      Ivănescu, Lilica; Ivănescu, Alexandru; Ene, Antoaneta (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper presents a study made at the annealing furnaces for homogenization of cast pieces regarding the replacement of marsh gas with blast furnace gas, in a proportion of 100%. In this way an important economy of marsh ...

    • Funcţional Model of Savonius Type Vertical Axis Wind Turbine With Periodic Coupling of Adjacent Vertical Blades 

      Cazacu, Nelu; Lucaci, Cătălin Bogdan (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The field of HAWT (Horizontal Axis Wind Turbines) regarding the use of wind energy (WE) as a renewable energy source (RES) is well researched and the results are covering both the power range and efficiency. Deficiencies ...

    • Generation, Morphology and Mineralogy of the Dust Particles from Off-Gas Blast Furnace 

      Ciocan, Anișoara; Potecașu, Florentina; Ivancea, Liliana (Universitatea "Dunărea de Jos" din Galați, 2009)
      In order to elucidate the morphology and mineralogy of the dust from blast furnace, the fundamental aspects of its generation process were studied. A dust generated by the dry dedusting step of the cleaning process for ...

    • Geopolymers Obtained with Red Mud from Alumina Manufacturing 

      Severin (Spătaru), Ilenuța; Vlad, Maria (Universitatea "Dunărea de Jos" din Galați, 2014)
      Getting reusable aluminosilicate materials, based on the geopolymerization reaction mechanism of some physical and mechanical material particular, has been imposed in the recent years in building materials. This paper ...

    • Glow Discharge Optical Emission Spectrometry (GDOES), an Effectiveness Method for Characterizing Composition of Surfaces and Coatings 

      Munteanu, Daniel; Schreiner, Alexander (Universitatea "Dunărea de Jos" din Galați, 2008)
      Within the frame of this work, the technical procedures and real advantages of using Glow Discharge Optical Emission Spectroscopy (GDOES) for establishing depth concentration profiles of surfaces are presented. GDOES can ...

    • Grain Refinement in Aluminum Alloys by Acoustic Cavitation Phenomena 

      Moraru, Luminița (Universitatea "Dunărea de Jos" din Galați, 2007)
      In this article, ultrasonic method of transmitting forced vibrations to solidifying aluminum-alloy melts is presented. In the presence of well developed cavitation situations, a fine and homogeneous microstructure has ...

    • Granularly unbind Materials for Casting Composite Moulds 

      Mărginean, Ioan; Târcolea, Mihai; Mirea, Vasile; Cocolas, Sorin-Adrian (Universitatea "Dunărea de Jos" din Galați, 2007)
      This paper present some partial result based on this idea (of pollution prevention) the domain of making composite-casting moulds (in time of casting, solidifying, and alloy cooling). Casting process impose temporary or ...

    • Half-Finished Technology of Steels and Fatigue Strength 

      Palaghian, L.; Ciortan, S.; Baicean, S. (Universitatea "Dunărea de Jos" din Galați, 2008)
      The paper presents the bending fatigue testing for four steel brands. The test showed that the fatigue strength is decreasing with the increasing of both ingot size and the rolled sheet thickness. The fatigue strength ...

    • Hardened Aluminium with Discontinuous Copper Threads 

      Potecașu, octavian; Potecașu, Florentina; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper presents the influence of the quantity of discontinuous reinforced threads on the mechanical characteristics of some samples obtained through deformation from composite material with metallic matrix. As a raw ...

    • Hardened Aluminum with Oxide Particles 

      Potecașu, Florentina; Potecașu, Octavian; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2006)
      The paper presents the effect of size and dispersion degree of the particles of aluminum oxide, on structure, mechanical characteristics and phenomena that take place when heating at different temperatures for ...

    • Hardening of the Grey Cast Iron Through the Vibrating Electrode Method Using a WC Electrode and in Combination with Ti Electrode 

      Perju, Manuela Cristina; Nejneru, Carmen; Răileanu, Tudor; Axinte, Mihai; Hopulele, Ioan (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      There have been tested samples of grey cast iron, the hardening being made through WC coating through the vibrating electrode method with a layer, two layers and through double layers combined with Ti and TiC. Besides ...

    • Heavy Metal Ions Cu (II), Co (II) and Cr (III) bufunctionally Improved with Hydroxamic and Amidoxime Groups Chelating Ion Exchangers 

      Wenkert, R.; Moisa, S.; Tofan, L.; Păduraru, C. (Universitatea "Dunărea de Jos'' din Galați, 2009)
      Two new types of bifunctional chelating ion exchangers on the basis of ethylacrylate acrylonitrile: divinylbenzene copolymers with hydroxamic acid and amidoxime groups have been evaluated for Cu(II), Co(II) and Cr(III)ions ...

    • High-Dielectric Inorganic-Organic Hybrid thin Films for fie;ld Effect Transistors (FETFT) 

      Vâlcu (Herbei), Elena Emanuela; Mușat, Viorica; Oertel, Susanne; Jank, Michael (Universitatea "Dunărea de Jos" din Galați, 2013)
      The paper discusses the challenges to develop thin films transistors for flexible transparent electronics, displays etc. The sol-gel preparation of hybrid thin films based on dielectric oxides nanoparticles (SiO2 NPs, ...

    • Hydrodynamic Aspects on EAF's Smelt Metallic Mirror 

      Mustaţă, Ruxandra Ioana; Mustaţă, Costică T. (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      Using the Physical and Mathematical knowledge, a new approach to EAF bath’s hydrodynamic aspects is proposed to be developed in this paper. Experimental results and a mathematical equation package have been concluded ...

    • Hydrogen production by Steam reforming of Renewable Raw Materials 

      Matei, Vasile; Mihai, Oana; Jugaru, Traian; Movileanu, Daniela; Borcea, Anca; Matei, Dorina (Universitatea "Dunărea de Jos" din Galați, 2007)
      The paper is based on study of steam reforming of renewable raw materials (bioethanol, biomethane) in stainless steel fixed bed reactor. The β-alumina catalysts with nickel has been synthesized and tested supported. The ...