Afișează articolele 21-40 of 3677

    • Aspects of Materials Decay Under Chemical Attack from the Leachate Treatment Plant of the Tirighina Waste Landfill 

      Neagu (Pîrvu), Doinița; Benea, Lidia; Dănăilă, Eliza (Universitatea "Dunărea de Jos" din Galați, 2014)
      Human society faces a number of major problems among which the increasingly negative consequences of environmental pollution. The high uses rate of the natural resources and the large amount of waste generated tend to ...
    • Antimicrobial Properties of Semiconductive Oxide Nanoparticles. From fundamental to Application 

      Ibănescu (Bușilă), Mariana; Tutunaru, Dana; Mușat, Viorica (Universitatea "Dunarea de Jos" din Galați, 2014)
      A problem of modern society is the spread of diseases worldwide. Infection control and maintaining a high level of hygiene by applying antimicrobial coatings (including medical products, packaging materials, membrane ...
    • Studies and Research on Treatment of Titanium Alloys 

      Dima, Ovidiu; Alexandru, Petrică; Gurău, Gheorghe; Vasilescu, Vlad Gabriel; Vasilescu, Elisabeta (Universitatea "Dunărea de Jos" din Galați, 2014)
      Titanium and its alloys have an extended use due to special properties. The paper highlights the TiZr alloy intended to manufacture prostheses, the influence of plastic deformation on the properties and structure. Applied ...
    • Structuras of the Eutectoid Zn-Al Alloy Obtained by Directed Solidification 

      Agapie, Mirela; Varga, Béla (Universitatea "Dunărea de Jos" din Galați, 2014)
      This work analyses the structure of the eutectoid Zn-Al based alloy directionally solidified, with cooling rates ranging between 8.5-0.4 oC/sec. During cooling, the temperature gradient in the liquidus zone, respectively ...
    • Residual Stress and Tribology Behaviour of TiCx Coating Deposited by NPCVD Method 

      Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2014)
      In this paper, thin TiCx films were coated by chemical vapour deposition method, and various duty cycles were carried out in order to observe the influence of this parameter on residual stress and tribology behaviours. ...
    • The Influence of Different Coatings on the Grafhite Degeneration in the Superficial Layer of Iron Castings 

      Anca, Denisa Elena; Panciu, Elena; Chișamera, Mihai (Universitatea "Dunărea de Jos" din Galați, 2014)
      The main objective of this experimenal reserch is to investigate new possibilities for reducing the graphite degeneration phenomenon in the superficial layer of iron castings. For the experiment, a spheroidal graphite ...
    • Wear Behavior of Carburizing on Powder Metallurgy Alloys 

      Marin, Mihaela; Potecașu, Florentina; Alexandru, Petrică; Potecașu, Octavian; Drugescu, Elena (Universitatea "Dunărea de Jos" din Galați, 2014)
      In this paper is studied the influence of wear behavior of carburizing in fluidized-bed on sintered alloys produced by powder metallurgy route. In powder metallurgy, carburization is a thermochemically treatment that ...
    • Study Related to improve Performance of a Neutralizing Gas Dynamics System 

      Bălan, Vasile; Bordei, Marian (Universitatea "Dunărea de Jos" din Galați, 2014)
      Worldwide, the series of attacks "with bomb" are the most common, accounting for over 80% of terrorist attacks. The many constructive solutions of Improvised Explosive Devices (I.E.D), would require for defusing sequence ...
    • Improving Biocompatibility of Co-Cr Alloy Used in Dentistry by Surface Modification with Electrochemical methods-Corrosion of Untreated Co-Cr Alloy in Solution with Different pH 

      Dănăilă, Eliza; Bounegru, Iulian; Benea, Lidia; Chiriac, Alexandru (Universitatea 'Dunărea de Jos" din Galați, 2014)
      The use of metals and alloys in dentistry has seen remarkable progress due to the deep research on their biocompatibility or the application of advanced technologies to improve surface properties by controlling ...
    • 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 ...
    • Corrosion Behavior of Zinc Alloy Layers 

      Radu, Tamara; Ciocan, Anisoara; Istrate, Gina Genoveva (Universitatea "Dunărea de Jos" din Galați, 2014)
      The alloying of zinc with some additional elements in specific quantities could be reliably used in the hot-dip coating process. These elements conferr substantially improved performance to the end-product specially by ...
    • Resesrches on the Production of Copper-Based Composites by Powder Metallurgy Methods 

      Boiciuc, Simona; Alexandru, Petrică (Universitatea "Dunărea de Jos" din Galați, 2014)
      The article presents how to obtain copper matrix composite with alloy particles of NiCrBFeAl as complementary phase. The samples were obtained by powder metallurgy methods using different percentages of the additional ...
    • Effects Exerted by Slag Carried over from Converter in the Ladle on the Aluminum Assimilation 

      Niță, Petre Stelian (Universitatea "Dunărea de Jos" din Galați, 2014)
      In the present paper are shown aspects of the influence exerted by the some less controlled parameters of BOF steelmaking, mainly of slag characteristics at tapping. Following the necessities to control the steel ...
    • Behavior of Cold Rolling Emulsions in the Obtaining Process of Steel Strips 

      Radu, Tamara; Ciocan, Anișoara (Universitatea "Dunărea de Jos" din Galați, 2014)
      The research was focused on determining an optimum rolling emulsion to be used on a cold rolling mill from Galfinband Galati Romania. In this plant are obtained steel strips with the thickness of 0.7-0.8 mm. The main ...
    • Particularities of the Management System for Phone Mobile Waste in Romania 

      Ciocan, Anișoara (Universitatea "dunărea de Jos" din Galați, 2014)
      The main objective of this paper is to characterize the management system for mobile phones in Romania. The dimension of cell phone waste flow and the problems related to the collecting and recycling of this waste were ...
    • Elastic Modulus of Coatings by Pendulum Impact Test 

      Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2014)
      The pendulum impact scratch device with high precision system in measuring normal and tangential forces during scratching has been used to study elastic modulus of coatings. The criterion for evaluation of elastic modulus ...
    • Characterization on the Red Mud Resulted from the Alumina Bayer Process Production for the Future Use in Geopolymers Synthesis 

      Spătaru (Severin), Ilenuța; Vlad, Maria; Gheorghieș, Constantin; Movileanu, Gelu (Universitatea "Dunărea de Jos" din Galați, 2014)
      This paper presents the results of analyses on the chemical, structural and morphological processing of bauxite red mud resulting from alkaline wet Bayer technology. The characterization of the material considered as ...
    • Tribocorrosion-insight Into Material Degradation in Specific Environments 

      Bașa, Sorin-Bogdan; Benea, Lidia (Universitatea "Dunărea de Jos" din Galați, 2014)
      Tribocorrosion is an irreversible surface degradation mechanism of a metallic and/or non-metallic material as a result of its physicochemical and mechanical interactions during relative motion (friction, sliding, impact, ...
    • Emphasizing the Toxicity of Heavy Metal ions on Plants: Monitoring with an Amino Acids Assay 

      Pintilie, Olga; Zaharia, Marius; Tudorachi, Lucia; Băncilă, Sabina; Drochioiu, Gabi; Sandu, Ion (Universitatea "Dunărea de Jos" din Galați, 2014)
      In order to emphasize modifications on living organisms resulted from interaction with heavy metals, we applied a simple, sensitive, quick, inexpensive and reproducible method. It evaluates modifications through determining ...
    • Siderurgy Slags Recovery in Building Industry 

      Bordei, Marian; Enăcache, Liviu; Dragomir, Ștefan (Universitatea "Dunărea de Jos" din Galați, 2014)
      During the metallurgical processes of iron and steel elaboration, besides the basic products, it results a serious of secondary products (wastes) in high quantities but with a high recycle – recovery potential, and their ...