Căutare 1993 -2018 după Titlu
Afișează articolele 178-197 of 552
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Generation, Morphology and Mineralogy of the Dust Particles from Off-Gas Blast Furnace
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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)
(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
(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
(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 ... -
Implications of Thermal and Thermo Chemical Treatments in Electrolytic Plasma on the Phasic Composition of Steels 40Cr10 and OLC 55
(Universitatea "Dunărea de Jos" din Galați, 2007)The X-ray diffraction researches allowed the identification of the phases present in the structure of steels 40Cr10 and OLC 55, treated thermally and thermal-chemically in electrolytic plasma and the calculation of ... -
Improved Hardness and Tribocorrosion Properties of Nickel Coatings By Co-Depositing ZrO2 Micro-Sized Dispersed Phase During Electroplating Process
(Universitatea "Dunărea de Jos" din Galați, 2006)The tribocorrosion properties of ZrO2 – nickel microstrucured composite coatings have been studied in the following conditions: -Solution: 0.5M K2SO4 -Tribo corrosimeter: pin on disc connected with electrochemical ... -
Improvement of Casting Technology by Using of Exothermic Feeder Head and Simulation the Solidification Alloy
(Universitatea "Dunărea de Jos" din Galați, 2012)This paper presents a simulation program use of feeders exothermic and insulating plates. High quality casting is considerably improved by using solidification simulation flow and cast. -
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 ... -
Improvement of Steel Sheet Corrosion Resistance by Thermic Coverage Method with Zinc-Aluminium Alloys
(Universitatea "Dunărea de Jos" din Galați, 2007)The paper presents the main physico-chemical characteristics (viscosity and superficial tension of zinc-aluminium liquid alloy in view of carry out protected layers on steel sheet with very good properties by thermal ... -
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
(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 ... -
Improving of Functional Parameters for Pressure Casting Machine with High Degree of Finishing
(Universitatea "Dunărea de Jos" din Galați, 2009)The paper presents a mathematic model of static and dynamic characteristics for casting machine. This machine has a hydraulic action for the casting chamber (her closing and introducing of molten alloy). This action is ...