Căutare 1993 -2018 după Data publicării
Afișează articolele 281-300 of 552
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Neutralization of Hazardous Waste in Vitreous Mass of Glass
(Universitatea "Dunărea de Jos" din Galaţi, 2012)The paper presents studies concerning the neutralization of hazardous waste containing metal ions by embedding them in vitreous matrix which are chemically stable materials. The main analysed factors are: chemical ... -
The Dental Technology in Art Foundry
(Universitatea "Dunărea de Jos" din Galaţi, 2012)The paper presents results of a study undertaken to implement the dental casting technique of small parts characterized by extremely complex drawings of surfaces and thicknesses reduced specific objects. During the study ... -
Aluminum Foams with Closed Pores Obtained by Casting Techniques
(Universitatea 'Dunărea de Jos" din Galați, 2012)Techniques for the preparation of metallic foams, including casting, powder metallurgy and metallic deposition, have been reviewed. There is a present interest in the development of materials capable of plastic deforming ... -
Influence of Micro Glass Beads Added in PBT Matrix on the Mechanical Properties of Composites
(Universitatea "Dunărea de Jos" din Galaţi, 2012)This paper presents the influence of adding materials (micros glass spheres) in a matrix of PBT on several mechanical properties: elasticity modulus, stress at break , elongation at break, energy at break. The mechanical ... -
Investigation of Corrosion Protection by Chemically Applied Patina on Artistic Bronzes
(Universitatea "Dunărea de Jos" din Galaţi, 2012)Increase of pollution in recent years, requires monitoring of the corrosion behavior of artistic bronzes coated with syntetic patina, in urban atmosphere. This present work aims to investigate the corrosion rezistance ... -
The Corrosion Behaviour of Aluminum Alloy 2024-T3 in Acidic Environments
(Universitatea "Dunărea de Jos" din Galaţi, 2012)This research aimed at analysing the acidic corrosion behavior of aluminum alloy 2024-T3 commonly used in the aerospace. We study the variation of corrosion rate with immersion time at different values of H2SO4 concentration ... -
Study for Evaluation and Optimization of Mineral Composition and Structure of Iron Ore Granulation in Sintering Process
(Universitatea "Dunărea de Jos" din Galaţi, 2012)The characterization of iron ore particles is of vital importance for the study of mineral composition. The specific surface area of iron ore particles can be measured by laser diffraction, and mathematical models (based ... -
Physico-Chemical Water Treated with Sonic Generatir and Al2(SO4) Coagulant
(Universitatea "Dunărea de Jos" din Galaţi, 2012)This paper is a study on the problem of using ultrasound in the treatment of raw water. It highlights the effect of ultrasounds produced by the experimental sonic ultrasound generator through the physico-chemical analysis ... -
Thermal Decomposition of Hafnium Ethoxide-Mollecular Precursor for Hafnia Dielectric Thin Films
(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 ... -
Behavior of Refractories in Interaction with Metallurgical Slag
(Universitatea "Dunărea de Jos" din Galați, 2012)The aim of this paper is to present the studies concerning behavior of the refractory to metallurgical slag corrosion. The corrosion resistance at high temperatures using the static method on samples containing chamotte ... -
An Isothermal Model for Evaluating Stress and Strain in the Polymeric Block of the Block-on-Ring System
(Universitatea "Dunărea de Jos" din Galați, 2012)This paper presents the results of simulating an isothermal frictional contact between a polymeric block and a steel ring. The model takes into account the elasto-plastic behavior of the polymeric materials and the ... -
Research on the Production of Sintered Powder 316
(Universitatea "Dunărea de Jos" din Galați, 2012)The 316 austenitic stainless steel powders are typically used in applications requiring good corrosion resistance, mechanical strength at high and very low temperatures, good ductility, wear resistance, associated in ... -
Method of Deternining the Main Features of Magnetic Ferromagnetic Materials
(Universitatea "Dunărea de Jos" din Galați, 2012)The purpose of this paper is to present a method for determining the main magnetic features such as magnetic induction B, magnetization M, the coercive magnetic field Hc, permeability μ, using hysteresis cycle chart. The ... -
Mechanical properties and Abrasive Wear Behavior of Fluidized-bed Carburized Sintered Iron Alloys
(Universitatea "Dunărea de Jos" din Galați, 2012)This paper is a study of the influence of fluidized bed carburizing of sintered steels on the mechanical properties and the abrasive wear behavior for two different types of powder. Carburizing was carried out at a ... -
Increase of Converter Life by Own Slag Coating
(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 ... -
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. -
Measurement and Analysis of Vibrations on a Cold Rolling Mill for Steel Strip
(Universitatea "Dunărea de Jos" din Galați, 2012)In this paper the authors made measurements and registration of vibration by using accelerometers posted on the top backup rolls. This is a new way for predict the damage in the rolling mill equipment and the precision ... -
Nanocomposite Coatings Obtained by Electro-Co-Deposition of Inert Particles with Cobalt-a Review
(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 ... -
The Consequence of Heavy Metals Impact on Primary Teeth
(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 ... -
Modification of Surface Properties by Laser Cladding with Ni-Cr-B-Fe-Al Alloy
(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 ...
