Căutare după Autor "Constantinescu, Stela"

Afișează articolele 1-8 of 8

    • Characterisation of CVD Niobium Carbine Coatings on Hard Carbide Substrate 

      Constantinescu, Stela; Vlad, Maria; Radu, Tamara (Universitatea "Dunărea de Jos" din Galaţi, 2012)
      Hard coatings are often used for mechanical properties such as wear and friction resistance. The corrosion behaviour may also be an important criterion for industrial applications of these coatings. In this paper, the ...

    • Characterization of Sintered Hardmetals Coated with Tic 

      Constantinescu, Stela; Orac, Lucica (Universitatea "Dunărea de Jos" din Galaţi, 2013)
      This paper presents the realization of TiC thin films by CVD method. The thin layers of TiC thicknesses were 8 and 10μm, their thickness increasing with time, keeping the temperature. Diffractometer analysis certifies ...

    • Coatings Systems: Chromium Carbide, Nitride and Carbonitride 

      Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2005)
      The process of the chemical deposition from vaporous implies the adsorption of the mobile atoms (monomers) on the substrate surface, their migration with embryos and stable nucleus formation, followed up by further growth ...

    • Improvement of Steel Sheet Corrosion Resistance by Thermic Coverage Method with Zinc-Aluminium Alloys 

      Vlad, Maria; Olga, Mitoșeriu; Constantinescu, Stela; Stratulat, Emil (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 ...

    • Influence of Cooling Oil on the Surface Quality of the Roller Strip 

      Radu, Tamara; Constantinescu, Stela; Potecaşu, Florentina (Universitatea "Dunărea de Jos" din Galaţi, 2014)
      The excess of emulsion used in the lamination process leads to the formation of drops which in the annealing process forms spots of burned emulsion. It was also shown to cause formation areas with high carbon concentrations ...

    • Influence of Heat Treatment Technology on the Structure and Properties of Thick Sheet Steel ASTM14 Degree F 

      Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2015)
      In this paper, based on the researches carried out a heat treatment technology can be determined which further lead to an optimum set of mechanical properties according to the technical conditions: A. Annealing (austenite ...

    • Structure-Property Correlation of Composite Materials Based on Cu-Mo obtained by PVD Method 

      Orac, Lucica; Grechanyuc, Vera; Mitoșeriu, Olga; Constantinescu, Stela (Universitatea "Dunărea de Jos" din Galați, 2013)
      The paper describes reviews referring to determination of working parameters of the development processes of composites in copper matrix, by vapour-phase deposition method. The molybdenum was used as complementary phase. ...

    • Study and Researche Regarding Binaring Sistem with TIOBIS - β – NAFTOL 

      Mitoșeriu, Olga; Constantinescu, Stela; Orac, Lucica (Universitatea "Dunărea de Jos" din Galați, 2007)
      This paper presents the results for contribution of determining the manganese from waters and steel. Manganese, due to its properties, cannot be found but in acid waters and usually associated with iron. In small amounts, ...