Now showing items 60-79 of 121

    • HERMAL AND MICROSTRUCTURAL PROPERTIES OF MAGNETOCALORIC (Fe25Mn75)2P POWDERS 

      BRAHIMI, AFEF; ALLEG, SAFIA; AZZAZA, S; SÜNOL, J.J (Université des Frères Mentouri Constantine, 2013-12-16)
      The mechanical alloying process has been used to prepare nanocrystalline (Fe25Mn75)2P alloy from elemental Fe, Mn and P powders in a high energy planetary ball mill Retsch PM400, under argon atmosphere, using hardened ...
    • HIGHLY TEXTURED ZnO AND ZnO:V THIN FILMS DEPOSITED BY PULSED LASER DEPOSITION 

      SMAALI, A; ABDELLI-MESSACI, S; LAFANE, S; KHEREDDINE, Y; KERDJA, T; KECHOUANE, M; NEMRAOUI, O (Université des Frères Mentouri Constantine, 2013-12-16)
      In this work ZnO and ZnO doped vanadium (1 - 6 %) thin films were deposited on glass substrate by the pulsed laser deposition technique. The films were deposited at 500°C under oxygen ambient pressure of 10-2 mbar with ...
    • HISTIDINIUM TRICHLOROCADMATE (II) 

      BOUFAS, SIHEM; MOHAMEDI, NACIRA; BÉNARD-ROCHERULLÉ, PATRICIA; ROISNEL, THIERRY (Université des Frères Mentouri Constantine, 2013-12-16)
      The use of hybrid materials based on cadmium (II) is very important. In this work we expose the structure details of a new compound based on cadmium(II). The cadmium site is four coordinated with CdX4O environment. The ...
    • IDENTIFYING DEFECT SIZE IN TWO DIMENSIONAL PLATES BASED ON BOUNDARY MEASUREMENTS USING REDUCED MODEL BY PROPER ORTHOGONAL DECOMPOSITION AND GENETIC ALGORITHM 

      BENAISSA, B; BELAIDI, I; HAMRANI, A; KHATIR, S (Université des Frères Mentouri Constantine, 2013-12-16)
      In this study we use the material elastic properties as a base, a tow dimensional cracked plate is modeled by finite element method (FEM) and reduced by proper orthogonal decomposition (POD) and used as an inverse problem ...
    • INFLUENCE DE LA BARRIERE DE DIFFUSION DE PALLADIUM SUR LA REACTION INTERFACIALE ENTRE LE TITANE ET LE SILICIUM 

      HAMROUN, M.S.E; BENAZZOUZ, C; HAMMOUDI, A. H (Université des Frères Mentouri Constantine, 2013-12-16)
      Le présent travail consiste à une étude comparative de l’interdiffusion et de la réaction à l’état solide entre deux systèmes Ti/Si(111) et Ti/Pd/Si(111), dans le but de mettre en évidence l’intérêt d’intercaler la couche ...
    • INFLUENCE DU RECUIT DES SUR L'EVOLUTION DE LA TEXTURE DE L’ALLIAGE ALUMINIUM-LITHIUM 

      BOURAHLA, S; AMICHI, R (Université des Frères Mentouri Constantine, 2013-12-16)
      L’alliage d’Aluminium-Lithium est à l’origine d’une nouvelle génération d’alliage légers. Aussi ces alliages présentent un comportement superplastique. Ce comportement est lié à une structure à grains fins. Le développement ...
    • INFLUENCE OF ZnO SEED LAYER ON THE EVOLUTION BEHAVIOR OF ZnO NANORODS STRUCTURES 

      LAKEHAL, S; ACHOUR, S (Université des Frères Mentouri Constantine, 2013-12-16)
      ZnO nanorods were grown in a two-stage process, using sol-gel deep coating or electrodeposition methods deposited ZnO seed layers as a nucleation platform for subsequent hydrothermal growth. We present a comparison between ...
    • MICROSTRUCTURAL CHARACTERIZATION OF Al-Zn ALLOYS PRODUCED BY HIGH-FREQUENCY MELTING 

      LAMROUS, D; DEBILI, M.Y; BOEHM-COURJAULT, E (Université des Frères Mentouri Constantine, 2013-12-16)
      The microstructural characterization of aluminium-zinc binary alloys, prepared by high frequency (HF) melting showed that the as-cast Al-10%Zn alloy has a dendritic structure with a phase separation. Al-30%Zn alloy shows ...
    • MODELING OF SILICON SOLIDIFICATION USING A MODIFIED BRIDGMAN TECHNIQUE 

      OUADJAOUT, D; HAMADAS, I (Université des Frères Mentouri Constantine, 2013-12-16)
      Directional solidification is one of the most popular techniques for massive production of multi-crystalline silicon (mc-Si). A numerical model is developed to simulate the silicon ingot directional solidification process. ...
    • Ni INSERTION EFFECT ON THE ELECTRONIC PROPERTIES OF ZnS: DFT STUDY 

      CHAFI, Z; MESBAHI, M (Université des Frères Mentouri Constantine, 2013-12-16)
      The present study examines the atomic insertion of Ni on ZnS bulk and focuses on the ZnS and Ni-ZnS electronic properties. For this purpose we used the Wien2k code based on the theory of density functional theory (DFT). ...
    • NUMERICAL MODELING AND MEASUREMENT OF SURFACE POTENTIAL DECAY OF CORONA CHARGED BIOMEDICAL POLYMER 

      HITOUM, N; SAHLI, S; ZIARI, Z; BELLEL, A (Université des Frères Mentouri Constantine, 2013-12-16)
      Among the most used techniques in the electrical activation and surface functionalization of dielectric materials, the corona discharge is the most simple and attractive to implement. By using this electrostatic technique ...
    • OPTICAL SENSORS FOR GAS SENSING USING ZnO THIN FILM DOPED IN ALUMINUM 

      HABIA, M.I; AYADI, KH; MANALLAH, AI (Université des Frères Mentouri Constantine, 2013-12-16)
      Surface plasmon based optical sensors have attracted a great interest in the last 10 years mostly for biochemical or biomedical applications. Refractive index variations in the probed optical medium are rapidly observed ...
    • PERSPECTIVE DE CONCEPTION D’UN IMMUNOCAPTEUR A BASE DE NANOPARTICULES D’OR 

      CHABANE SARI, S.M; ZERGOU, S (Université des Frères Mentouri Constantine, 2013-12-16)
      La synthèse de nanoparticules par réduction chimique est la technique la plus utilisée pour former des solutions colloïdales de nanoparticules métalliques. De plus, parmi toutes les techniques de synthèse, elle offre le ...
    • PHASE TRANSFORMATION IN PORCELAIN FIRED AND PORCELAIN RAW ALGERIAN MATERIALS 

      KITOUNI, S; HARABI, A (Université des Frères Mentouri Constantine, 2013-12-16)
      This work presents an investigation that was undertaken for four formulations of porcelain. Compositions prepared by mixing materials such as kaolin, quartz, potash feldspar and talc, were investigated. Results are ...
    • PHÉNOMÈNE DE RECRISTALLISATION DANS L’ALLIAGE AU4G 

      GUESSOUM, M; RAHO, A; YOUSFI, H (Université des Frères Mentouri Constantine, 2013-12-16)
      Le présent travail, à caractère expérimental, porte sur l’étude de phénomènes de recristallisation dans l’alliage AU4G. L’étude expérimentale est consacrée à l’observation des grains, joints de grains ainsi que les gros ...
    • PREPARATION ET CARACTERISATIONS DE FILMS NANOCOMPOSITES D’AEROGEL DE ZnO DISPERSES DANS LA SILICE 

      SLIMI, O; DJOUADI, D; CHELOUCHE, A; AKSAS, A (Université des Frères Mentouri Constantine, 2013-12-16)
      Des films nanocomposites formés par des particules d’aérogel de ZnO dispersées dans une matrice de silice et déposés par les techniques dip-coating et spincoating ont été élaborés. L’aérogel de ZnO a été synthétisé par ...
    • PREPARATION OF Cu2ZnSnS4 THIN fiLMS BY ULTRASONIC SPRAY METHOD 

      DARANFED, W; AIDA, M.S; ATTAF, N (Université des Frères Mentouri Constantine, 2013-12-16)
      In the present work we report the details of the preparation and characterization results of Cu2ZnSnS4 (CZTS) based solar cells. The CZTS absorber was elaborated by spray ultrasonic method has been investigated. Samples ...
    • PREPARATION OF ZINC SULFIDE THIN FILM BY CHEMICAL BATH DEPOSITION 

      LEKIKET, H; AIDAAND, M.S (Université des Frères Mentouri Constantine, 2013-12-16)
      ZnS thin films have been deposited on glass slide substrates by the chemical bath deposition method at 80 °C for 60 min. The solutions in the reaction bath were prepared from ZnSO4 7H2O, SC(NH2)2, NH3 and N2H4. The ...
    • PREPARATIONS OF Nd:TiO2 AS LASER ACTIVE MEDIUM VIA SOL-GEL TECHNIQUE 

      ALWAN HAMZA, MOHAMMED; NASRO SAIOF, FAWAZ; SALEH AL EITHAWEE, ADNAN (Université des Frères Mentouri Constantine, 2013-12-16)
      Pure and Nd3+ doped Nanotitania are successfully prepared by wet chemical synthesis method. Samples were analyzed by a variety of techniques, including X-ray diffraction, FTIR, absorption and emission spectrometer to ...
    • PRESSURE EFFECT ON THE DIELECTRIC PROPERTIES OF THE ZINC-BLENDE ZnSxSe1-x 

      KHEDIRI, F; BECHIRI, A; BENMAKHLOUF, F (Université des Frères Mentouri Constantine, 2013-12-16)
      Dielectric properties of the semiconductor alloy ZnSxSe1-x and its binary compounds ZnS, ZnSe under the normal and hydrostatic pressure are calculated by the empirical pseudopotential method (E.P.M) associated with the ...