Preparation and Characterization of Master Alloys Fe48Cr15Mo14C15B6Y2 Metallic Glasses

The purpose of this work is the characterization of a master alloy of metal glass based on iron Fe48Cr15Mo14C15B6Y2. Two types of alloys studied B1 which has been prepared by the use of pure element and the other B2 which has been prepared by the use of raw materials. The thermal and structural properties of the samples are measured by a combination of high temperature differential scanning calorimeter (HTDSC), X-ray diffraction and scanning electron microscopy (SEM). Chemical compositions are checked by energy dispersive spectroscopy analysis.Fil: Bendjemil, Badis. University of Badji -Mokhtar; Argelia. Faculty of Sciences and Technology; ArgeliaFil: Seghairi, Nassima. Faculty of Sciences and Technology; ArgeliaFil: Lavorato, Gabriel Carlos. Dipa rtimento di Chimica Universita' di Torino; Italia. Comisión Nacional de Energía Atómica. Gerencia del Área Investigaciones y Aplicaciones no Nucleares; ArgentinaFil: Castellero, Alberto. Dipa rtimento di Chimica Universita' di Torino; ItaliaFil: Bougdira, Jamal. Université de Nancy, Faculté des Sciences et. Techniques; FranciaFil: Vinai, Franco. Instituto Nazionale di Ricerca Metrologica; ItaliaFil: Baricco, Marcello. Dipa rtimento di Chimica Universita' di Torino; Itali

Crystallization Kinetics and Magnetic Properties of Fe40Ni40B20 Amorphous Ribbon

Fe-based bulk metallic glasses (BMGs) have been extensively studied due to their potential technological applications and their interesting physical and mechanical properties such as a low modulus of elasticity, high yielding stress and good magnetic properties. In the present work, theamorphous ribbonformation of Fe40Ni40B20 (numbers indicate at. %) with a ribbon form was fabricated by the single roller melt-spinning method. Rapid solidification leads to a fully amorphous structure for all compositions. The thermal properties associated with crystallization temperature of the glassy samples were measured using differential scanning calorimetry (DSC) at a heating rate of 10℃/mn. The microstructure and phase formation of the alloy have been analyzed by using X-ray diffractometry (XRD).The effect of high temperature on the isothermal crystallization of Fe40Ni40B20 ribbon was investigated by HTX-ray diffraction. In addition, these ribbon glasses also exhibit good soft magnetic properties with M-H curvature were measured under the magnetic fields between –1 kOe and 1kOe

‘Study of the Nanocomposite cBN/TiC-SWCNTs by Field Actived Sparck Plasma Sintering Process’

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Pharmacological Molecule Based on Nanocarbon Container Encapsulated Ferromagnet by Combustion Synthesis for Cancer Therapy

Abstract Combustion synthesis in electrothermal explosion mode can be regarded as an efficient method to obtain new nanomaterials. Different starting mixtures of magnesium powder with various carbonates (Li 2 CO 3 , Na 2 CO 3 , CaCO 3 , FeCO 3 , (NH 4 ) 2 CO 3 ) were tried and the self-thermal reactions were carried out under both reactive (air) and neutral atmosphere (argon) with an initial pressure of 10 atm to yield novel nanomaterials. Fe, Co, Ni, Pd, Nd, Ta, Ti, Nb, W and NiO powders were used as catalysts and their synthesis and purification have been optimized. Under the applied conditions the presence of crystalline MgO and NaO 2 in products confirmed by XRD analysis, even for the reaction under neutral atmosphere, points to the deep conversion of carbonates. For producing fibrous products the Na 2 CO 3 system proved to be the most promising one. FESEM images show the morphology of the products with some 1-D nanostructures resembling carbon nanotubes and nanosized metal/carbon composite (carbon-encapsulated metal-based iron nanoparticles with a core-shell structure with interesting magnetic properties by combustion was obtained. Different magnetic metals (Fe, Ni, and Co) that can be encapsulated by the carbon shell, graphite layers and nanofibers. After purification procedure, we will only obtain core-shell or graphite layers encapsulated by metal magnetic nanoparticles without impurity like noncoated iron or carbides and amorphous carbon. The characterization techniques include the chemical analysis, HRTEM, XRD and FESEM.. The obtained novel pharmacological molecular nanostructure will be injected in the cancer tumor cell (prostate) after sterilization. The nanocontainer will be heated by microwave at the Laboratory Central of Anatomie and Cytology Pathology of the CHU Annaba. The reaction will be observed in the HRTEM

Synthesis of TiC(1-x)–ZrCx (x=0.2) composite by FAST-SPS-FCT technology, effect of SWCNTs and nano-WC additions on structural properties: Application for ballistic protection

This paper describes the SWCNTs and nano WC when were introduced into TiC(1-x)– ZrCx with (x=2) nano-composite into ceramics to improve the fracture toughness (KIC) and hardeness (Hv). TiC–ZrC, TiC–ZrC–single walled carbon nanotubes (SWCNTs) (3 mass %) and TiC–ZrC–SWCNTs (3 mass %) - tungestun nanocarbide (NWC) (20 mass %) nano-composites were prepared by vacuum sintering FAST-SPS-FCT technology at the temperatures in the range of 1700–1800 °C for 400 s under pressure of 50 Mpa. Microtructural properties were investigated by X-ray diffraction and energy-dispersive spectrometry in addition scanning electron miroscopy. The investigations shows that the phase separation of the as-sintered (Ti, Zr) C into two phases: TiC-rich (Ti, Zr) C (dark) and ZrC-rich (Zr, Ti) C (bright) indicating that the as-sintered (Ti, Zr) C was thoroughly decomposed into two solid phases after sintering. The effect of nanostructures of SWCNTs and NWC is already illustrated. X-ray diffraction and energy-dispersive spectrometry results indicate that bright grains are (Zr, Ti) C solid solution. The relative density increases with the addition of SWCNTs and nano-WC content. Fully dense TiC-ZrC, TiC–ZrC-SWCNTs and TiC–ZrC-CNTs-NWC nanocomposites with a relative density of more than 98 % were obtained. The Vickers hardness (HV) and fracture toughness (KIC), of TiC-based nano-composites with SWCNTs and NWC will be performed in the near future. In addition, ballistic performance (the properties of shock resistance) ; thermo-mechanical modelling in-situ FAST-SPS-FCT cycle, also will be evaluated using the Rosenberg model and compared with the experimental results in order to better understand the shock behavior of nano-composites that to be applied for body armo