Materials Literature
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Influence of deposition parameters on the properties of CdTe films deposited by close spaced sublimation
CdTe thin films are used as absorber layer in CdS/CdTe solar cells. The microstructure of this absorber layer plays a fundamental role in photovoltaic conversion and can be controlled by the deposition parameters used during the film growth. In this work, CdTe thin films were deposited by the CSS method onto glass sub…
Characterization study of electric arc furnace dust phases
Electric arc furnace dust (EAFD) is a solid waste generated in the collection of particulate material during steelmaking process in electric arc furnace. The aim of this work is to carry out a chemical and structural characterization of two EAFD samples with different Zn contents. Optical emission spectroscopy via ind…
Hybrid processing of Ti-6Al-4V using plasma immersion ion implantation combined with plasma nitriding
Based on the fact that the Ti-6Al-4V alloy has good mechanical properties, excellent resistance to corrosion and also excellent biocompatibility, however with low wear resistance, this work aims to test plasma processes or combination of plasma and ion implantation processes to improve these characteristics. Two types…
A contribution of X ray diffraction analysis in the determination of creep of Si3N4 ceramics
The understanding of the creep behavior of silicon nitride (Si3N4) is extremely complex because of a large number of parameters influencing simultaneously the creep deformation of the materials. In general, the main creep mechanisms acting in these materials are grain boundary sliding or materials transport by solutio…
Evaluation of the Degradation of Traditional and ECCS Canning Tinplates in Acetic-Acetate Medium
Liquid Infiltration Joining of 2D C/SiC Composite
A C/SiC composite was prepared by chemical vapor infiltration. The joining of the composite was carried out by liquid infiltration process under conditions of axial pressure (15 MPa) at 1300 C in vacuum with different holding time range from 15 min to 60 min. A kind of Ni-base alloy was used as the interlinker. The mi…
Statistical design applied to hydric property behaviour for monitoring granite consolidation and/or water-repellent treatments
The suitability of granite conservation treatments (consolidation and/or water-repellency) wide/y used to protect heritage structures was evaluated on the basis of the changes occurring in the intrinsic characteristics of the stone (imbibition capacity open porosity total water-accessible porosity water vapour permeab…
Congress and Seminars
Risks for the readymix concrete producer and contractor according to the acceptance or rejection criteria specified in different standards (part II)
This paper continues the work done on Part I included in this Volume. Based on the conformity and acceptance criteria analysed on Part I (1), EN 206-1:2000 (2) and AC/-318 (3) standards are studied and compared to EHE (4) standard described in Part l. The paper conclusions include concepts derived from the previous wo…
Structural and magnetic study of the MnAs magnetocaloric compound
The temperature induced phase transition in MnAs is analyzed in this work using X ray Rietveld refinement. The results show the presence of the hexagonal phase (P6(3)/mmc) at room temperature and the first-order structural-magnetic transition to the orthorhombic phase (Pnma) around 318 K was followed in detail. The Mn…
Effect of asphaltene and resin oils on the viscosity of bituminous petroleum materials to be used as asphalt primers
The bituminous crude from the Machete, Venezuela, area, which has such a fluid consistency that it falls outside the normal scope of the A5TM D-5 (1) penetration test exceeding the 3D-mm ceiling specified in that standard and can be used as an asphalt primer: Like other asphalt products, these materials are -chemicall…
Static and Dynamic Wetability of Molten Al on Al2O3 and ZrO2 Substrates
The influence of melt convection on dendritic spacing of downward unsteady-state directionally solidified Sn-Pb alloys
Microstructures are the strategic link between materials processing and materials behavior. A dendritic structure is the most frequently observed pattern of solidified alloys. The microstructural scales of dendrites, such as primary and secondary arm spacings, control the segregation profiles and the formation of seco…
Aerodynamic and Structural Design of Glass/Epoxy Skin-Urethane Foam Sandwich Composite Blades for 1kW Class Wind Turbine
Structural Performance of Concrete T-beam Bridge Strengthened with Fiber Reinforced Plastics, CFS, GFRP and AFS
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Thermal and mechanical behavior of injection molded Poly(3-hydroxybutyrate)/Poly(epsilon-caprolactone) blends
Aiming the development of high-performance biodegradable polymer materials, the properties and the processing behavior of poly(3-hydroxybutyrate), P(3HB), and their blends with poly(epsilon-caprolactone), PCL, have been investigated. The P(3HB) sample, obtained from sugarcane, had a molecular weight of 3.0 x 10(5) g.m…
Hydrophobic plasma polymerized hexamethyldisilazane thin films: characterization and uses
Hexametildisilazane (HMDS) plasma polymerized thin films obtained using low frequency power supplies can be used to make adsorbent films and turn surfaces hydrophobic. The aim of this work was to verify the hydrophobicity and adsorption properties of HMDS thin films (with and without the addition of oxygen, resulting…