Materials Literature
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The strength and corrosion properties of austenitic steels could be improved through adding appropriate amount of nitrogen and reducing the amount of carbon, while the plasticity and toughness are not influenced. The corrosion performance of 316NG and 304NG nitrogen-containing stainless steels and 321 stainless steels…
This paper discusses the existence of single-wall carbon nanocones (SWNCs), especially nanohorns (SWNHs), in organic solvents in the form of clusters. A theory is developed based on a bundlet model describing their distribution function by size. Phenomena have a unified explanation in bundlet model in which free energ…
A stopped-flow study has shown that tetrakis(pentafluoro-phenyl)porphyrin iron(III) chloride reacts rapidly (<3 ms) with hydrogen peroxide to form a Fe(III)-H(2)O(2) complex where log K = 2.39. This subsequently undergoes rapid intramolecular conversion (k = 4.4 s(-1)) to an iron(IV) intermediate, which in turn reacts…
The nanopowder of CoFe2O4 at different pH is prepared by Co-precipitation method. The X-ray diffraction studies confirm the phase formation at room temperature. The particle size and lattice constant is found to be increasing with pH. The particle sizes are measured from FE-SEM are found to be in the range of 17 – 23…
The work carried out by the authors over the last decade on the processing, microstructural characterization and the mechanical behaviour of Mg alloys is reviewed. In particular, the potential for grain refinement and for the development of specific textures of large strain hot rolling (LSHR), equal channel angular pr…
A numerical simulation study was carried out to investigate the effects of thermal and solutal Marangoni convections (thermosolutal Marangoni convection) on transport structures in a liquid bridge under zero gravity. The liquid bridge in the model represents a three dimensional half-zone configuration of the Floating…
This paper makes use of electrospinning technology to produce multiwalled nanotubes and polyurethane (MWNTs/PU) composite nanofibrous membranes. A thermal treatment method was proposed to improve the comprehensive properties of the membranes. The morphology of the prepared nanomaterials was characterized by the SEM an…
The present work performs self-consistent ab initio full-potential linear muffin-tin orbital (FP-LMTO) method to study the structural and electronic properties of the ternary ZnxCd1-xSe alloy, based on density functional theory (DFT). In this approach, both the local density approximation (LDA) and the generalized gra…
Adhesively bonded metallic T-joints were subjected to impact at different loading directions and loading rates ranging from quasi-static to crash. Different damage and failure mechanisms were observed depending on the loading configuration. Finite element simulations were performed with ABAQUS/explicit using a user-de…
A series of submicron organic pigment microcapsules with high pigment encapsulating efficiency and narrow particles size distribution was prepared via in-situ miniemulsion polymerization. The self-adhesive pigment microcapsules were applied to pigment printing of silk fabrics. It was found from printing qualities that…
We report the analysis of a reducing-agent-free synthetic method based on intense X-ray irradiation in the presence of 11-mercaptoundecanoic acid (MUA) and their application in biomedical imaging. The method is very effective in controlling the size and size distribution of Au nanoparticles in colloidal solutions: gol…
This paper presents preliminary studies and work in progress in the framework of two FP7 projects: MEMORI (Measurement, Effect Assessment and Mitigation of Pollutant Impact on Movable Cultural Assets – Innovative Research for Market Transfer) and NANOFORART (Nano-materials for the conservation and preservation of mova…
Deposition of polysilicon (poly-Si) was tried to increase productivity of poly-Si by using two different types of gas nozzle in a monosilane Bell-jar Siemens (MS-Siemens) reactor. In a mass production of poly-Si, deposition rate and energy consumption are very important factors because they are main performance indica…
Orthogonal and single factor intermittent turning experiments of hardened AISI 1045 steel were conducted with two kinds of Al2O3-(W, Ti)C ceramic tools used, aiming to reveal the effects of cutting parameters on cutting forces, the influence of mechanical and thermal loads on tool wear mechanisms at different wear evo…
Resonant optical antennas are ideal for nanoscale nonlinear optical interactions due to their inherent strong local field enhancement. Indeed second- and third-order nonlinear response of gold nanoparticles has been reported. Here we compare the on- and off-resonance properties of aluminum, silver, and gold nanoantenn…
The electroactive and blue luminescent substituted diphenyl quinoline derivative OMe-DPQ and Cl -DPQ have been synthesized and characterized by FT-IR. The optical properties are investigated by UV–vis absorption and photoluminescence (PL) measurements. The polymeric compounds show two absorption peaks and exhibits int…
The color of red blood cell concentrate (RBCC) limits its application in human food, but there is potential to use it for second-generation bioplastics. Several methods have been developed to remove color from RBCC, but they are expensive or may produce difficult-to-remove toxic residues. Hydrogen peroxide treatment i…
The ability of nanoporous carbon adsorbents to display size/shape selective adsorption behavior for energetic nitrate ester molecules was examined. Carbon adsorbents with variable pore size and pore volume were prepared from the pyrolysis of polymeric precursors. Liquid nitrate esters including triethylene glycol dini…
We conducted time-resolved spectroscopic observations of shock-heated quartz and forsterite using a high-power laser. The results revealed that ionization occur easily under shockinduced warm dense conditions. We compare the obtained temperatures on the Hugoniot with a few theories. The comparison suggests that the co…
As altas temperaturas ocorrentes durante a queima na floresta Amazônica podem induzir transformações mineralógicas da fração argila. Este trabalho objetivou avaliar as alterações mineralógicas nas frações areia, silte e argila e na reserva mineral de solos submetidos a diferentes manejos (11 anos de mata secundária, p…