Materials Literature
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Dense nanocrystalline Y2O3 ceramics without grain growth have been successfully obtained by a new method, which is based on the self-propagating high temperature synthesis and quick pressing. A suitable self-propagating system with a maximum combustion temperature of 1350 °C and a heating rate of 1300 °C/min was chose…
Large area arrays of highly oriented sulfur (S2-) doped ZnO nanorods are grown on silica glass substrate by wet chemical decomposition of zinc-thiourea precursor in an aqueous medium. A series of five samples were synthesized by varying the concentrtaions of sulfur ions in solution. The synthesized materials were stud…
A group of boron-carbon ceramic material was in-situ synthesized and densified simultaneously via Spark Plasma Sintering (SPS) technique from carbon and boron element powders with different molar ratio. The phase structures of samples with different B/C molar ratio were characterized by X-ray Diffraction (XRD). The B/…
The systems Pd(II)-Cl − -HA-H 2 O (where HA are the conformers of 2-methylamino-1-phenylpropan-1-ol) were studied. The acid dissociation constants of the ligands HA and the resulting complexes were determined by pH-metric titration and mathematical modeling. The pH-distribution diagram of the complex species in the sy…
In this study, microwave ceramic Ba 2 Ti 9 O 20 thick films were successfully fabricated by aerosol deposition (AD) with carrier gases of oxygen and argon. Ba 2 Ti 9 O 20 films with uniform thicknesses of 6 µm were obtained. The grain sizes of the films were ≈0.2 µm, which were much smaller than those of the starting…
This paper presents initial development of polymer nanocomposites (PNC) material for rapid manufacturing (RM) application. PNC materials containing a polyamide (PA) and nano particles (5wt%) were produced by solution blending with the aim to improve the mechanical properties. Commercial polyamide 6 (PA6) was dissolved…
As a substitute for lime, a novel liming agent based on sodium silicate and enzyme was applied in a lime-free liming process. This innovative process achieved an equivalent effect on fibre opening, shrinkage temperature (Ts) and mechanical properties of crust leather compared with a conventional liming process. The en…
Ceramic pellets of Ag 1-x Na x NbO 3 (x = 0, 0.3, 0.5 and 0.7), system have been prepared by solid-state reaction method and sintering process. The prepared samples are characterized by XRD and SEM techniques. Lattice parameters and crystallite size have been calculated by XRD pattern and grain size has been calculate…
Article Crystal structure of ammonium tetrairon trisphosphate(V), [NH4][Fe4(PO4)3] was published on April 1, 2009 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 224, issue 1-4).
Fil: Molina Tirado, Liliana Beatriz. Instituto Nacional de Tecnologia Industrial; Argentina
The aim of this study is to develop degradable starch based packaging film with enhanced mechanical properties. A series of low density polyethylene (LDPE)/sago starch compounds with various sago starch contents were prepared by twin screw extrusion with the addition of maleic anhydride grafted polyethylene as compati…
In this work the results of physical and numerical modeling of stresses in metal during continuous casting were shown. The numerical research for St3S ingot were realized. Computer program based on Finite Element Method (FEM) was used to simulation. Investigated conditions were based on actual data received from one o…
In this paper a spectral correction based algorithm for spectral component determination based on DFT is proposed for especially highly fluctuating fundamental frequency cases. When DFT is used with a standard window length at a multiple of the fundamental period assuming the nominal frequency does not change, interha…
In the manufacture of CFRP(Carbon Fiber Reinforced Polymer Composite) composite structures, various independent components join by bolts and pins. Holes for bolts and pins have an effect on the failure strength of such structures, because those act as notches in structures. The failure characteristic of such structure…
The paper has probed into the torque ripple of brushless DC motor fed by square wave. For the main torque ripple caused by electromagnetic factor, the equation of two-phase brushless DC motor has been deduced. Then considering the manufactured technique of the motor, an improved design for reduction the torque ripple…
Modern electrical machines must be designed as rugged and flexible. The use of power electronic devices cause voltage spikes and introduce harmonics that electrically degrade the insulation of the windings in the machines. Power electronic driver circuits required high frequency and high operating temperatures, which…
The solid oxide fuel cell/gas turbine (SOFC/GT) hybrid power systems can utilize exhaust fuel and waste heat from fuel cells in gas turbines to increase system efficiency. The control system plays a critical role in achieving the synergistic operation of various subsystems, improving the reliability of operation, and…
In this paper, the melting behaviors of the glass-like cluster Au 19 are calculated and analyzed by using standard microcanonical molecular-dynamics simulations. The calculated results show a multi-step melting process. The first stage involves the majority of the surface atoms (14 atoms). An interesting phenomenon is…
Comparative analysis of the processes for preparation of high-density silicon carbide coatings by the fluidized-bed pyrolysis of the SiCl 4 + CH 4 + H 2 + Ar and CH 3 SiCl 3 + H 2 + Ar mixtures on pyrocarboncoated zirconium carbide particles was performed. The degree of perfection of the atomic-crystalline structure o…
Coating of nanoparticles on fabrics provides huge potential applications in textile industry. The microencapsulation process is used to encapsulate the nanosilica particles which is used to coat on the surface of fabrics and to observe the special properties such as anti-bacterial, wrinkle resistance, etc. The amorpho…